5305-01-016-5521, SCREW,CAP,SOCKET HEAD

National Stock Number:
5305-01-016-5521

Federal Supply Class:
5305

National Item Identification Number:
010165521

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:

FF-S-86	81348	FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC
MS16995-54B	80205	NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE
MS16995-54B	96906	MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

THREAD SERIES DESIGNATOR	UNC
NOMINAL THREAD DIAMETER	0.250 INCHES
THREAD QUANTITY PER INCH	20
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.960 INCHES MINIMUM
FASTENER LENGTH	1.460 INCHES MINIMUM AND
	1.500 INCHES MAXIMUM
MATERIAL	STEEL COMP 302 OR
	STEEL COMP 304 OR
	STEEL COMP 305 OR
	STEEL COMP 316 OR
	STEEL COMP 384 OR
	STEEL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	66 FED STD 1ST MATERIAL RESPONSE OR
	66 FED STD 2ND MATERIAL RESPONSE OR
	66 FED STD 3RD MATERIAL RESPONSE OR
	66 FED STD 4TH MATERIAL RESPONSE OR
	66 FED STD 5TH MATERIAL RESPONSE OR
	ASTM A493 TYPE XM-7 ASSN STD 6TH MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	OXIDE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-C-13924,CL 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING	80.0 ROCKWELL B MINIMUM OVERALL
MINIMUM TENSILE STRENGTH	80000 POUNDS PER SQUARE INCH
MINIMUM YIELD STRENGTH	30000 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	0.187 INCHES MINIMUM AND
	0.190 INCHES MAXIMUM
NONDEFINITIVE SPEC/STD DATA	6 TYPE
SPEC/STD CONTROLLING DATA
MANUFACTURERS CODE	81348
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	FF-S-86

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