Part Details | CLOSE TOLERANCE SCREW
5305-01-278-3789 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.
Alternate Parts: ST3M4553L271, ST3M455-3L27-1, HT4024L327, HT4024L3-27, HT4024L327, HT4024L3-27, ST3M4553L271, ST3M455-3L27-1, ST3M4553L27, ST3M455-3L27, HT4024L327, HT4024L3-27, HT4024L327, HT4024L3-27, HT4024L327, HT4024L3-27, HT4024L327, HT4024L3-27, HT4024L327, HT4024L3-27, HT4024L327, HT4024L3-27, 10113634, HT4024L327, HT4024L3-27, HT4024L327, HT4024L3-27, 5305-01-278-3789, 01-278-3789, 5305012783789, 012783789
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | MAY 04, 1988 | 01-278-3789 | 29294 ( SCREW, CLOSE TOLERANCE ) |
REFERENCE DRAWINGS & PICTURES
CROWNED HEXAGON
HIGH-TORQUE
Cross Reference | NSN 5305-01-278-3789
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| ST3M455-3L27-1 | 92215 | ARCONIC GLOBAL FASTENERS & RINGS,INC. |
| HT4024L3-27 | 92215 | ARCONIC GLOBAL FASTENERS & RINGS,INC. |
| HT4024L3-27 | 06950 | ARCONIC GLOBAL FASTENERS & RINGS,INC. |
| ST3M455-3L27-1 | 76301 | BOEING COMPANY, THEDBA BOEING |
| ST3M455-3L27 | 76301 | BOEING COMPANY, THEDBA BOEING |
| HT4024L3-27 | K5676 | CMP PRODUCTS A DIVISION OF BRITISHENGINES LTD |
| HT4024L3-27 | 17419 | DEUTSCH CO THE |
| HT4024L3-27 | 73197 | HI-SHEAR CORPORATION |
| HT4024L3-27 | 17446 | HUCK INTERNATIONAL, INC.DBA ARCONIC FASTENING SYSTEMS AND |
| HT4024L3-27 | 97928 | HUCK INTL INC |
| HT4024L3-27 | L4528 | LISI AEROSPACE CANADA CORPDIV HI SHEAR HOLDINGS INC |
| 10113634 | A486G | NIMIKKEISTOKESKUS NCB FINLAND |
| HT4024L3-27 | K5673 | SPS TECHNOLOGIES LTD TJ BROOKSDIVISION |
| HT4024L3-27 | 80539 | SPS TECHNOLOGIES, LLCDBA AEROSPACE FASTENERS GROUP |
Technical Data | NSN 5305-01-278-3789
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.190 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.319 INCHES MINIMUM AND 0.431 INCHES MAXIMUM |
| FASTENER LENGTH | 2.079 INCHES MINIMUM AND 2.109 INCHES MAXIMUM |
| MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH |
| HEAD STYLE | 6 CROWNED HEXAGON |
| HEAD DIAMETER | 0.297 INCHES MINIMUM AND 0.302 INCHES MAXIMUM |
| HEAD HEIGHT | 0.013 INCHES NOMINAL |
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| INTERNAL DRIVE STYLE | HIGH-TORQUE |
| GRIP LENGTH | 1.678 INCHES MINIMUM AND 1.698 INCHES MAXIMUM |
| GRIP DIAMETER | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM |
| FEATURES PROVIDED | CETYL ALCOHOL LUBRICANT |
| SPECIAL FEATURES | SCREW SUPPLIED WITH MIN. OF 40 PERCENT OF NON-BEARING HEAD SURFACE COATED WITH WHITE PAINT COLOR NO. 37875 PER FED-STD-595 |