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National Stock Number: 5305-00-811-4493
Federal Supply Class: 5305
National Item Identification Number: 008114493
Description: SCREW,MACHINE
Detail: An externally threaded fastener whose threaded portion is of one nominal diameter, No 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below No. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; and SCREW, ASSEMBLED WASHER. See also, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; and SCREW, CAP SOCKET HEAD.
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Manufacturer Information:
9055755 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
FASTENER LENGTH | 0.250 INCHES NOMINAL | HEAD DIAMETER | 0.174 INCHES MINIMUM AND 0.176 INCHES MAXIMUM | HEAD HEIGHT | 0.066 INCHES MINIMUM AND 0.070 INCHES MAXIMUM | HEAD STYLE | FILLISTER | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | MINIMUM TENSILE STRENGTH | 115000 POUNDS PER SQUARE INCH | NOMINAL THREAD DIAMETER | 0.112 INCHES | SCREW MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE | SCREW MATERIAL | STEEL COMP 303 | SCREW SURFACE TREATMENT | PASSIVATE | THREAD LENGTH | 0.250 INCHES MAXIMUM | THREAD CLASS | 2A | THREAD DIRECTION | RIGHT-HAND | THREAD SERIES DESIGNATOR | UNC | THREAD QUANTITY PER INCH | 40 |
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