5305-01-414-7520, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-414-7520

Federal Supply Class:
5305

National Item Identification Number:
014147520

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:

AS292-4-22	84256	AVIBANK MFG., INC.
GB510CG4-22	26512	NORTHROP GRUMMAN SYSTEMS CORPORATION
GB510CG4-22	84256	AVIBANK MFG., INC.

Techincal Specification:

COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH	1.793 INCHES MINIMUM AND 1.813 INCHES MAXIMUM
GRIP DIAMETER	0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM
GRIP LENGTH	1.377 INCHES MINIMUM
HARDNESS RATING	43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM FASTENER
HARDNESS RATING	50.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM SPRING
HEAD DIAMETER	0.449 INCHES MINIMUM AND 0.507 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK
INTERNAL DRIVE STYLE	OFFSET CRUCIFORM (TORQUE SET)
LOCKING FEATURE	DETENT BALL GRIP
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5673 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-W-423, COND B FED SPEC SINGLE MATERIAL RESPONSE SPRING
PART NAME ASSIGNED BY CONTROLLING AGENCY	NAVY SPECIAL PROJECT
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE LOCKING FEATURE
MATERIAL	STEEL COMP 440C LOCKING FEATURE
MATERIAL	STEEL COMP 631 OR STEEL COMP 302 SPRING
MATERIAL	STEEL COMP XM-13 FASTENER
NOMINAL THREAD DIAMETER	0.250 INCHES
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.308 INCHES MINIMUM
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)
THREAD QUANTITY PER INCH	28

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