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National Stock Number:
5305-00-726-1009
Federal Supply Class:
5305
National Item Identification Number:
007261009
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:
| C295290-1 | 06845 | RAYTHEON COMPANY |
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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 | 0.550 INCHES MINIMUM AND | | 0.570 INCHES MAXIMUM | | FASTENER LENGTH | 0.700 INCHES MINIMUM AND | | 0.740 INCHES MAXIMUM | | MATERIAL | STEEL COMP 303 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | HEAD STYLE | KNURLED NO. 1 | | HEAD DIAMETER | 0.740 INCHES MINIMUM AND | | 0.760 INCHES MAXIMUM | | HEAD HEIGHT | 0.150 INCHES MINIMUM AND | | 0.170 INCHES MAXIMUM | | POINT STYLE | FLAT | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | SHOULDER DIAMETER | 0.430 INCHES MINIMUM AND | | 0.450 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER LENGTH | 0.130 INCHES MINIMUM AND | | 0.190 INCHES MAXIMUM FIRST SHOULDER |
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