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National Stock Number:
5305-01-310-9996
Federal Supply Class:
5305
National Item Identification Number:
013109996
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:
| 110179-4-6ASM | 80539 | SPS TECHNOLOGIES, LLC | | 110179-4-6ASM | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION | | HT8137-4-6ASM | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BM33024V4-6U | 17446 | HUCK INTERNATIONAL, INC | | HT271A4-6M | 73197 | HI-SHEAR CORPORATION | | HT271A4-6M | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | ST3M430V4-6ASM | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | ST3M430V4-6ASM | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | WC8137-4-6A | 60516 | WEST COAST AEROSPACE, INC. | | ST3M430V4-6ASM | 76301 | THE BOEING COMPANY | | HT8137-4-6ASM | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 0.828 INCHES MINIMUM AND 0.875 INCHES MAXIMUM | | FEATURES PROVIDED | DRY FILM LUBRICANT AND O RING AND CETYL ALCOHOL LUBRICANT | | GRIP LENGTH | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | HEAD DIAMETER | 0.4750 INCHES MINIMUM AND 0.5066 INCHES MAXIMUM | | HEAD HEIGHT | 0.0713 INCHES MINIMUM AND 0.0733 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK UNDERCUT | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE FASTENER | | MATERIAL | TITANIUM ALLOY UNS R56400 FASTENER | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPECIAL FEATURES | FLUORSILICONE RUBBER O-RING,PER MIL-R-25988 TY 1,CL 1,GR 70 | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNJF |
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