https://everyspec.com/FED-STD/FED-STD-H28_13_57156/
FED-STD-H28 13 SCREW-THREAD STANDARDS FEDERAL SERVICES 13
Title: FED-STD-H28 13, Date: 1978-Aug-31, Status: Active, Desc: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 13 STUB ACME THREADS (31-AUG-1978)
screw thread standardsfedstdservices