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National Stock Number:
5305-00-143-3222
Federal Supply Class:
5305
National Item Identification Number:
001433222
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:
| A5318811 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| FASTENER LENGTH | 0.765 INCHES MINIMUM AND 0.797 INCHES MAXIMUM | | HEAD HEIGHT | 1.265 INCHES MINIMUM AND 1.297 INCHES MAXIMUM | | HEAD STYLE | WING NO. 4 | | MATERIAL DOCUMENT AND CLASSIFICATION | WD1035 SPEC 57-105 FSCM 19200 MFR REF SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 1035 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | POINT STYLE | FLAT | | SPECIAL FEATURES | DRILLED HOLE 0.109IN. DIAIN THD END FOR TAPER PIN | | WIDTH BETWEEN FLATS | 1.234 INCHES MINIMUM AND 1.266 INCHES MAXIMUM | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.578 INCHES MINIMUM AND 0.610 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNF |
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