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National Stock Number:
5305-00-569-0457
Federal Supply Class:
5305
National Item Identification Number:
005690457
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:
| A458-922 | 15280 | NORTHROP GRUMMAN SYSTEMS CORPORATION DIV ES DEFENSIVE SYSTEMS DIVISION | | A458-922 | 26916 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | A458-922 | 55631 | SCOMILL INC |
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Techincal Specification:
| FASTENER LENGTH | 1.375 INCHES NOMINAL | | HEAD DIAMETER | 0.250 INCHES NOMINAL | | HEAD HEIGHT | 0.312 INCHES NOMINAL | | HEAD STYLE | KNURLED NO. 1 | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-7720 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-18732 MIL SPEC 2ND MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 303 OR STEEL COMP 303SE OVERALL | | NOMINAL THREAD DIAMETER | 0.112 INCHES | | POINT STYLE | FLAT | | SHOULDER DIAMETER | 0.188 INCHES NOMINAL FIRST SHOULDER | | SHOULDER LENGTH | 0.250 INCHES NOMINAL FIRST SHOULDER | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 2A | | THREAD LENGTH | 0.875 INCHES MINIMUM | | THREAD QUANTITY PER INCH | 40 | | THREAD SERIES DESIGNATOR | UNC |
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