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National Stock Number:
5305-01-493-2289
Federal Supply Class:
5305
National Item Identification Number:
014932289
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:
| 003-008913 | 4Y054 | AZTEC PLASTIC CO | | ATS001-25C-12-FHS-L | 4Y054 | AZTEC PLASTIC CO |
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Techincal Specification:
| ASKEWED HEAD ANGLE | 82.0 DEGREES MAXIMUM | | FASTENER LENGTH | 0.750 INCHES NOMINAL | | HEAD STYLE | FLAT COUNTERSUNK | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | INTERNAL DRIVE STYLE | SLOT | | SCREW MATERIAL | PLASTIC POLYAMIDE | | PART NAME ASSIGNED BY CONTROLLING AGENCY | DRAWING NAME: SCREW, MACHINE FLAT HEAD PLASTIC | | PURCHASE DESCRIPTION IDENTIFICATION | 4Y054-003 008913 | | SPECIAL FEATURES | ITEM IS A TORLON COUNTERSUNK FLAT HEAD MACHINE SCREW; MATERIAL: GENERAL-PURPOSE POLYAMIDE-IMIDE (TORLON) GRADE 4203 = EXTRUDED ROD, AND 4203L = INJECTION MOLDED; WORKMANSHIP - SCREWS SHALL SHOW NO EVIDENCE OF CROSS THREADING OR MULTILATION; THREAD LENGTH - FULL FORM THREADS SHALL EXTEND TO WITHIN TWO THREADS OF THE BEARING SURFACE OF THE HEAD OR CLOSER IF PRACTICABLE; MARKING SHALL BE IN ACCORDANCE WITH MIL-STD-130; QUALITY ASSURANCE PROVISIONS | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNC | | THREAD LENGTH | 0.597 INCHES NOMINAL |
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