Cap Screw Markings
Cap Screw Markings
(OP)
Could any one point me to an online refernce giving who manufactured a given cap screw by the letters marked on the fastener head (I have a screw that is marked only " T U Z ", and I cannot find who made it). Thanks, drew





RE: Cap Screw Markings
Mil specs are available free on a website. I don't have details, but there have been other threads on on-line availability of MIL specs rtry FAQ or Search function.
RE: Cap Screw Markings
RE: Cap Screw Markings
http://assist.daps.dla.mil/quicksearch/
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Cap Screw Markings
Take a look at Google and search for "headmarks".
RE: Cap Screw Markings
Also, is there a reference that lists company specific headmarkings, ie.. TUZ= So and So company...??
RE: Cap Screw Markings
Yes, there are publications that list company headmarkings. One of them was provided above by yates (MIL-HDBK-57) and is available at the URL I provided above.
Another is published by the Industrial Fasteners Institute and is available here:
http://www.industrial-fasteners.org/metric/index.html
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Cap Screw Markings
RE: Cap Screw Markings
http://www.uspto.gov/web/offices/tac/fqa/fqa.htm
Most bolts can be ordered with a black oxide finish. If it has no markings other than the brand,I would consider it a Grade 2.
RE: Cap Screw Markings
Title: IDENTIFICATION SYMBOLS FOR AEROSPACE FASTENER MANUFACTURERS at:
http://assist.daps.dla.mil/docimages/0001/59/31/1291A.PD3