5306-00-479-0255 BOLT,SHEAR Index 5306-00-479-0261 BOLT,CLOSE TOLERANCE

National Stock Number:
5306-00-479-0260

Federal Supply Class:
5306

National Item Identification Number:
004790260

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:
11797A04U01259563REID PRODUCTS INC.
68484-4A01256878SPS TECHNOLOGIES, LLC
AIC2263A04U01206725SPS TECHNOLOGIES, LLC
BM3200-4A01217446HUCK INTERNATIONAL, INC
68484-4A1256878SPS TECHNOLOGIES, LLC
68484-4A1280539SPS TECHNOLOGIES, LLC
VAL23611-4D01206710VALLEY-TODECO, INC.
VS2978A04U01206950HOWMET GLOBAL FASTENING SYSTEMS INC
PBF1041A4U01227624SPS TECHNOLOGIES LLC
STSBG000A04U01256878SPS TECHNOLOGIES, LLC
STSBG000A04U01292215HOWMET GLOBAL FASTENING SYSTEMS INC
VS2978A04U01292215HOWMET GLOBAL FASTENING SYSTEMS INC
BM3200-4A01297928HUCK INTL INC
STSBG000A04U01298897LOCKHEED MARTIN CORP


Techincal Specification:
FASTENER LENGTH1.027 INCHES MINIMUM AND 1.074 INCHES MAXIMUM
GRIP DIAMETER0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
GRIP LENGTH0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM
HEAD HEIGHT0.164 INCHES NOMINAL
HEAD STYLEDOUBLE HEXAGON
MATERIALSTEEL COMP H11 OVERALL
MINIMUM TENSILE STRENGTH132000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.250 INCHES
WIDTH BETWEEN FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM
SURFACE FINISH32.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONSTSBS000 FSCM 98897 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTNICKEL AND CADMIUM AND CHROMATE OVERALL
THREAD CLASS3A
THREAD LENGTH0.267 INCHES MINIMUM AND 0.334 INCHES MAXIMUM
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH28
THREAD SERIES DESIGNATORUNJF


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