5305-01-440-4891, SCREW,CAP,SOCKET HEAD

National Stock Number:
5305-01-440-4891

Federal Supply Class:
5305

National Item Identification Number:
014404891

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:

1/4-20UNC3A QQN -281D CL A OR B	D9182	ZF INDUSTRIEANTRIEBE WITTEN GMBH
N-999-6064-B-001 ITEM NO. 44	10941	CARVER PUMP COMPANY

Techincal Specification:

FASTENER LENGTH	0.625 INCHES NOMINAL
HARDNESS RATING	39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	0.365 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-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	NICKEL ALLOY K-500 OVERALL
MINIMUM YIELD STRENGTH	155000 POUNDS PER SQUARE INCH
MINIMUM TENSILE STRENGTH	180000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.250 INCHES
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.525 INCHES MINIMUM AND 0.625 INCHES MAXIMUM
THREAD QUANTITY PER INCH	20
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)
WIDTH ACROSS FLATS	0.188 INCHES NOMINAL

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