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National Stock Number:
5305-01-160-4508
Federal Supply Class:
5305
National Item Identification Number:
011604508
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:
| SM-C-852090-1 | 80063 | US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNC | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.380 INCHES NOMINAL | | FASTENER LENGTH | 1.350 INCHES NOMINAL | | MATERIAL | STEEL COMP 303 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | OXIDE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924 CL 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | KNURLED NO. 1 | | HEAD DIAMETER | 0.980 INCHES MINIMUM AND | | 1.020 INCHES MAXIMUM | | HEAD HEIGHT | 0.250 INCHES NOMINAL | | POINT STYLE | FLAT | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | SHOULDER DIAMETER | 0.500 INCHES NOMINAL FIRST SHOULDER | | SHOULDER LENGTH | 0.250 INCHES NOMINAL FIRST SHOULDER | | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 | | FIRST DIAMETER FROM HEAD | 0.170 INCHES MINIMUM AND | | 0.175 INCHES MAXIMUM | | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.720 INCHES NOMINAL | | SPECIAL FEATURES | DIAMOND KNURLED HEAD; COLOR BLACK |
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