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National Stock Number:
5305-00-721-3411
Federal Supply Class:
5305
National Item Identification Number:
007213411
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:
| 9053574 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
| FASTENER LENGTH | 1.375 INCHES NOMINAL | | HEAD DIAMETER | 0.500 INCHES NOMINAL | | HEAD HEIGHT | 0.219 INCHES NOMINAL | | HEAD STYLE | KNURLED NO. 1 | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 416SE OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | POINT DIAMETER | 0.178 INCHES MINIMUM AND 0.183 INCHES MAXIMUM | | POINT LENGTH | 0.625 INCHES NOMINAL | | POINT STYLE | BALL | | SPECIAL FEATURES | UNDERCUT UNTHREADED PORTION ON 0.195 IN.TO 0.200 IN.DIA 0.375 IN.LG AND STRAIGHT KNURLED,19 TEETH PER IN. | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.375 INCHES MINIMUM | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNF |
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