5305-00-121-7745, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-00-121-7745

Federal Supply Class:
5305

National Item Identification Number:
001217745

Description:
SCREW,CLOSE TOLERANCE

Detail:
A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

Manufacturer Information:

7S32-3A12H

43999

THE BOEING COMPANY

Techincal Specification:

FASTENER LENGTH	1.073 INCHES MINIMUM AND 1.103 INCHES MAXIMUM
GRIP DIAMETER	0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM
GRIP LENGTH	0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM
HEAD DIAMETER	0.306 INCHES MINIMUM AND 0.313 INCHES MAXIMUM
HEAD HEIGHT	0.103 INCHES MINIMUM AND 0.118 INCHES MAXIMUM
HEAD STYLE	FLAT CHAMFER
HOLE CONFIGURATION STYLE	ROUND
HOLE DIAMETER	0.046 INCHES NOMINAL
HOLE TYPE	DRILLED
INTERNAL DRIVE STYLE	OFFSET CRUCIFORM (TORQUE SET)
LOCKING FEATURE	PELLET OR STRIP OR PATCH THREADS
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-6758,COND D4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 4130 OVERALL
MINIMUM TENSILE STRENGTH	160000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.190 INCHES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM AND CHROMATE OVERALL
THREAD CLASS	3A
THREAD LENGTH	0.313 INCHES MINIMUM AND 0.363 INCHES MAXIMUM
THREAD DIRECTION	RIGHT-HAND
THREAD SERIES DESIGNATOR	UNF
THREAD QUANTITY PER INCH	32

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