5305-01-241-0757, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-241-0757

Federal Supply Class:
5305

National Item Identification Number:
012410757

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:

10113572	A486G	NIMIKKEISTOKESKUS NCB FINLAND
HT4020-6-19A	06950	HOWMET GLOBAL FASTENING SYSTEMS INC
HT4020-6-19A	17446	HUCK INTERNATIONAL, INC
HT4020-6-19A	73197	HI-SHEAR CORPORATION
HT4020-6-19A	80539	SPS TECHNOLOGIES, LLC
HT4020-6-19A	92215	HOWMET GLOBAL FASTENING SYSTEMS INC
ST3M652C6-19A	76301	THE BOEING COMPANY
ST3M652C6-19A	92215	HOWMET GLOBAL FASTENING SYSTEMS INC
HT4020-6-19A	97928	HUCK INTL INC
ST3M652C6-19A	K5673	SPS TECHNOLOGIES LTD TJ BROOKS DIVISION
HT4020-6-19A	L4528	LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC

Techincal Specification:

COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH	1.812 INCHES MINIMUM AND 1.859 INCHES MAXIMUM
GRIP DIAMETER	0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM
GRIP LENGTH	1.178 INCHES MINIMUM AND 1.198 INCHES MAXIMUM
HEAD DIAMETER	0.756 INCHES MINIMUM AND 0.760 INCHES MAXIMUM
HEAD HEIGHT	0.115 INCHES MINIMUM AND 0.116 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK UNDERCUT
INTERNAL DRIVE STYLE	HIGH-TORQUE
MATERIAL DOCUMENT AND CLASSIFICATION	AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP XM-13 OVERALL
MINIMUM TENSILE STRENGTH	125000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.375 INCHES
SPECIAL FEATURES	FURNISHED WITH ONE O-RING; CETYL ALCOHOL LUBRICANT
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
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 DIRECTION	RIGHT-HAND
THREAD LENGTH	0.614 INCHES MINIMUM AND 0.681 INCHES MAXIMUM
THREAD QUANTITY PER INCH	24
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)

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