5305-00-612-3659, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-00-612-3659

Federal Supply Class:
5305

National Item Identification Number:
006123659

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:

202-15501-16	80378	TRIUMPH AEROSTRUCTURES, LLC
AS-111-04-16	84256	AVIBANK MFG., INC.
CA4750-04-16	29372	HOWMET GLOBAL FASTENING SYSTEMS INC.

Techincal Specification:

DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	1.323 INCHES MINIMUM AND 1.343 INCHES MAXIMUM FIRST HOLE
COUNTERSINK ANGLE	100.0 DEGREES NOMINAL
FASTENER LENGTH	1.418 INCHES MINIMUM AND 1.438 INCHES MAXIMUM
GRIP DIAMETER	0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM
GRIP LENGTH	1.110 INCHES MINIMUM AND 1.125 INCHES MAXIMUM
HARDNESS RATING	40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	0.449 INCHES MINIMUM AND 0.502 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK
INTERNAL DRIVE STYLE	OFFSET CRUCIFORM (TORQUE SET)
LOCKING FEATURE	DETENT BALL GRIP
MATERIAL	STEEL COMP 8740 OR STEEL COMP E4340 OR STEEL COMP 4340 OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE
SPECIAL FEATURES	RETAINING ELEMENT IN THREADS
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY2 CL3 FED SPEC SINGLE TREATMENT RESPONSE THREADS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY2 CL3 FED SPEC SINGLE TREATMENT RESPONSE HEAD
SURFACE TREATMENT	CADMIUM AND CHROMATE HEAD
SURFACE TREATMENT	CADMIUM AND CHROMATE THREADS
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.293 INCHES MINIMUM AND 0.328 INCHES MAXIMUM
THREAD QUANTITY PER INCH	28
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)

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