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National Stock Number:
5305-01-128-2481
Federal Supply Class:
5305
National Item Identification Number:
011282481
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:
| 13143689-1 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND | | 13143689-1 | 26772 | WEGO PRECISION MACHINE, INC. | | 13143689-1 | 9X996 | SOUTHLAND PRECISION INC |
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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 | 0.500 INCHES NOMINAL | | FASTENER LENGTH | 10.695 INCHES MINIMUM AND | | 10.815 INCHES MAXIMUM | | MATERIAL | STEEL COMP 303 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | DOUBLE CHAMFER | | HEAD DIAMETER | 0.800 INCHES NOMINAL | | HEAD HEIGHT | 1.000 INCHES NOMINAL | | POINT STYLE | OVAL | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | SHOULDER DIAMETER | 0.625 INCHES NOMINAL FIRST SHOULDER | | SHOULDER LENGTH | 6.840 INCHES MINIMUM AND | | 6.940 INCHES MAXIMUM FIRST SHOULDER | | SPECIAL FEATURES | THREADED AREA 0.120 IN. LG; 5/16-24; 1.120 IN. FROM SHOULDER; MEDIUM DIAMOND KNURL |
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