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National Stock Number:
5305-00-991-3187
Federal Supply Class:
5305
National Item Identification Number:
009913187
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:
| 8619176 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| FASTENER LENGTH | 0.968 INCHES MINIMUM AND 1.015 INCHES MAXIMUM | | HEAD DIAMETER | 0.985 INCHES MINIMUM AND 1.016 INCHES MAXIMUM | | HEAD HEIGHT | 0.235 INCHES MINIMUM AND 0.266 INCHES MAXIMUM | | HEAD STYLE | KNURLED NO. 1 | | MATERIAL | STEEL COMP 303 OR STEEL COMP 304 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | POINT STYLE | POINTLESS | | SHOULDER DIAMETER | 0.515 INCHES MINIMUM AND 0.531 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER LENGTH | 0.187 INCHES MINIMUM AND 0.234 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924,CL 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | OXIDE OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.765 INCHES MINIMUM AND 0.797 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNF |
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