FED-STD-H28/17A, FEDERAL STANDARDS: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES - SECTION 17 - SURVEYING INSTRUMENT MOUNTING THREADS (25 JAN 1985)

FED-STD-H28/17A, FEDERAL STANDARDS: SCREW-THREAD STANDARDS FOR FEDERAL SERVICES - SECTION 17 - SURVEYING INSTRUMENT MOUNTING THREADS (25 JAN 1985)., This section provides the standards for the mating screw threads of the base plate and the tripod head used for securing a surveying instrument to its tripod or other base of support.