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National Stock Number:
5305-01-474-3541
Federal Supply Class:
5305
National Item Identification Number:
014743541
Description:
THUMBSCREW
Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter. It may have an unthreaded portion with a diameter less than, equal to, or greater than the diameter of the threaded portion. It has either a vertically flattened, circular knurled, or wing type head, all of which are designed for rotation by the thumb and fingers. For items having wrenching facilities such as socket recess, multiple spline or slot heads, use SCREW (as modified) or BOLT (as modified).
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Manufacturer Information:
| A1-32415D | 14850 | ARMY, UNITED STATES DEPARTMENT OF THE DBA DIORECTORATE OF PRODUCTION ENGINEERING DIV TOBYHANNA ARMY DEPOT | | SM-C-415027 | 80063 | US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNC | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | THREAD QUANTITY PER INCH | 18 | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.328 INCHES NOMINAL | | FASTENER LENGTH | 2.370 INCHES NOMINAL | | MATERIAL | STEEL COMP 630 OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | HARDNESS RATING | 34.0 ROCKWELL C MINIMUM AND | | 38.0 ROCKWELL C MAXIMUM THREADS | | HEAD STYLE | THUMB NO. 3 | | HEAD HEIGHT | 0.880 INCHES NOMINAL | | WIDTH BETWEEN FLATS | 1.500 INCHES NOMINAL | | SPECIAL FEATURES | ITEM SHALL WITHSTAND A MINIMUM TORQUE OF 500 IN-LBS IN ALL PLANES; HAS TWO DRILLED HOLES IN HEAD WITH THE DIAMETER OF 0.188 INCH, 1-INCH BETWEEN HOLE CENTERS |
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