Threaded fastener having minimized length and weight and...

F - Mech Eng,Light,Heat,Weapons – 16 – B

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85/104, 10/30

F16B 25/00 (2006.01) B21H 3/02 (2006.01) F16B 31/02 (2006.01) F16B 33/02 (2006.01) F16B 35/04 (2006.01)

Patent

CA 1251962

2599-134 ABSTRACT OF THE DISCLOSURE A threaded fastener has a pin with a head, a cylindrical shank, a shoulder with reducing diameter, a radius at the least diameter of the shoulder whose region is work-hardened, and a threaded end, in that order. The thread extends into near-adja- cency to the shoulder, and has no more than approximately one-half of a convolution of an incomplete thread at its end adjacent to the shoulder. A collar is threadable onto the thread. It has a counterbore no longer than the anticipated grip range plus approxi- mately one-half of a thread pitch. The collar may be inherently torque-limited. The term "thread" also includes a peripheral groove. 2175

418914

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