5305-01-137-7042, SCREW,CAP,SOCKET HEAD

National Stock Number:
5305-01-137-7042

Federal Supply Class:
5305

National Item Identification Number:
011377042

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:

BACF34L4BT2HS	5R793	HOWMET GLOBAL FASTENING SYSTEMS INC
BACF34L4BT2HS	81205	THE BOEING COMPANY
CA21150-4-2HS	29372	HOWMET GLOBAL FASTENING SYSTEMS INC.
BACF34L4BT2HS	8K160	UNIREX, INC.

Techincal Specification:

COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH	0.767 INCHES MINIMUM AND 0.787 INCHES MAXIMUM
HEAD DIAMETER	0.360 INCHES MINIMUM AND 0.404 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK
INTERNAL DRIVE STYLE	HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 8740 OR STEEL COMP 4140 OVERALL
MINIMUM TENSILE STRENGTH	160000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.250 INCHES
SPECIAL FEATURES	THREE SLOTS 0.040 IN. WIDE BY 0.029 IN. DEEP ALONG THE LONGITUDINAL AXIS AND 120 DEGREES APART,THREAD TO BE DOUBLE LEAD
WIDTH ACROSS FLATS	0.1562 INCHES MINIMUM AND 0.1587 INCHES MAXIMUM
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-T-10727 TY1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	TIN OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.477 INCHES MINIMUM AND 0.637 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNF
THREAD QUANTITY PER INCH	28

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