Part Details | CLOSE TOLERANCE SCREW
5305-01-284-8378 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: C7985528, C7985-5-28, VT1694F528, VT1694F5-28, VT1694F528, VT1694F5-28, H185528, H185-5-28, C7985528, C7985-5-28, C7985528, C7985-5-28, 1215585A28P, 121558-5-A28P, 1215585A28P, 121558-5-A28P, AIC985528, AIC985-5-28, PBF1166528, PBF1166-5-28, 5305-01-284-8378, 01-284-8378, 5305012848378, 012848378
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | SEP 01, 1988 | 01-284-8378 | 29294 ( SCREW, CLOSE TOLERANCE ) |
REFERENCE DRAWINGS & PICTURES
HEXAGON COUNTERSUNK
OFFSET CRUCIFORM (TORQUE SET)
Cross Reference | NSN 5305-01-284-8378
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| C7985-5-28 | 06950 | ARCONIC GLOBAL FASTENERS & RINGS,INC. |
| VT1694F5-28 | 92215 | ARCONIC GLOBAL FASTENERS & RINGS,INC. |
| VT1694F5-28 | 06950 | ARCONIC GLOBAL FASTENERS & RINGS,INC. |
| H185-5-28 | 17446 | HUCK INTERNATIONAL, INC.DBA ARCONIC FASTENING SYSTEMS AND |
| C7985-5-28 | 81755 | LOCKHEED MARTIN CORPORATIONDBA LOCKHEED MARTIN AERONAUTICS |
| C7985-5-28 | 56878 | SPS TECHNOLOGIES, LLCDBA AEROSPACE DIVISION |
| 121558-5-A28P | 56878 | SPS TECHNOLOGIES, LLCDBA AEROSPACE DIVISION |
| 121558-5-A28P | 80539 | SPS TECHNOLOGIES, LLCDBA AEROSPACE FASTENERS GROUP |
| AIC985-5-28 | 06725 | SPS TECHNOLOGIES, LLCDBA AIR INDUSTRIES |
| PBF1166-5-28 | 27624 | SPS TECHNOLOGIES, LLCDBA PB FASTENERS |
Technical Data | NSN 5305-01-284-8378
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.501 INCHES NOMINAL |
| FASTENER LENGTH | 2.251 INCHES NOMINAL |
| HEAD STYLE | 0 HEXAGON COUNTERSUNK |
| HEAD DIAMETER | 0.429 INCHES MINIMUM AND 0.479 INCHES MAXIMUM |
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) |
| GRIP LENGTH | 1.750 INCHES NOMINAL |
| GRIP DIAMETER | 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM |