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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:
| FASTENER LENGTH | 1.000 INCHES NOMINAL | | HEAD DIAMETER | 0.500 INCHES NOMINAL | | HEAD HEIGHT | 0.250 INCHES NOMINAL | | HEAD STYLE | DOUBLE CHAMFER | | 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 | | MATERIAL | STEEL COMP 316 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | POINT STYLE | FLAT | | SHOULDER DIAMETER | 0.375 INCHES NOMINAL FIRST SHOULDER | | SHOULDER LENGTH | 0.370 INCHES NOMINAL FIRST SHOULDER | | SHOULDER SHAPE | ROUND 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 | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35,TY 1,TY 2,TY 3,TY 6 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.530 INCHES MINIMUM AND 0.630 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNC |
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