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National Stock Number:
5306-01-599-4544
Federal Supply Class:
5306
National Item Identification Number:
015994544
Description:
BOLT,CLOSE TOLERANCE
Detail:
An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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 not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see BOLT, SHEAR. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see BOLT, MACHINE.
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Manufacturer Information:
| 11861E4D21A | 59563 | REID PRODUCTS INC. | | 3M1277E4D21A | 06710 | VALLEY-TODECO, INC. | | 3M1277E4D21A | 0K6Z0 | SATURN FASTENERS INC | | 3M1277E4D21A | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | 3M1277E4D21A | 1EM77 | B & B SPECIALTIES INC | | 3M1277E4D21A | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | TX1027E4D21A | 06725 | SPS TECHNOLOGIES, LLC | | TX1027E4D21A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | TX1027E4D21A | 27624 | SPS TECHNOLOGIES LLC | | 3M1277E4D21A | 4WL75 | CAMCAR LLC DIV CAMCAR LLC | | TX1027E4D21A | 56878 | SPS TECHNOLOGIES, LLC | | 3M1277E4D21A | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | TX1027E4D21A | 73197 | HI-SHEAR CORPORATION | | 3M1277E4D21A | 76301 | THE BOEING COMPANY | | WC1277E4D21A | 60516 | WEST COAST AEROSPACE, INC. | | TX1027E4D21A | 80539 | SPS TECHNOLOGIES, LLC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.425 INCHES NOMINAL | | FASTENER LENGTH | 1.737 INCHES NOMINAL | | MATERIAL | NICKEL ALLOY 718 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-L-87132, TYPE 1, GRADE B MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.3859 INCHES MINIMUM AND | | 0.3948 INCHES MAXIMUM | | COUNTERSINK ANGLE | 90.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | HOLE CONFIGURATION STYLE | ROUND | | HOLE TYPE | DRILLED | | HOLE QUANTITY | 1 | | HOLE DIAMETER | 0.076 INCHES NOMINAL | | GRIP LENGTH | 1.312 INCHES NOMINAL | | GRIP DIAMETER | 0.2648 INCHES MINIMUM AND | | 0.2651 INCHES MAXIMUM |
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