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National Stock Number:
5305-01-022-1948
Federal Supply Class:
5305
National Item Identification Number:
010221948
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:
| 817847-1 | 96214 | RAYTHEON COMPANY |
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Techincal Specification:
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.955 INCHES MINIMUM AND 0.995 INCHES MAXIMUM | | FASTENER LENGTH | 1.355 INCHES MINIMUM AND 1.395 INCHES MAXIMUM | | FIRST DIAMETER FROM HEAD | 0.188 INCHES NOMINAL | | HEAD HEIGHT | 0.625 INCHES NOMINAL | | HEAD STYLE | THUMB NO. 3 | | MATERIAL | STEEL COMP 1141 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPECIAL FEATURES | 0.062 IN. @MIN 0.065 IN. MAX DIA HOLE DRILLED IN EACH WING OF HEAD 0.062 IN. MIN 0.065 IN. MAX DIA HOLE DRILLED IN UNTHREADED SHANK 0.250 IN. FROM BEARING SURFACE OF HEAD | | POINT STYLE | FLAT | | WIDTH BETWEEN FLATS | 1.000 INCHES NOMINAL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.400 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNC |
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