5305-01-145-8394, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-145-8394

Federal Supply Class:
5305

National Item Identification Number:
011458394

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:

AS205-12-27	84256	AVIBANK MFG., INC.
GB511DW12-27	26512	NORTHROP GRUMMAN SYSTEMS CORPORATION

Techincal Specification:

DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	2.503 INCHES MINIMUM AND 2.519 INCHES MAXIMUM FIRST HOLE
FASTENER LENGTH	2.701 INCHES MINIMUM AND 2.717 INCHES MAXIMUM
GRIP DIAMETER	0.7486 INCHES MINIMUM AND 0.7491 INCHES MAXIMUM
GRIP LENGTH	1.688 INCHES MINIMUM AND 1.704 INCHES MAXIMUM
HARDNESS RATING	38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM FASTENER
HEAD HEIGHT	0.376 INCHES MINIMUM AND 0.391 INCHES MAXIMUM
HEAD STYLE	CROWNED HEXAGON
INTERNAL DRIVE STYLE	SLOT
LOCKING FEATURE	DETENT BALL GRIP
MATERIAL DOCUMENT AND CLASSIFICATION	AMS5678 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A580 COND. A ASSN STD 2ND MATERIAL RESPONSE SPRING
MATERIAL	STEEL COMP 630 FASTENER
MATERIAL	STEEL COMP 631 OR STEEL COMP 302 SPRING
MINIMUM TENSILE STRENGTH	170000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.750 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.141 INCHES MINIMUM AND 0.151 INCHES MAXIMUM FIRST HOLE
WIDTH BETWEEN FLATS	1.052 INCHES MINIMUM AND 1.064 INCHES MAXIMUM
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 FASTENER
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING
SURFACE TREATMENT	PASSIVATE FASTENER
SURFACE TREATMENT	PASSIVATE SPRING
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.997 INCHES MINIMUM AND 1.029 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNJF
THREAD QUANTITY PER INCH	16

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