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National Stock Number:
5305-99-765-8060
Federal Supply Class:
5305
National Item Identification Number:
997658060
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:
| B490396 | K0378 | ROLLS-ROYCE PLC |
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Techincal Specification:
| BEARING SURFACE OF HEAD SURFACE FINISH | 125.0 MICROINCHES | | CRITICALITY CODE JUSTIFICATION | FEAT | | FASTENER LENGTH | 1.070 INCHES NOMINAL | | HARDNESS RATING | 225.0 BRINELL STANDARD MINIMUM AND 321.0 BRINELL STANDARD MAXIMUM | | HEAD HEIGHT | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM | | HEAD STYLE | SQUARE | | MINIMUM TENSILE STRENGTH | 880 NEWTONS PER SQUARE MILLIMETER | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SCREW MATERIAL DOCUMENT AND CLASSIFICATION | K7766-BS 1449 PART 1A HR 650 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE | | SCREW MATERIAL | STEEL | | SPECIAL FEATURES | MAJOR THREAD DIA 0.2435 IN. MIN,0.2480 IN. MAX; 125 MICROINCHES HD OVERALL | | WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.320 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 28 | | THREAD SURFACE FINISH | 125.0 MICROINCHES | | THREAD SERIES DESIGNATOR | UNJF |
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