5305-00-143-2037 SCREW,MACHINE Index 5306-00-143-2039 BOLT,MACHINE

National Stock Number:
5305-00-143-2038

Federal Supply Class:
5305

National Item Identification Number:
001432038

Description:
SCREW,CLOSE TOLERANCE

Detail:
A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (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 designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.


Manufacturer Information:
3MA335CFA506725SPS TECHNOLOGIES, LLC
3MA335CFA506950HOWMET GLOBAL FASTENING SYSTEMS INC
3MA335CFA576301THE BOEING COMPANY
3MA335CFA577545REED AND PRINCE MFG CO
3MFRA335CFA576301THE BOEING COMPANY


Techincal Specification:
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM
GRIP LENGTH0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM
GRIP DIAMETER0.3108 INCHES MINIMUM AND 0.3117 INCHES MAXIMUM
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM
HEAD STYLEFLAT COUNTERSUNK
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OR AMS 6300 ASSN STD 6TH MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 4037 OVERALL
MINIMUM TENSILE STRENGTH160000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.312 INCHES
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,C 3 FED SPEC 1ST TREATMENT RESPONSE OR P.S. 13421,FSCM 76301 MFR REF 2ND TREATMENT RESPONSE HEAD
SURFACE TREATMENTCADMIUM AND CHROMATE OR PRIMER HEAD
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.505 INCHES MINIMUM AND 0.572 INCHES MAXIMUM
THREAD QUANTITY PER INCH24
THREAD SERIES DESIGNATORUNF


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