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National Stock Number:
5305-99-168-7040
Federal Supply Class:
5305
National Item Identification Number:
991687040
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:
| BLT 5048 | K0378 | ROLLS-ROYCE PLC | | BLT5048 | K0378 | ROLLS-ROYCE PLC |
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Techincal Specification:
| BEARING SURFACE OF HEAD SURFACE FINISH | 0.8 MICROMETERS | | FASTENER LENGTH | 9.50 MILLIMETERS NOMINAL | | HEAD HEIGHT | 3.71 MILLIMETERS MINIMUM AND 4.21 MILLIMETERS MAXIMUM | | HEAD HOLE CONFIGURATION STYLE | HEXAGON FLATS | | HEAD STYLE | HEXAGON | | HOLE DIAMETER | 1.60 MILLIMETERS NOMINAL | | HOLE QUANTITY | 1 | | INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SCREW MATERIAL DOCUMENT AND CLASSIFICATION | U1653 -HR60 MFR REF SINGLE MATERIAL RESPONSE | | SCREW MATERIAL | NICKEL ALLOY | | SCREW SURFACE TREATMENT | SILVER | | SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | K0379-DTD 939 GOVERNMENT STD/SPEC SINGLE TREATMENT RESPONSE | | SPECIAL FEATURES | SURFACE TEXTURE AND LOCATION: 3.2 MICRONS TOP OF HEAD | | WIDTH BETWEEN FLATS | 10.92 MILLIMETERS MINIMUM AND 11.15 MILLIMETERS MAXIMUM | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 7.25 MILLIMETERS NOMINAL | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNF | | THREAD SURFACE FINISH | 0.8 MICROMETERS |
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