F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/104, 10/37
F16B 33/02 (2006.01)
Patent
CA 1270130
ABSTRACT OF THE DISCLOSURE This invention provides a fastener having a shank with a relatively abrupt transition (34) from an unthreaded portion (33) to a full thread dimension (35), the thread runout (36) occupying no more than one pitch length of the thread in the axial dimension, and circumferentially extending no more than about one- fourth of the circumference of the thread at its pitch diameter. The counter- bore (42) of the nut (29) is reduced in length in light of the short transition section of the shank. The threads are rolled on the shank by opposed dies (55) having ridges (56) complementary to the thread to be produced which run out at one edge of the die with spaced, generally symmetrical end walls (60) which are relatively short axially of the ridges so that the full thread dimension is achieved abruptly.
503661
Huck International Inc.
Ridout & Maybee Llp
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