At first I thought these were some kind of wild custom tire valve stem caps but then found out these are 8M 1.25 threads. If you recognize these, let me know or buy what you can use and then tell me what they are. 1-7/16 inches long and about 9/16 inch OD at the flange.
MACHINERY'S HANDBOOK 12TH EDITION 1943 FOR MACHINE SHOP AND DRAFTING-ROOM A REFERENCE BOOK ON MACHINE DESIGN AND SHOP PRACTICE FOR THE MECHANICAL ENGINEER, DRAFTSMAN, TOOLMAKER AND MACHINIST by ERIK OBERG AND F D JONES
Ridgid 65790 00-R Pipe Threader Die Head, 1" BSPT, With High Speed RH Dies Features The 00-R style is available in 1/8”, ¼”, 3/8”, ½”, ¾”, and 1”. Current-catalog style. All parts are available and supported by Ridgid.
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