公开(公告)号：US3648560A

公开(公告)日：1972-03-14

申请号：US3648560D

申请日：1970-06-09

Applicant: KEYSTONE CONSOLIDATED IND INC

Inventor： ROSER KENNETH L

IPC: F16B25/10 ,  F16B25/00

CPC classification number: F16B25/106 ,  F16B25/0021 ,  F16B25/0084 ,  F16B25/10

Abstract: A self-extruding screw used for thin gage sheet metal to provide increased holding power, with the screw having an enlarged head, a threaded shank and a generally tapered thread-free point with a flattened side parallel the screw axis extending from adjacent the base of the conical tip to a point short of the threaded shank. An angular groove is formed in the tapered point to extend therearound, partially interrupted by the flattened surface, from adjacent the conical tip to and merging into the threads of the shank.

Abstract translation: 用于薄规格金属片的自挤压螺钉，以提供更大的保持力，螺钉具有扩大的头部，螺纹柄和大致锥形的无螺纹点，平坦的一侧平行于从相邻的基部 锥形尖端到不到螺纹柄的点。 在锥形点处形成有一角度的凹槽，以在其周围延伸，部分地被扁平表面中断，从邻近的锥形尖端延伸到并且并入到柄的螺纹中。