Part Details | CLOSE TOLERANCE SCREW
5305-01-259-1198 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: NAS640416, NAS6404-16, 5305-01-259-1198, 01-259-1198, 5305012591198, 012591198
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | JUL 13, 1987 | 01-259-1198 | 29294 ( SCREW, CLOSE TOLERANCE ) |
REFERENCE DRAWINGS & PICTURES
DISHED HEXAGON
CROSS RECESS TYPE II
Cross Reference | NSN 5305-01-259-1198
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| NAS6404-16 | 80205 | NATIONAL AEROSPACE STANDARDSCOMMITTEE AEROSPACE INDUSTRIES |
Technical Data | NSN 5305-01-259-1198
| 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 | 0.370 INCHES NOMINAL |
| FASTENER LENGTH | 1.355 INCHES MINIMUM AND 1.385 INCHES MAXIMUM |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| SINGLE SHEAR STRENGTH | 95000 POUNDS PER SQUARE INCH |
| HEAD STYLE | DISHED HEXAGON |
| HEAD HEIGHT | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.429 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | 1 CROSS RECESS TYPE II |
| GRIP LENGTH | 0.990 INCHES MINIMUM AND 1.000 INCHES MAXIMUM |
| GRIP DIAMETER | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NAS6404 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |