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National Stock Number:
5305-00-232-2849
Federal Supply Class:
5305
National Item Identification Number:
002322849
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:
| 132711-1 | 09205 | LOCKHEED MARTIN CORP ELECTRONICS AND MISSILES DIV |
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Techincal Specification:
| FASTENER LENGTH | 2.380 INCHES NOMINAL | | HARDNESS RATING | 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL | | HEAD DIAMETER | 1.380 INCHES NOMINAL | | HEAD HEIGHT | 0.560 INCHES NOMINAL | | HEAD STYLE | KNURLED NO. 1 | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 COND E MIL SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 4130 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | POINT STYLE | FLAT | | SHOULDER DIAMETER | 0.342 INCHES MINIMUM AND 0.343 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER LENGTH | 2.000 INCHES NOMINAL FIRST SHOULDER | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | SPECIAL FEATURES | BEARING SURFACE OF HEAD UNDERCUT 0.156 IN. DEEP BY 0.870 IN. DIA. | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 3A | | THREAD LENGTH | 0.309 INCHES MINIMUM AND 0.380 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 28 |
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