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National Stock Number:
5306-01-311-3450
Federal Supply Class:
5306
National Item Identification Number:
013113450
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:
| 02554 | 14153 | DEFENSE LOGISTICS AGENCY DBA DEFENSE SUPPLY CENTER PHILADELPHIA | | 8936411-01 | 06725 | SPS TECHNOLOGIES, LLC | | 8936411-01 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 8936411-01 | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | 8936411-01 | 14153 | DEFENSE LOGISTICS AGENCY DBA DEFENSE SUPPLY CENTER PHILADELPHIA | | 8936411-01 | 1EM77 | B & B SPECIALTIES INC | | 8936411-01 | 27624 | SPS TECHNOLOGIES LLC | | 8936411-01 | 27970 | PANAMETRICS LLC | | 8936411-01 | 56878 | SPS TECHNOLOGIES, LLC | | 8936411-01 | 62384 | LFC INDUSTRIES INC. | | 8936411-01 | 66841 | PRECI-MANUFACTURING, INCORPORATED | | 8936411-01 | 80539 | SPS TECHNOLOGIES, LLC | | 8936411-01 | 97499 | BELL TEXTRON INC | | 8936411-01 | 98752 | WARNER ROBINS AIR LOGISTICS CENTER |
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Techincal Specification:
| CRITICALITY CODE JUSTIFICATION | FEAT | | FASTENER LENGTH | 2.015 INCHES MINIMUM AND 2.062 INCHES MAXIMUM | | GRIP DIAMETER | 0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM | | GRIP LENGTH | 1.546 INCHES MINIMUM AND 1.608 INCHES MAXIMUM | | HEAD HEIGHT | 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM | | HEAD STYLE | HEXAGON | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPECIAL FEATURES | SAFETY CRITICAL ITEM. APPLY ONE COAT OF MIL-P-23377, TY 1, CL 1 OR 3 AND TWO TOP COATS OF MIL-C-46168, COLOR CODE 33538 PER FED-STD-595 TO TOP OF HEAD | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.469 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 28 | | WIDTH BETWEEN FLATS | 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM |
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