5306-01-419-3321, BOLT,CLOSE TOLERANCE

National Stock Number:
5306-01-419-3321

Federal Supply Class:
5306

National Item Identification Number:
014193321

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:

S4928913-7-21

88277

THE BOEING COMPANY

Techincal Specification:

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	DPS 9.74 TY 1, CAGE 88277 MFR REF SINGLE TREATMENT RESPONSE THREADS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	DPS 9.74 TY 1, CAGE 88277 MFR REF SINGLE TREATMENT RESPONSE TOP OF HEAD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	DPS 9.84 TY 1, CAGE 88277 MFR REF SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	DPS 9.84 TY 1, CAGE 88277 MFR REF SINGLE TREATMENT RESPONSE GRIP
SURFACE TREATMENT	CADMIUM SIDES OF HEAD
SURFACE TREATMENT	CADMIUM THREADS
SURFACE TREATMENT	CADMIUM TOP OF HEAD
SURFACE TREATMENT	CHROMIUM BEARING SURFACE OF HEAD
SURFACE TREATMENT	CHROMIUM GRIP
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.453 INCHES NOMINAL
THREAD QUANTITY PER INCH	20
THREAD SERIES DESIGNATOR	UNF
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	1.631 INCHES MINIMUM ALL HOLES AND 1.651 INCHES MAXIMUM ALL HOLES
FASTENER LENGTH	1.750 INCHES MINIMUM AND 1.780 INCHES MAXIMUM
GRIP DIAMETER	0.4358 INCHES MINIMUM AND 0.4367 INCHES MAXIMUM
GRIP LENGTH	1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM
HEAD HEIGHT	0.219 INCHES MINIMUM AND 0.234 INCHES MAXIMUM
HEAD STYLE	DISHED HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OVERALL OR MIL-S-5626 MIL SPEC 2ND MATERIAL RESPONSE OVERALL OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OVERALL OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP E4340 OVERALL OR STEEL COMP 4140 OVERALL OR STEEL COMP 8740 OVERALL OR STEEL COMP 8735 OVERALL
PROPRIETARY CHARACTERISTICS	PACS
MINIMUM TENSILE STRENGTH	95000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.438 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.106 INCHES MINIMUM ALL HOLES AND 0.116 INCHES MAXIMUM ALL HOLES
SPECIAL FEATURES	TWO PERPENDICULAR COTTER-PIN HOLES.
WIDTH BETWEEN FLATS	0.679 INCHES MINIMUM AND 0.690 INCHES MAXIMUM
SURFACE FINISH	63.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH	63.0 MICROINCHES GRIP
SURFACE FINISH	32.0 MICROINCHES THREADS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	DPS 9.74 TY 1, CAGE 88277 MFR REF SINGLE TREATMENT RESPONSE SIDES OF HEAD

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