Part Details | CLOSE TOLERANCE SCREW
5305-00-498-9718 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.
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| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | OCT 22, 1969 | 00-498-9718 | 29294 ( SCREW, CLOSE TOLERANCE ) |
REFERENCE DRAWINGS & PICTURES
HEXAGON COUNTERSUNK
CROSS RECESS TYPE 1
Cross Reference | NSN 5305-00-498-9718
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| NAS1204-31 | 08938 | AIR INDUSTRIES CO INC |
| NAS1204-31 | 71563 | COLLINS ENGINEERING CORP |
| NAS1204-31 | 82172 | DURHAM AIRCRAFT SERVICE INC |
| NAS1204-31 | 30889 | ERIKS SOUTHWEST INCDBA MONTCLAIR ENTERPRISES |
| NAS1204-31 | 30902 | F AND C SALES INC |
| NAS1204-31 | 73197 | HI-SHEAR CORPORATION |
| NAS1204-31 | 04348 | LAWRENCE ENGINEERING AND SUPPLY INC |
| NAS1204-31 | L4528 | LISI AEROSPACE CANADA CORPDIV HI SHEAR HOLDINGS INC |
| NAS1204-31 | 50569 | MODERN CONTROLS INC |
| NAS1204-31 | 80205 | NATIONAL AEROSPACE STANDARDSCOMMITTEE AEROSPACE INDUSTRIES |
| NAS1204-31 | 07851 | NOR-CAL SUPPLY CO.INC. |
| NAS1204-31 | 56878 | SPS TECHNOLOGIES, LLCDBA AEROSPACE DIVISION |
| NAS1204-31 | 80539 | SPS TECHNOLOGIES, LLCDBA AEROSPACE FASTENERS GROUP |
Technical Data | NSN 5305-00-498-9718
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.291 INCHES MINIMUM AND 0.341 INCHES MAXIMUM |
| FASTENER LENGTH | 2.239 INCHES MINIMUM AND 2.269 INCHES MAXIMUM |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| HEAD STYLE | 0 HEXAGON COUNTERSUNK |
| HEAD DIAMETER | 0.449 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| GRIP LENGTH | 1.928 INCHES MINIMUM AND 1.948 INCHES MAXIMUM |
| GRIP DIAMETER | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |