5305-00-045-1924 SCREW,MACHINE Index 5330-00-045-1928 PACKING WITH RETAINER

National Stock Number:
5306-00-045-1927

Federal Supply Class:
5306

National Item Identification Number:
000451927

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:
107D3241-177272THE BOEING COMPANY
107D3241-181205THE BOEING COMPANY


Techincal Specification:
FASTENER LENGTH0.724 INCHES MINIMUM AND 0.744 INCHES MAXIMUM
GRIP DIAMETER0.2483 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM
GRIP LENGTH0.218 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
HEAD HEIGHT0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM
HEAD STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR -1L-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 8740 OR STEEL COMP E4340 OVERALL
MINIMUM TENSILE STRENGTH150000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.250 INCHES
PRECIOUS MATERIAL AND LOCATIONOVERALL SILVER
PRECIOUS MATERIALSILVER
WIDTH BETWEEN FLATS0.438 INCHES NOMINAL
SURFACE FINISH80.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH80.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONPV-F-183,FSCM 77272 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTSILVER OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.474 INCHES MINIMUM AND 0.526 INCHES MAXIMUM
THREAD QUANTITY PER INCH28
THREAD SERIES DESIGNATORUNF


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