5330-00-003-4108 SEAL ASSEMBLY Index 5306-00-003-4110 BOLT,CLOSE TOLERANCE

National Stock Number:
5306-00-003-4109

Federal Supply Class:
5306

National Item Identification Number:
000034109

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:
106467-5-2880539SPS TECHNOLOGIES, LLC
AC194-5-2884256AVIBANK MFG., INC.
CA4510-5-2829372HOWMET GLOBAL FASTENING SYSTEMS INC.
SS27576-5-2878286SIKORSKY AIRCRAFT CORPORATION
MS27576-5-2880205NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE
MS27576-5-2896906MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M


Techincal Specification:
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER2.113 INCHES MINIMUM AND 2.143 INCHES MAXIMUM FIRST HOLE
FASTENER LENGTH2.228 INCHES MINIMUM AND 2.228 INCHES MINIMUM AND 2.248 INCHES MAXIMUM2.248 INCHES MAXIMUM
GRIP DIAMETER0.3108 INCHES MINIMUM AND 0.3108 INCHES MINIMUM AND 0.3117 INCHES MAXIMUM0.3117 INCHES MAXIMUM
GRIP LENGTH1.750 INCHES MINIMUM AND 1.766 INCHES MAXIMUM
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 41.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT0.157 INCHES MINIMUM AND 0.157 INCHES MINIMUM AND 0.172 INCHES MAXIMUM0.172 INCHES MAXIMUM
HEAD STYLEDISHED HEXAGONDISHED HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-83050 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
NOMINAL THREAD DIAMETER0.312 INCHES
SHANK UNTHREADED HOLE DIAMETER0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE
SPECIAL FEATURESW/RETAINING ELEMENT ON SHANK
SURFACE FINISH63.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH63.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY 2 CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
THREAD CLASS3A3A
THREAD DIRECTIONRIGHT-HANDRIGHT-HAND
THREAD LENGTH0.311 INCHES MINIMUM AND 0.311 INCHES MINIMUM AND 0.378 INCHES MAXIMUM0.378 INCHES MAXIMUM
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF)
THREAD QUANTITY PER INCH24
WIDTH BETWEEN FLATS0.492 INCHES MINIMUM AND 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM


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