5306-01-199-0248 BOLT,INTERNAL WRENCHING Index 5305-01-199-0250 SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-199-0249

Federal Supply Class:
5305

National Item Identification Number:
011990249

Description:
SETSCREW

Detail:
An externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone, or other type of machined point designed to prevent or restrict relative movement of parts and designed to be driven with either a wrench or inserted driver. A locking feature may be incorporated in the design of the head or threads.


Manufacturer Information:
10290819207U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
10290824617GENERAL MOTORS CORP
MS51054-5696906MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M


Techincal Specification:
FASTENER LENGTH1.188 INCHES MINIMUM AND 1.250 INCHES MAXIMUM
FEATURES PROVIDEDCASEHARDENED
HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT0.315 INCHES MINIMUM AND 0.341 INCHES MAXIMUM
HEAD STYLESQUARE
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
MATERIALSTEEL COMP 1010 OR STEEL COMP 1020 OR STEEL COMP 1038 OVERALL
NOMINAL THREAD DIAMETER0.438 INCHES
POINT STYLECUP
SPECIFICATION/STANDARD DATA96906-MS51054 GOVERNMENT STANDARD AND 24617-102908 MANUFACTURERS STANDARD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TYPE 2,CLASS 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH1.045 INCHES MINIMUM AND 1.107 INCHES MAXIMUM
THREAD QUANTITY PER INCH14
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
WIDTH BETWEEN FLATS0.423 INCHES MINIMUM AND 0.438 INCHES MAXIMUM


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