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National Stock Number:
5305-01-021-6846
Federal Supply Class:
5305
National Item Identification Number:
010216846
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:
| 10114859 | A486G | NIMIKKEISTOKESKUS NCB FINLAND | | 11909V4L3-1 | 59563 | REID PRODUCTS INC. | | HT4028L4-3 | 06725 | SPS TECHNOLOGIES, LLC | | HT4028L4-3 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4028L4-3 | 17446 | HUCK INTERNATIONAL, INC | | HT4028L4-3 | 27624 | SPS TECHNOLOGIES LLC | | HT4028L4-3 | 56878 | SPS TECHNOLOGIES, LLC | | HT4028L4-3 | 73197 | HI-SHEAR CORPORATION | | HT4028L4-3 | 80539 | SPS TECHNOLOGIES, LLC | | HT4028L4-3 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4028L4-3 | 97928 | HUCK INTL INC | | HT4028L4-3 | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION | | HT4028L4-3 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | ST3M466V4L3-1 | 0K6Z0 | SATURN FASTENERS INC | | ST3M466V4L3-1 | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | ST3M466V4L3-1 | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | ST3M466V4L3-1 | 4WL75 | CAMCAR LLC DIV CAMCAR LLC | | ST3M466V4L3-1 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M466V4L3-1 | 76301 | THE BOEING COMPANY | | ST3M466V4L3-1 | K8753 | LINREAD NORTHBRIDGE AIRCRAFT PRODUCT DIVISION | | WC4028L4-3 | 60516 | WEST COAST AEROSPACE, INC. |
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Techincal Specification:
| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | FASTENER LENGTH | 0.642 INCHES MINIMUM AND 0.672 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM | | HEAD DIAMETER | 0.389 INCHES MINIMUM AND 0.394 INCHES MAXIMUM | | HEAD STYLE | OVAL COUNTERSUNK | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL | TITANIUM ALLOY OVERALL | | PROPRIETARY CHARACTERISTICS | PACS | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNJF |
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