5305-01-218-1458, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-218-1458

Federal Supply Class:
5305

National Item Identification Number:
012181458

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:

AS292-4-15	84256	AVIBANK MFG., INC.
GB510CG415	26512	NORTHROP GRUMMAN SYSTEMS CORPORATION
GB510CG415	27624	SPS TECHNOLOGIES LLC
GB510CG415	56878	SPS TECHNOLOGIES, LLC
GB510CG415	73197	HI-SHEAR CORPORATION
GB510CG415	92215	HOWMET GLOBAL FASTENING SYSTEMS INC
GB510CG415	L4528	LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC

Techincal Specification:

DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	1.361 INCHES MINIMUM AND 1.381 INCHES MAXIMUM FIRST HOLE
COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH	1.356 INCHES MINIMUM AND 1.376 INCHES MAXIMUM
GRIP DIAMETER	0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM
GRIP LENGTH	1.048 INCHES MINIMUM AND 1.079 INCHES MAXIMUM
HARDNESS RATING	43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM OVERALL
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 OVERALL
MATERIAL	STEEL COMP XM-13 OVERALL
MINIMUM TENSILE STRENGTH	63000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.250 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE
SPECIAL FEATURES	INTERNAL DRIVE RIBBED
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 LENGTH	0.277 INCHES MINIMUM AND 0.328 INCHES MAXIMUM
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD SERIES DESIGNATOR	UNJF
THREAD QUANTITY PER INCH	28

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