5305-01-286-9781, SCREW,CAP,SOCKET HEAD

National Stock Number:
5305-01-286-9781

Federal Supply Class:
5305

National Item Identification Number:
012869781

Description:
SCREW,CAP,SOCKET HEAD

Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW, SHOULDER; and SCREW, MACHINE.

Manufacturer Information:

5305012869781	A00AM	E.C.A ETABLISSEMENT CENTRAL DESAPPROVISIONNEMENTS DES FORCES ARMEE
FF-S-86	81348	FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC
MS16998-50L	96906	MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

MINIMUM TENSILE STRENGTH	160000 POUNDS PER SQUARE INCH
MINIMUM YIELD STRENGTH	155000 POUNDS PER SQUARE INCH
HEAD STYLE	FLAT CHAMFER
HEAD DIAMETER	0.365 INCHES MINIMUM AND
	0.375 INCHES MAXIMUM
HEAD HEIGHT	0.244 INCHES MINIMUM AND
	0.250 INCHES MAXIMUM
INTERNAL DRIVE STYLE	HEXAGON
WIDTH ACROSS FLATS	0.188 INCHES MINIMUM AND
	0.190 INCHES MAXIMUM
LOCKING FEATURE	PATCH OR
	STRIP THREADS
NONDEFINITIVE SPEC/STD DATA	6 TYPE
SPEC/STD CONTROLLING DATA
MANUFACTURERS CODE	81348
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	FF-S-86
MANUFACTURERS CODE	96906
DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	MS16998-50L
THREAD SERIES DESIGNATOR	UNF
NOMINAL THREAD DIAMETER	0.250 INCHES
THREAD QUANTITY PER INCH	28
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	1.210 INCHES MINIMUM AND
	1.500 INCHES MAXIMUM
FASTENER LENGTH	2.210 INCHES MINIMUM AND
	2.250 INCHES MAXIMUM
MATERIAL	PLASTIC POLYAMIDE LOCKING FEATURE
	STEEL FASTENER
SURFACE TREATMENT	CADMIUM AND
	CHROMATE FASTENER
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OR
	MIL-C-81562 TY 2 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE FASTENER
HARDNESS RATING	39.0 ROCKWELL C MINIMUM AND
	45.0 ROCKWELL C MAXIMUM FASTENER

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