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National Stock Number:
5305-00-844-5483
Federal Supply Class:
5305
National Item Identification Number:
008445483
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:
| 90179D578 | 39428 | MCMASTER-CARR SUPPLY CO | | MS21316-43 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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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 | 0.358 INCHES MINIMUM AND | | 0.469 INCHES MAXIMUM | | FASTENER LENGTH | 0.469 INCHES MINIMUM AND | | 0.531 INCHES MAXIMUM | | MATERIAL | STEEL OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND | | CHROMATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | THUMB NO. 3 | | HEAD HEIGHT | 0.710 INCHES MINIMUM AND | | 0.790 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.650 INCHES MINIMUM AND | | 0.790 INCHES MAXIMUM | | POINT STYLE | FLAT | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | SHOULDER DIAMETER | 0.550 INCHES MINIMUM AND | | 0.590 INCHES MAXIMUM FIRST SHOULDER | | SPEC/STD CONTROLLING DATA | | | MANUFACTURERS CODE | 96906 | | DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS21316-43 |
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