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National Stock Number:
5305-01-285-9486
Federal Supply Class:
5305
National Item Identification Number:
012859486
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:
| SC-C-884728 | 80063 | US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR |
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Techincal Specification:
| FASTENER LENGTH | 2.045 INCHES MINIMUM AND 2.055 INCHES MAXIMUM | | HEAD HEIGHT | 0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM | | HEAD STYLE | THUMB NO. 4 | | MATERIAL | STEEL COMP 303 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | POINT STYLE | POINTLESS | | SHOULDER DIAMETER | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER LENGTH | 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | WIDTH BETWEEN FLATS | 1.110 INCHES MINIMUM AND 1.130 INCHES MAXIMUM | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNC |
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