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National Stock Number:
5305-00-638-6307
Federal Supply Class:
5305
National Item Identification Number:
006386307
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:
| SC1015A | 80249 | BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC. |
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Techincal Specification:
| FASTENER LENGTH | 1.000 INCHES NOMINAL | | HEAD DIAMETER | 0.438 INCHES NOMINAL | | HEAD HEIGHT | 0.375 INCHES NOMINAL | | HEAD STYLE | KNURLED NO. 1 | | MATERIAL | STEEL COMP 302 OR STEEL COMP 316 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | POINT LENGTH | 0.094 INCHES NOMINAL | | POINT CHAMFER ANGLE | 120.0 DEGREES NOMINAL | | POINT DIAMETER | 0.189 INCHES NOMINAL | | SHOULDER DIAMETER | 0.234 INCHES NOMINAL FIRST SHOULDER | | SHOULDER LENGTH | 0.031 INCHES NOMINAL FIRST SHOULDER | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.312 INCHES MINIMUM | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNC |
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