5305-01-625-0888, SCREW,CLOSE TOLERANCE

6150-01-624-6938 CABLE ASSEMBLY,POWER,ELECTRICAL

National Stock Number:
5305-01-625-0888

Federal Supply Class:
5305

National Item Identification Number:
016250888

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:

NAS8605D18

80205

NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE

Techincal Specification:

COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH	1.548 INCHES MINIMUM AND 1.578 INCHES MAXIMUM
GRIP DIAMETER	0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM
GRIP LENGTH	1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM
HEAD DIAMETER	0.429 INCHES MINIMUM AND 0.477 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK
INTERNAL DRIVE STYLE	CRUCIFORM RIBBED
MATERIAL DOCUMENT AND CLASSIFICATION	AMS6382 ASSN STD 1ST MATERIAL RESPONSE OR AMS6415 ASSN STD 2ND MATERIAL RESPONSE OR AMS6484 ASSN STD 2ND MATERIAL RESPONSE OR AMS6322 ASSN STD 3RD MATERIAL RESPONSE OR AMS6325 ASSN STD 3RD MATERIAL RESPONSE OR AMS6327 ASSN STD 3RD MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8740 OVERALL
NOMINAL THREAD DIAMETER	0.3125 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM ALL HOLES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	AMS-QQ-P-416, TYPE 2, CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.438 INCHES NOMINAL
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)
THREAD QUANTITY PER INCH	24

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