5305-01-443-8436, SCREW,TAPPING

National Stock Number:
5305-01-443-8436

Federal Supply Class:
5305

National Item Identification Number:
014438436

Description:
SCREW,TAPPING

Detail:
A hardened externally threaded fastener whose thread extends to the bearing surface of the head. The thread may be fluted or otherwise designed to cut or form its own mating thread. Excludes SCREW, ASSEMBLED WASHER.

Manufacturer Information:

12377969-1	19207	U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
FF-S-107	81348	FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC

Techincal Specification:

NONMACHINE THREAD STYLE	DOUBLE FLUTE (TYPE F)
NONMACHINE NOMINAL THREAD DIAMETER	0.312 INCHES
FASTENER LENGTH	0.470 INCHES NOMINAL
MATERIAL	STEEL COMP 1020 OR
	STEEL COMP 1021 OR
	STEEL COMP 1022 OR
	STEEL COMP 1023 OR
	STEEL COMP 1524 OVERALL
SURFACE TREATMENT	ZINC AND
	CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	ASTM B633 TY 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING	45.0 ROCKWELL C MINIMUM AND
	50.0 ROCKWELL C MAXIMUM OVERALL
HEAD STYLE	HEXAGON EXTENDED WASHER
HEAD HEIGHT	0.264 INCHES NOMINAL
WIDTH BETWEEN FLATS	0.500 INCHES NOMINAL
EXTENDED WASHER DIAMETER	0.624 INCHES MINIMUM AND
	0.676 INCHES MAXIMUM
EXTENDED WASHER THICKNESS	0.035 INCHES MINIMUM AND
	0.055 INCHES MAXIMUM
INTERNAL DRIVE STYLE	W/O INTERNAL DRIVE
FEATURES PROVIDED	CASEHARDENED
NONDEFINITIVE SPEC/STD DATA	F TYPE
SPEC/STD CONTROLLING DATA
MANUFACTURERS CODE	81348
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	FF-S-107

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