5305-01-043-7715, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-043-7715

Federal Supply Class:
5305

National Item Identification Number:
010437715

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:

76121-4-3	56878	SPS TECHNOLOGIES, LLC
76121-4-3	80539	SPS TECHNOLOGIES, LLC
BM19047C4H3	17446	HUCK INTERNATIONAL, INC
GB510BF4-3	26512	NORTHROP GRUMMAN SYSTEMS CORPORATION
BM19047C4H3	97928	HUCK INTL INC

Techincal Specification:

COUNTERSINK ANGLE	100.0 DEGREES NOMINAL
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM FIRST HOLE
GRIP DIAMETER	0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
GRIP LENGTH	0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM
HARDNESS RATING	36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	0.350 INCHES MINIMUM AND 0.398 INCHES MAXIMUM
INTERNAL DRIVE STYLE	HIGH-TORQUE
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	IRON ALLOY 660 OVERALL
MINIMUM TENSILE STRENGTH	160000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.250 INCHES
PART NAME ASSIGNED BY CONTROLLING AGENCY	NAVY SPECIAL PROJECT
SHANK UNTHREADED HOLE DIAMETER	0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE
SPECIFICATION/STANDARD DATA	26512-GB510B MANUFACTURERS STANDARD
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE FINISH	32.0 MICROINCHES THREADS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
THREAD CLASS	3A
THREAD SERIES DESIGNATOR	UNJF
THREAD QUANTITY PER INCH	28

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