FASTENERS

Exclusive STRUX® Design Offers One-of-a-Kind Performance

ur high-performance STRUX fasteners

offer a stronger and more reliable assembly

alternative to traditional clinch studs and nuts.

Along with stud and nut applications, the

STRUX design can be applied to joints that

require self-tapping fasteners. In most cases,

a STRUX fastening solution will yield significant

time and cost savings when compared to

welded or other staked fasteners.

C O N S I S T E N T R E L I A B I L I T Y

With proper installation, STRUX fasteners canreduce the potential for failure. STRUX productsgive you consistent push-out strength and torquevalues, whether it’s the 10th or 10 millionthfastener being applied.

◆ Visual inspection of joint is fast and clean

◆ Consistent joint integrity prevents failure

E L I M I N A T E S W E L D I N G

STRUX clinch fasteners eliminate the need forexpensive and sometimes hazardous weldingoperations.

◆ No distortion due to excessive heat

◆ Aesthetic value of application is improved

◆ Potential for corrosion is reduced

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S T R U X F E AT U R E S

C R I T I C A L A P P L I C A T I O N S

The high-performance capabilities of STRUXproducts makes them a good match for criticalapplications such as air bags and seat belts.

◆ Complete design and application assistance

◆ Application testing to help you determineproper use

RESISTS PUSH-OUT & ROTATION

Once seated, the displacement lobes keep theSTRUX fastener from rotating during service.Torsional and push-out strength are limitedonly by the shear strength of the engagementmaterial.

E A S Y I N S T A L L A T I O N

STRUX clinch fasteners can be fed manually, orwith any equipment capable of feeding rivets,weld studs or conventional clinch studs. We canwork with you to modify existing equipment, orin the selection of a new automated system.

◆ Increased production rates when usingprogressive dies

◆ Improved product and joint integrity

O

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Stu

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uts

displacement lobes

retaining groove

retaining ring

Improved Joint Integrity. Fewer Failures. Lower Costs.

◆ Typically more expensive toinstall

◆ Flash build-up in threads, whichrequires re-tapping

◆ Possible distortion of mating partcaused by heat build-up duringwelding

◆ Hidden micro-cracks in the weld

Installation of the STRUX nut is essentially the same asthe STRUX stud. The retaining ring passes through thehole and as the displacement lobes seat, the engage-ment material flows into the retaining groove. However,the nut is supported by a spring loaded finder to ensureproper nut set. As the nut is staked, the finder retracts.

◆ Any equipment capable offeeding rivets, weld fasteners orconventional clinch fastenerswill work with STRUX fasteners

◆ Production rates can be greatlyincreased

◆ Assembly costs are reduced

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◆ STRUX fasteners are heat treatedfor greater strength

◆ Fast and easy inspection; allowsnon-destructive testing

◆ The STRUX design ensures pre-determined performance values

◆ Allows you to work with platedparts and dissimilar materials

◆ Can be used in material as thinas 1mm (.040") and smaller

The stud end is fed through a punched or drilled holeand into a lower die. A punch then applies force to thestud. As this occurs, the retaining ring passes throughthe hole. As pressure is applied, the displacement lobesare seated, forcing the engagement material into theretaining groove.

I N S T A L L A T I O N O F S T R U X S T U D S A N D N U T S

WELDING LIMITATIONS STRUX ADVANTAGES STRUX ASSEMBLY

S T R U X C L I N C H S T U D S S T R U X C L I N C H N U T S

STRUX Clinch Studs Increase Productivity and Reliability

ustom-engineered STRUX clinch studs

give you a cost-effective, high-performance

alternative to other staked or welded products.

They are designed for maximum resistance to

push-out and rotation, and are a perfect match

for critical, high-production applications. STRUX

studs eliminate problems associated with weld

studs such as poor product consistency,

excessive equipment costs, the need for

adequate ventilation and environmental hazards.

L O W E R I N - P L A C E C O S T S

STRUX clinch studs can be fed into punched ordrilled holes with automatic feeding equipment ormanually. Because of their increased strength,consistency and reliability, assemblies using STRUXproducts can offer a lower in-place cost than mostother clinch stud products on the market.

RESISTS PUSH-OUT & ROTATION

STRUX studs typically exceed most industry per-formance requirements. Push-out and torsionalresistance are limited only by the shear strengthof the engagement material.

◆ More consistent fastener performance

◆ Improved product integrity

H I G H M A T E R I A L S T R E N G T H

Unlike weld studs, STRUX studs are heat treatedfor increased strength. This allows STRUXproducts to replace larger diameter, conventionalstuds with no sacrifice to joint integrity.

◆ Available in a variety of medium- and low-carbon steels

◆ Available in magnetic and non-magneticstainless steels

◆ Can be heat treated to SAE grades or to yourspecifications

ADDI T IONAL PRODUCT OPT IONS

STRUX studs can join dissimilar and non-weldable materials such as brass, copper andaluminum with ferrous materials. AdditionalSTRUX options are available for varied fasteningrequirements including single- and double-endedstuds, flush head design, unthreaded pinapplications and double grooved.

I M P R O V I N G N U T A S S E M B L Y

The Acupoint™ feature can be added to STRUXstuds to overcome the problem of cross-threadingwhen assembling the nut.

◆ Resists cross-threading and no-start situationsduring nut assembly

◆ Rapid engagement of the nut memberimproves productivity

◆ Compensates for off-angle and off-center starts

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S I Z E R A N G E S & D E S I G N S

STRUX Clinch Studs are available with threadsizes from M4 x 0.7 (#8) through M12 x 1.75(1/2”). Additional sizes may be available onrequest. Design variations include:

◆ Single-end ◆ Double-grooved◆ Double-end ◆ Acupoint™ feature◆ Flush head

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Stu

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Approx.Approx. Unsupported

Retaining Material Recommended Staking Approx. TorsionalThread Ring C D K Thickness Hole Size Force Pushout Resistance

Size +.07 +.13 +.25 Ref Min Min Max kN kN Nm

M4 x 0.7 4.61 1.40 7.75 1.5 1.0 4.68 4.78 13.3 1.04 4.80

2.3 1.5 16.9 2.27 5.01

M5 x 0.8 5.61 1.75 8.75 1.5 1.0 5.68 5.78 13.3 1.09 4.00

2.3 1.5 16.5 2.22 10.73

M6 x 1.0 6.61 2.10 11.00 1.5 1.0 6.68 6.78 20.2 1.42 7.69

2.3 1.5 25.8 2.56 15.22

3.4 2.3 26.7 4.78 15.22

M8 x 1.25 8.61 2.80 15.25 2.3 1.5 8.68 8.78 35.6 2.40 26.78

3.4 2.3 42.3 6.09 40.06

4.6 3.0 45.4 9.06 40.06

M10 x 1.5 10.61 3.50 19.75 3.4 2.3 10.68 10.78 66.7 5.92 60.49

4.6 3.0 73.4 8.82 84.80

M12 x 1.75 12.61 3.80 20.00 3.4 2.3 12.68 12.78 73.4 7.26 81.14

4.6 3.0 77.8 13.91 124.25

Dimensions and Performance Data

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Underhead shape and dimensions controlled by manufacturer to meetperformance requirements.

Larger and smaller sizes not shown may be available on request.

Performance data shown are typical results obtained under laboratory conditions.Tests were conducted after staking studs into low carbon steel with a maximumhardness of Rockwell B70. It is recommended that each application be testedindividually for precise values. For performance in materials other than steel,individual testing is a requirement. This data is not to be considered aspecification.

Contact a Camcar application specialist for design assistance.

Approx.Retaining Approx. Unsupported

Ring Material Recommended Staking Approx. TorsionalThread +.002 C D K Thickness Hole Size Force Pushout Resistance

Size -.003 +.005 +.010 Ref Min Min Max Tons lb. in/lb.

#8 .176 .060 .350 .060 .036 (20 ga) .178 .182 1.6 200 45

.095 .060 (16 ga) 2.0 400 45

#10 .204 .070 .370 .060 .036 (20 ga) .206 .210 2.0 250 70

.095 .060 (16 ga) 2.4 500 70

1/4 .270 .090 .470 .060 .036 (20 ga) .272 .276 3.0 275 80

.095 .060 (16 ga) 3.5 640 160

.135 .090 (13 ga) 4.2 1200 160

5/16 .331 .110 .600 .095 .060 (16 ga) .333 .337 3.9 675 280

.135 .090 (13 ga) 5.3 1290 390

.180 .120 (11 ga) 6.0 2700 390

3/8 .398 .130 .690 .135 .090 (13 ga) .400 .404 6.3 1400 480

.180 .120 (11 ga) 9.0 3000 480

1/2 .530 .175 .950 .135 .090 (13 ga) .532 .536 6.0 1700 718

.180 .120 (11 ga) 9.0 3200 1100

METRIC DIMENSIONAL AND PERFORMANCE DATA

INCH DIMENSIONAL AND PERFORMANCE DATA

D

C

K

Retaining Ring

he unique configuration of STRUX

clinch nuts offers product strength and reliability

that is unmatched. Their easy installation makes

them very cost-effective when compared to

competitive products. And, they can be custom-

engineered to meet your application’s specific

requirements for strength and material usage.

S I Z E R A N G E S & D E S I G N S

STRUX Nuts are available with thread sizesfrom M4 x 0.7 (#8) through M12 x 1.75 (1/2”). You can also work with a Camcar applicationspecialist for additional size options. Designvariations include:

◆ STRUXTITE® nut◆ Flat-edged nut◆ Customized shapes

The Prevalok design provides frictional resistance to rotation.

P R E VA L O K ® P E R F O R M A N C E

STRUX nuts with the Prevalok design have a self-contained prevailing torque feature to providefrictional resistance to rotation. This feature isconfined to the last 1-1/2 threads of the nut, toallow the engaging bolt to be started before thelocking action begins. This assures fast, easyinstallation in addition to increased productintegrity.

◆ STRUX nuts with the Prevalok feature increaseresistance to vibration loosening, which helpthe joint remain secure

◆ The need for supplementary locking measureswith the mating fastener is eliminated

◆ Industry performance standards are oftenexceeded

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T

STRUX Clinch Nuts: Easy Installation & Proven Performance

E A S Y I N S T A L L A T I O N

STRUX nuts can be fed manually, or with anyequipment capable of feeding rivets, weld nutsor conventional clinch nuts. We can advise youon the modification of existing equipment, or onthe selection and installation of a new system.

◆ Increased production rates

◆ Reduced assembly costs

RESISTS PUSH-OUT & ROTATION

Once seated, the displacement lobes keep theSTRUX nut from rotating during fastenerinstallation. Torsional and push-out strengthare limited only by the shear strength of theengagement material.

STRU

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linch

Nut

s

Dimensions and Performance Data

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Underhead shape and dimensions controlled by manufacturer to meetperformance requirements.

Larger and smaller sizes not shown may be available on request.

Performance data shown are typical results obtained under laboratoryconditions. Tests were conducted after staking nuts into low carbon steelwith a maximum hardness of Rockwell B70. It is recommended that eachapplication be tested individually for precise values. For performance inmaterials other than steel, individual testing is a requirement. This data isnot to be considered a specification.

Contact a Camcar application specialist for design assistance.

Approx.Approx. Unsupported

Retaining Material Recommended Staking Approx. TorsionalThread Ring C D K Thickness Hole Size Force Pushout Resistance

Size +.07 +.19 +.13 Max Min Min Max kN kN Nm

M4 x 0.7 7.13 3.19 10.16 1.5 1.5 7.20 7.30 13.3 0.91 6.19

M5 x 0.8 7.61 4.19 11.30 1.5 1.5 7.68 7.78 26.7 1.04 12.00

1.9 1.9 30.2 1.68 21.32

M6 x 1.0 8.61 4.71 14.10 1.5 1.5 8.68 8.78 38.7 1.39 18.85

1.9 1.9 40.0 2.57 21.04

2.3 2.3 42.3 3.22 32.52

M8 x 1.25 10.61 5.93 16.64 1.5 1.5 10.68 10.78 44.5 1.53 21.17

1.9 1.9 48.9 2.41 41.94

2.3 2.3 57.8 4.58 54.23

M10 x 1.5 13.09 7.20 18.42 2.3 2.3 13.16 13.26 53.4 4.16 57.21

3.4 3.4 57.8 4.28 65.65

M12 x 1.75 15.61 9.61 23.88 2.3 2.3 15.68 15.78 108.3 4.75 75.39

3.4 3.4 109.0 7.66 124.32

Approx.Retaining Approx. Unsupported

Ring C Material Recommended Staking Approx. TorsionalThread +.002 +.015 D K Thickness Hole Size Force Pushout Resistance

Size -.003 -.000 +.005 Max Min Min Max Tons lb. in/lb.

#8 .281 .118 .400 .060 .060 (16 ga) .283 .287 1.5 275 80

#10 .300 .157 .445 .060 .060 (16 ga) .302 .306 3.0 300 140

.075 .075 (14 ga) 3.4 630 190

1/4 .339 .178 .555 .060 .060 (16 ga) .341 .345 4.4 250 140

.075 .075 (14 ga) 4.5 480 210

.090 .090 (13 ga) 4.8 730 287

5/16 .418 .226 .655 .060 .060 (16 ga) .420 .424 5.0 610 330

.075 .075 (14 ga) 5.5 790 390

.090 .090 (13 ga) 6.5 860 460

3/8 .516 .276 .725 .090 .090 (13 ga) .518 .522 6.0 880 535

.134 .134 (10 ga) 6.5 940 610

1/2 .615 .371 .940 .090 .090 (13 ga) .617 .621 12.2 700 695

.134 .134 (10 ga) 12.3 1165 800

METRIC DIMENSIONAL AND PERFORMANCE DATA

INCH DIMENSIONAL AND PERFORMANCE DATA

D CK

Retaining RingDisplacement Lobes

STRUXTITE® Clinch Nut Boosts Performance Characteristics

ou can realize enhanced performance

in your clinch nut applications with our

unique combination of a Struxtite clinch nut

and Taptite® II thread-forming fastener.

Matching the nut and bolt in this way forms a

precise fit. This combination results in proper

material relaxation, and also eliminates the

need for a special anti-loosening feature.

THE STRUXTITE CONFIGURATION

The Struxtite nut is a standard STRUX clinch nutwhich is unhardened and untapped to allow theTaptite II fastener to roll form mating threads inthe nut and strengthen the joint through workhardening. This provides:

◆ A more reliable structural joint

◆ Optimum thread engagement

◆ Consistent clamp generation

◆ Elimination of cross threading

STRUXTITE NUT ELIMINATES WELDING

The Struxtite nut eliminates welding operationsand is custom-engineered to meet your require-ments for efficiency, performance and assembly.

◆ Tapping costs are eliminated with the thread-forming fastener

◆ Total in-place costs are further loweredthrough the single-source supply of thisunique combination

RE S I S T S PU S H-OU T & RO TAT I O N

As the Struxtite nut is pressed into the engage-ment material, the displacement lobes force thematerial into the retaining groove for a solid,rotation-resistant assembly.

◆ Retention of the Struxtite nut far surpasses theopposing forces created when the Taptite IIfastener is driven into the nut

◆ Push-out and torsional resistance are limitedonly by the shear strength of the engagementmaterial

INCREASES RESISTANCE TO LOOSENING

The Taptite II fastener provides prevailing torquethat meets locking screw standards IFI 124 & 524,because the tapped material relaxes into therelief areas between the threads.

◆ Lower drive torque than other tapping screws

◆ Excellent drive-to-fail ratios

◆ More consistent transfer of torque into tension

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S I Z E R A N G E S

The Taptite II thread-forming fastener andStruxtite clinch nut combination is available inthread sizes M4 x 0.7 through M12 x 1.75.Other sizes may be available on request.

Designed for Demanding Applications

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The self-clinching STRUX design can often eliminate the space required for awrenching surface. This is useful in areas where the backside of the mating material is inaccessible to hand-wrenching—seat belt attachments on a car flooris one example. Once a STRUX product is installed, push-out and torsionalstrength are limited only by the shear strength of the engagement material.

Applications utilizing the STRUX product can provide lower in-place cost throughimproved joint integrity, fewer failures and more consistent performance. Theycan be engineered to match your specific requirements, and are backed by thelargest fastener supplier in the world.

In applications requiring multiple studs or nuts, the STRUX concept can easily beapplied to component sub-assemblies. The combination of studs and/or nuts intocarrier designs facilitates prepositioning of fasteners during final assembly. Theseassemblies can ease assembly operations, lower installation costs and improveproductivity.

DEMANDING APPLICATIONS

Performance of the STRUX designhas been outstanding in thedemanding world of automotiveapplications. It has also beensuccessfully applied in the powertool, lawn & garden, and applianceindustries. While STRUX productsare highly versatile, they are bestmatched to critical applicationsthat require a high level ofassembly strength and jointintegrity.

STRUX CL I N C H NU T S

Like the STRUX stud, the STRUXnut’s features provide a highlyrotation-resistant assembly. Theflowing of the engagement mate-rial into the retaining groove andaround the lobes is assurance ofjoint integrity. In addition, boththe STRUX stud and nut create aclean appearance, free fromexcess material and splash.

STRUX CL I N C H ST U D S

Upon installation, the displace-ment lobes and retaining grooveof the STRUX stud combine toform a solid, rotation-resistantassembly. The product features aredesigned to effectively lock thematerial into place by creatingmaterial flow into the groove andaround the lobes.

Our Products Work for You

Improved Engagement ♦

A manufacturer of automotive air bags required a lightweight fastener with optimum torsional strength to assemble soft aluminum material. The conventional STRUX shape was modified with underhead lugs, replacing the familiar TORX® shape. This provided better engagement in the soft metal and offered excellent resistance to rotation. In addition, this process allowed better control of bracket flatness which was sometimes altered during installation.

Improved Assembly Line Productivity ♦ The original customer design of a one piece nut with a tapped extrusion, for use in an air bag module, was too costly. Working together with another division of Acument™ Global Technologies, Camcar developed a cost-effective combination of a STRUX clinch nut with a tri-lobular design staked into a larger washer. The new design also matched the drive size of another part used by the customer, standardizing tools on their assembly line.

Increased Joint Integrity ♦

Due to the thinness of the sheet metal in an automotive component, adequate thread engagement of the mating bolt could not be achieved. Through the use of a Struxtite nut and Taptite thread-forming fastener, optimum thread engagement was made possible. This assembly also allowed drive torque and seating torque to be more easily controlled, and the necessary clamp load was achieved with minimal strip-out.

Customized Design ♦

Camcar offers a number of specially-designed STRUX fasteners to satisfy varied fastening requirements. For example, an automotive manufacturerneeded to hold together two pieces of material in a seat frame application fortransportation to a final assembly area. To solve this problem, a special, double-grooved stud was designed. This allowed one stud to hold the second piece of material in place while firmly attached to the base material.

Quality Products Through Design and Technology

Product Testing ◆ Camcar’s testlabs have the ability to closelysimulate your application andassembly conditions. We canverify the performance ofSTRUX products prior toshipment, to ensure productreliability before it reachesyour location. Performancetesting checks resistance topush-out and rotation, as wellas fastener strength andmaterial integrity.

Teardowns ◆ Product teardownsare an excellent way to increaseyour efficiencies. Working withyour application, our engineerscan often find ways toconsolidate the total number offasteners you need, in addition torecommending more effectivefastening solutions. Productteardowns can often savethousands of dollars in costs,along with providing increasedend-product reliability.

Design Assistance ◆ We use avariety of methods to evaluatethe many different aspects of anapplication. Simultaneous engi-neering, application analysisand hands-on testing are allused to examine material,assembly conditions and properjoint design. We can then workwith you to help ensuremaximum performance fromevery fastener you require. Forbest results, we recommendinvolving a Camcar applicationspecialist in the initial phases ofproduct design.

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Assembly Line Review ◆ Fastener surveysand consolidations can offer manyopportunities to reduce your fastenerusage and overall manufacturing costs.Our knowledgeable application specialistswill review your assembly procedures,and make recommendations based onyour productivity and quality requirements.

Design Innovation ◆ Ongoingproduct development at Camcarfocuses on helping our customersmeet their assembly challenges. Bylistening and working with you fromthe early stages of design through finalproduction, we are able to find betterways to fasten your products. Andwe’ll continue to do so.

Value-Added Services STRUX

®

Clinch Studs and Nuts

Sales Service Teams ♦ At TORX Products, each Acument™ customer is assigned to a sales service team. All team members are up-to-date on customer activity and can provide quick and accurate responses to inquiries regarding order status, shipping schedules, quotes and more.

Quality Procedures ♦ Product performance andconsistency is increased by incorporating SPC intothe manufacturing of Camcar fasteners. Theutilization of shop floor data-collection systemsstreamlines our procedures and provides the mostrelevant data. Also, Camcar has multiple A2LA-accredited labs certified for testing to the FastenerQuality Act.

Acument™ Global Technologies ♦ As part of Acument™, we offer worldwide fastening solutions with sales, manufacturing and engineering facilities in 17 countries. Acument™ sells engineered products to a variety of industries in over 40 countries around the world.

Manufacturing Capacity ♦ As the popularity ofthe STRUX product line expands globally, Camcarcontinues to invest in the highest qualityequipment to help meet your manufacturing needs.Also, all operations are QS-9000 and/or ISO 9000registered.

For more information on any of our products, or design or applications assistance, please contact

us at:

6125 Eighteen Mile Road

Sterling Heights, Michigan 48314 1-800-544-6117

acument.com camcarsolutions.com

ringscrew.com

Distributed By:

STRUX®, Struxtite®, Prevalok®, TORX®, Acupoint™ and Solutions® are trademarks of Acument™ Intellectual Properties, LLC. Taptite® is a registered trademark of Research Engineering Manufacturing Inc. REV: 02/01/07