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National Stock Number:
5305-99-607-6329
Federal Supply Class:
5305
National Item Identification Number:
996076329
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:
| BLT4731 | K0378 | ROLLS-ROYCE PLC |
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Techincal Specification:
| BEARING SURFACE OF HEAD SURFACE FINISH | 0.8 MICROMETERS | | FASTENER LENGTH | 9.25 MILLIMETERS MINIMUM AND 9.75 MILLIMETERS MAXIMUM | | HEAD HEIGHT | 3.71 MILLIMETERS MINIMUM AND 4.21 MILLIMETERS MAXIMUM | | HEAD STYLE | HEXAGON | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SCREW MATERIAL DOCUMENT AND CLASSIFICATION | K0680-HR601 DEF STAN/SPEC SINGLE MATERIAL RESPONSE | | SCREW MATERIAL | STEEL | | SCREW SURFACE TREATMENT | SILVER | | SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | K0379-DTD 939 DEF STAN/SPEC SINGLE TREATMENT RESPONSE | | SPECIAL FEATURES | MATERIAL STEEL,ROLLS ROYCE (1971)LTD HR601; NOT CASEHARDENED; TOP OF HEAD SURFACE TEXTURE 3.2 MICRONS | | WIDTH BETWEEN FLATS | 10.92 MILLIMETERS MINIMUM AND 11.15 MILLIMETERS MAXIMUM | | SUPPLEMENTARY FEATURES | SURFACE FINISH AND LOCATION IN MICRONS THREADS 3.2; BEARING SURFACE OF HEAD 0.8; TOP OF HEAD 3.2 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 9.25 MILLIMETERS MINIMUM AND 9.75 MILLIMETERS MAXIMUM | | THREAD QUANTITY PER INCH | 28 | | THREAD SURFACE FINISH | 3.2 MICROMETERS | | THREAD SERIES DESIGNATOR | UNJF |
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