5306-01-274-0036, BOLT,CLOSE TOLERANCE

National Stock Number:
5306-01-274-0036

Federal Supply Class:
5306

National Item Identification Number:
012740036

Description:
BOLT,CLOSE TOLERANCE

Detail:
An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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 not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see BOLT, SHEAR. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see BOLT, MACHINE.

Manufacturer Information:

SS5116-10-52	78286	SIKORSKY AIRCRAFT CORPORATION
SS5116-10-52	80539	SPS TECHNOLOGIES, LLC
SS5116-10-52	84256	AVIBANK MFG., INC.

Techincal Specification:

THREAD SERIES DESIGNATOR	UNJF
NOMINAL THREAD DIAMETER	0.625 INCHES
THREAD QUANTITY PER INCH	18
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	1.476 INCHES MINIMUM AND
	1.526 INCHES MAXIMUM
FASTENER LENGTH	4.736 INCHES MINIMUM AND
	4.766 INCHES MAXIMUM
MATERIAL	STEEL COMP 303 OR
	STEEL COMP 303MA OR
	STEEL COMP 303PB OR
	STEEL COMP 303 PLUS X OR
	STEEL COMP 303SE POINT
	STEEL COMP 302B OR
	STEEL COMP 304 OR
	STEEL COMP 631 SPRING
	STEEL COMP XM-13 STAND-OFF
	STEEL COMP XM-13 FASTENER
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM A580 ASSN STD 1ST MATERIAL RESPONSE OR
	ASTM A580 ASSN STD 2ND MATERIAL RESPONSE OR
	AMS5678 ASSN STD 3RD MATERIAL RESPONSE SPRING
	AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE STAND-OFF
	AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
SURFACE TREATMENT	PASSIVATE SPRING
	PASSIVATE STAND-OFF
	PASSIVATE FASTENER
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING
	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE STAND-OFF
	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
MINIMUM TENSILE STRENGTH	54800 POUNDS PER SQUARE INCH
HEAD STYLE	DOUBLE HEXAGON EXTENDED WASHER
HEAD HEIGHT	0.608 INCHES MINIMUM AND
	0.628 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.672 INCHES MINIMUM AND
	0.687 INCHES MAXIMUM
EXTENDED WASHER DIAMETER	1.040 INCHES MINIMUM AND
	1.050 INCHES MAXIMUM
EXTENDED WASHER THICKNESS	0.140 INCHES MINIMUM AND
	0.160 INCHES MAXIMUM
GRIP LENGTH	3.240 INCHES MINIMUM AND
	3.260 INCHES MAXIMUM
GRIP DIAMETER	0.623 INCHES MINIMUM AND
	0.624 INCHES MAXIMUM
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
	32.0 MICROINCHES GRIP
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	3.968 INCHES MINIMUM AND
	4.018 INCHES MAXIMUM FIRST HOLE
SHANK UNTHREADED HOLE DIAMETER	0.141 INCHES MINIMUM AND
	0.151 INCHES MAXIMUM FIRST HOLE
SPECIAL FEATURES	SUPPLY WITH DOG TYPE POINT 0.499 IN. MIN AND 0.552 IN. MAX. DIAMETER; 0.537 IN. NOMIANL LENGTH WITH GROOVE PIN MADE OF 300 DERISED CRES PER FED-STD-66; APPLY DRY FILM LUBRICANT TO PAWL/RETAINER
THE MANUFACTURERS DATA
MANUFACTURERS CODE	78286
DESIGN CONTROL REFERENCE	SS5116-10-52

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