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National Stock Number:
5305-01-174-0519
Federal Supply Class:
5305
National Item Identification Number:
011740519
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:
| CA21166-4-2 | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. | | FIT7833-4-2 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | GS522Y4-2 | 26512 | NORTHROP GRUMMAN SYSTEMS CORPORATION |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.487 INCHES NOMINAL | | FASTENER LENGTH | 1.059 INCHES NOMINAL | | MATERIAL | STEEL COMP 302B OR | | STEEL COMP 303 OR | | STEEL COMP 303 PLUS X OR | | STEEL COMP 303SE OR | | STEEL COMP 303CU OR | | STEEL COMP 303MA OR | | STEEL COMP 304 OR | | STEEL COMP 304L TOP OF HEAD | | STEEL COMP 8740 OR | | STEEL COMP 4140 FASTENER | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OR | | MIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE FASTENER | | SURFACE TREATMENT | PASSIVATE TOP OF HEAD | | CADMIUM AND | | CHROMATE FASTENER | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE TOP OF HEAD | | QQ-P-416 TY 2 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE FASTENER | | HEAD STYLE | THUMB NO. 6 | | HEAD HEIGHT | 0.625 INCHES NOMINAL | | WIDTH BETWEEN FLATS | 0.076 INCHES MINIMUM AND | | 0.079 INCHES MAXIMUM | | POINT STYLE | POINTLESS | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | SHOULDER DIAMETER | 0.247 INCHES MINIMUM AND | | 0.249 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER LENGTH | 0.150 INCHES MINIMUM AND | | 0.290 INCHES MAXIMUM FIRST SHOULDER | | SPECIAL FEATURES | 0.112 DIA HOLE FOR PLUG AT THREADED END,0.035 IN. TO 0.045 IN. WIDE BY 0.024 IN. TO 0.034 IN. DEEP SPLINE 3 PLACES,SPACED 120 DEGREES APART |
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