Screw-Thread Standards for Federal Services Section 23 Class 5 Interference-Fit Screw Threads

Amended by

FED-STD-H28-23 Notice 4 - Validation:2019

Available format(s)

PDF

Published date

01-20-1989

Publisher

US Military Specs/Standards/Handbooks

Gives general purpose Class 5 interference-fit screw threads of modified National thread form in the Coarse Series (NC) for sizes 0.250 to 1.500 inches. Also provided are Naval specifications special applications. Interference-fit threads are intended to sufficient breakloose torques to prevent loosening of externally threaded parts in use where other, less costly methods are unsatisfactory.

DevelopmentNote	NOTICE 1 - Notice of Validation. NOTICE 2 - Notice of Validation. (09/2001) NOTICE 3 - Notice of Validation. (08/2006)
DocumentType	Standard
Pages	13
ProductNote	NEW CHILD NOT 4 2019 IS NOW ADDED.
PublisherName	US Military Specs/Standards/Handbooks
Status	Current

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ASME B1.12 : 1987	CLASS 5 INTERFERENCE-FIT THREAD
FED-STD-H28-1 Revision A:1985	SCREW THREAD STANDARDS FOR FEDERAL SERVICES, SECTION 1, NOMENCLATURE, DEFINITIONS AND LETTER SYMBOLS FOR SCREW THREADS
FED-STD-H28-20 Revision B:1994	SCREW THREAD STANDARDS FOR FEDERAL SERVICES, SECTION 20, INSPECTION METHODS FOR ACCEPTABILITY OF UN, UNR, UNJ, M, AND MJ SCREW THREADS
FED-STD-H28-6 Revision A:1978	SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 6 GAGES AND GAGING FOR UNIFIED SCREW THREADS-UN AND UNR THREAD FORMS