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: (Screw)

:(Helix)

(screw thread)

(external thread),(internal thread)

(pitch)

(lead)

,,,

(right hand thread),(left hand thread)

(single thread),(multiple thread)

(angle of thread)

(complete thread)

(incomplete thread)

(effective thread)

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: (Screw)

(metric thread) :mm (inch thread) :(inch),(1 inch)

(unified thread, 60),(whitworth thread, 55)

(fine thread)

(pipe thread) :

4(square thread) :() (acme thread)

(buttress thread) :

(round thread)

(ball thread) :

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: (Screw) :

,

30

120

,

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: (Screw)

,,,

2 M20 X 2 - 2

(mm) :,X

M18, M15 X 1.5

() :,,, TM 206

() :,,

- 15 UNF

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: (Screw)

(set screw)

(key)

(machine screw)

(wood screw)

(lock nut)

(split pin)

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