Matches 1 - 3 out of 3

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US20090003967 LOBULAR DRIVE SYSTEM WITH INTERFERENCE FIT AND METHOD AND APPARATUS FOR FABRICATING SAME  
A fastener which includes a recess that includes a plurality of alternating lobes and recesses, where each of the flutes and lobes is twisted or angled. The fastener can be driven using a...
US20090069103 PUNCH AND RELATED RECESSED SCREW  
The present invention pertains to a punch for forming recessed screw comprising a punch body and a punch head. Particularly, the punch head includes two square portions having different heights...
US20050215333 Screw head punch  
An improved punch to punch socket on the head of a screw that extends the service life of the punch and upgrades the quality of the screw by having a recess formed on one end of the body of the...
Matches 1 - 3 out of 3