Part Details | CLOSE TOLERANCE BOLT
5306-01-027-5249 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.
Alternate Parts: VS3060418, VS3060-4-18, VS3060418, VS3060-4-18, ST3M571418, ST3M571-4-18, GS1030418, GS1030-4-18, ST3M571418, ST3M571-4-18, ST3M571418, ST3M571-4-18, ST3M571418, ST3M571-4-18, MB84418, MB84-4-18, ST3M571418, ST3M571-4-18, BM3326418, BM3326-4-18, S371418, S371-4-18, ST3M571418, ST3M571-4-18, ST3M571418, ST3M571-4-18, 11831418, 11831-4-18, ST3M571418, ST3M571-4-18, S111059418, S11-1059-4-18, ST3M571418, ST3M571-4-18, 74328418, 74328-4-18, ST3M571418, ST3M571-4-18, 74328418, 74328-4-18, ST3M571418, ST3M571-4-18, AIC752418, AIC752-4-18, ST3M571418, ST3M571-4-18, ST3M571418, ST3M571-4-18, VAL23033418, VAL23033-4-18, ST3M571418, ST3M571-4-18, 5306-01-027-5249, 01-027-5249, 5306010275249, 010275249
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | SEP 18, 1976 | 01-027-5249 | 27851 ( BOLT, CLOSE TOLERANCE ) |
REFERENCE DRAWINGS & PICTURES
HEXAGON
Cross Reference | NSN 5306-01-027-5249
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| VS3060-4-18 | 92215 | ARCONIC GLOBAL FASTENERS & RINGS,INC. |
| VS3060-4-18 | 06950 | ARCONIC GLOBAL FASTENERS & RINGS,INC. |
| ST3M571-4-18 | 92215 | ARCONIC GLOBAL FASTENERS & RINGS,INC. |
| GS1030-4-18 | 1EM77 | B & B SPECIALTIES INC.DBA G S AEROSPACE DIVISION DIV GS |
| ST3M571-4-18 | 76301 | BOEING COMPANY, THEDBA BOEING |
| ST3M571-4-18 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC.DBA F I T |
| ST3M571-4-18 | 0ZC92 | HEARTLAND PRECISION FASTENERS, INC. |
| MB84-4-18 | 73197 | HI-SHEAR CORPORATION |
| ST3M571-4-18 | 73197 | HI-SHEAR CORPORATION |
| BM3326-4-18 | 97928 | HUCK INTL INC |
| S371-4-18 | 97928 | HUCK INTL INC |
| ST3M571-4-18 | 0JV78 | J M PRECISION INC |
| ST3M571-4-18 | L4528 | LISI AEROSPACE CANADA CORPDIV HI SHEAR HOLDINGS INC |
| 11831-4-18 | 59563 | REID PRODUCTS INC.DBA REID PRODUCTS |
| ST3M571-4-18 | 0K6Z0 | SATURN FASTENERS INCDIV ACUMENT |
| S11-1059-4-18 | 57928 | SONIC INDUSTRIES INC. |
| ST3M571-4-18 | 57928 | SONIC INDUSTRIES INC. |
| 74328-4-18 | 56878 | SPS TECHNOLOGIES, LLCDBA AEROSPACE DIVISION |
| ST3M571-4-18 | 56878 | SPS TECHNOLOGIES, LLCDBA AEROSPACE DIVISION |
| 74328-4-18 | 80539 | SPS TECHNOLOGIES, LLCDBA AEROSPACE FASTENERS GROUP |
| ST3M571-4-18 | 80539 | SPS TECHNOLOGIES, LLCDBA AEROSPACE FASTENERS GROUP |
| AIC752-4-18 | 06725 | SPS TECHNOLOGIES, LLCDBA AIR INDUSTRIES |
| ST3M571-4-18 | 06725 | SPS TECHNOLOGIES, LLCDBA AIR INDUSTRIES |
| ST3M571-4-18 | 27624 | SPS TECHNOLOGIES, LLCDBA PB FASTENERS |
| VAL23033-4-18 | 06710 | VALLEY-TODECO, INC.DBA ARCONIC FASTENING SYSTEMS AND |
| ST3M571-4-18 | 06710 | VALLEY-TODECO, INC.DBA ARCONIC FASTENING SYSTEMS AND |
Technical Data | NSN 5306-01-027-5249
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.443 INCHES MINIMUM AND 0.493 INCHES MAXIMUM |
| FASTENER LENGTH | 1.578 INCHES MINIMUM AND 1.608 INCHES MAXIMUM |
| HEAD STYLE | 0 HEXAGON |
| HEAD HEIGHT | 0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.304 INCHES MINIMUM AND 0.313 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.059 INCHES MINIMUM AND 0.079 INCHES MAXIMUM |
| GRIP LENGTH | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM |
| GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |