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National Stock Number:
5305-01-216-3995
Federal Supply Class:
5305
National Item Identification Number:
012163995
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:
| 810AS2298 | 30003 | NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER | | 810AS2298 | 98752 | WARNER ROBINS AIR LOGISTICS CENTER |
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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 | 0.530 INCHES MINIMUM AND | | 0.630 INCHES MAXIMUM | | FASTENER LENGTH | 1.000 INCHES NOMINAL | | MATERIAL | STEEL COMP 316 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5059, COND A MIL SPEC SINGLE MATERIAL RESPONSE OR | | QQ-S-763, COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35,TY 1,TY 2,TY 3,TY 6 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | DOUBLE CHAMFER | | HEAD DIAMETER | 0.500 INCHES NOMINAL | | HEAD HEIGHT | 0.250 INCHES NOMINAL | | POINT STYLE | FLAT | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | SHOULDER DIAMETER | 0.375 INCHES NOMINAL FIRST SHOULDER | | SHOULDER LENGTH | 0.370 INCHES NOMINAL FIRST SHOULDER | | SPECIAL FEATURES | MEDIUM STRAIGHT KNURL ON HEAD; 0.062 IN. GROOVE IN SHOULDER, 0.125 IN. DISTANCE FROM END ADJOINTING THE THREADS; 0.112-40UNC-2B THREADED HOLE BY 0.250 IN. DEEP IN CENTER OF HEAD |
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