5305-00-551-0142, SCREW,CAP,SOCKET HEAD

National Stock Number:
5305-00-551-0142

Federal Supply Class:
5305

National Item Identification Number:
005510142

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.

Techincal Specification:

FASTENER LENGTH	1.250 INCHES NOMINAL
HARDNESS RATING	36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	0.553 INCHES MINIMUM AND 0.562 INCHES MAXIMUM
HEAD HEIGHT	0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM
HEAD STYLE	FLAT CHAMFER
INTERNAL DRIVE STYLE	HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL
MATERIAL	STEEL COMP 4135 OR STEEL COMP 4137 OR STEEL COMP 8640 OVERALL
MINIMUM YIELD STRENGTH	140000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.375 INCHES
NONDEFINITIVE SPEC/STD DATA	1 TYPE AND 11 STYLE
WIDTH ACROSS FLATS	0.312 INCHES MINIMUM AND 0.315 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-Z-325,TYPE 2,CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
SURFACE TREATMENT	ZINC AND CHROMATE OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	1.250 INCHES NOMINAL
THREAD QUANTITY PER INCH	16
THREAD SERIES DESIGNATOR	UNC

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