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National Stock Number:
5305-00-422-2853
Federal Supply Class:
5305
National Item Identification Number:
004222853
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:
| 306156 | 57712 | TELEMECHANICS INC | | 306156 | 64959 | AMERICAN TELEPHONE AND TELEGRAPH CO | | 306156 | D9182 | ZF INDUSTRIEANTRIEBE WITTEN GMBH |
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Techincal Specification:
| FASTENER LENGTH | 0.375 INCHES NOMINAL | | HEAD HEIGHT | 0.070 INCHES NOMINAL | | HEAD DIAMETER | 0.484 INCHES NOMINAL | | HEAD STYLE | KNURLED NO. 1 | | MATERIAL | STEEL OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT | | POINT STYLE | FLAT | | SPECIAL FEATURES | DRILLED AND THREADED HOLE IN HEADEND,0.138-40UNF X 0.188 INCH DEEP | | SURFACE TREATMENT | OXIDE OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | LEFT-HAND | | THREAD LENGTH | 0.312 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
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