5305-00-021-6278, SCREW,CAP,SOCKET HEAD

National Stock Number:
5305-00-021-6278

Federal Supply Class:
5305

National Item Identification Number:
000216278

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:

49637	54123	COLSON CORP THE
FFS86TYPE1STYLE11	81348	FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC

Techincal Specification:

FASTENER LENGTH	0.500 INCHES NOMINAL
HARDNESS RATING	35.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM
HEAD HEIGHT	0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
HEAD STYLE	FLAT CHAMFER
INTERNAL DRIVE STYLE	HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-624,AMEND 2,TY FS FED SPEC ALL MATERIAL RESPONSES OVERALL
MATERIAL	STEEL COMP 2340 OR STEEL COMP 3135 OR STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL
MINIMUM YIELD STRENGTH	140000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.250 INCHES
NONDEFINITIVE SPEC/STD DATA	1 TYPE AND 11 STYLE
WIDTH ACROSS FLATS	0.187 INCHES MINIMUM AND 0.189 INCHES MAXIMUM
SURFACE TREATMENT	CADMIUM OR ZINC OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.500 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH	20

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