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National Stock Number:
5305-00-984-1859
Federal Supply Class:
5305
National Item Identification Number:
009841859
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:
| MS21316-37 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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Techincal Specification:
| FASTENER LENGTH | 1.438 INCHES MINIMUM AND 1.562 INCHES MAXIMUM | | HEAD HEIGHT | 0.484 INCHES MINIMUM AND 0.625 INCHES MAXIMUM | | HEAD STYLE | THUMB NO. 3 | | MATERIAL | STEEL OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | POINT STYLE | FLAT | | SHOULDER DIAMETER | 0.430 INCHES MINIMUM AND 0.470 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER LENGTH | 0.050 INCHES MINIMUM AND 0.055 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | WIDTH BETWEEN FLATS | 0.563 INCHES MINIMUM AND 0.635 INCHES MAXIMUM | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.438 INCHES MINIMUM AND 1.562 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNC |
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