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National Stock Number:
5305-01-265-3357
Federal Supply Class:
5305
National Item Identification Number:
012653357
Description:
SCREW,CLOSE TOLERANCE
Detail:
A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.
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Manufacturer Information:
| 167A800-009 | 01289 | GENERAL ELECTRIC COMPANY DBA GE DIV GE-AVIATION GEAR PLANT | | 167A800-009 | 17454 | TIMKEN GEARS & SERVICES INC. | | 167A800-9 | 01289 | GENERAL ELECTRIC COMPANY DBA GE DIV GE-AVIATION GEAR PLANT | | 167A800-9 | 17454 | TIMKEN GEARS & SERVICES INC. |
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Techincal Specification:
| FASTENER LENGTH | 3.000 INCHES NOMINAL | | GRIP DIAMETER | 0.7495 INCHES MINIMUM AND 0.7505 INCHES MAXIMUM | | GRIP LENGTH | 1.720 INCHES NOMINAL | | HARDNESS RATING | 25.0 ROCKWELL C MINIMUM OVERALL AND 34.0 ROCKWELL C MAXIMUM OVERALL | | HEAD DIAMETER | 1.120 INCHES NOMINAL | | HEAD HEIGHT | 0.760 INCHES NOMINAL | | HEAD STYLE | FLAT CHAMFER | | INTERNAL DRIVE STYLE | HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A193 GRADE B16 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL OVERALL | | PROPRIETARY CHARACTERISTICS | PACS | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | MINIMUM YIELD STRENGTH | 105000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.750 INCHES | | SPECIAL FEATURES | FURNISHED WITH TWO UNDERCUTS | | WIDTH ACROSS FLATS | 0.625 INCHES MINIMUM AND 0.634 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.000 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 16 | | THREAD SERIES DESIGNATOR | UNF |
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