Part Details | MACHINE BOLT
5306-00-639-4278 An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, BOLT, SHEAR. See also SCREW, CAP, HEXAGON HEAD and SCREW, MACHINE.
Alternate Parts: 275779, 275779, 275779, 5306-00-639-4278, 00-639-4278, 5306006394278, 006394278
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | JAN 01, 1963 | 00-639-4278 | 01847 ( BOLT, MACHINE ) |
REFERENCE DRAWINGS & PICTURES
DOUBLE HEXAGON EXTENDED WASHER
DOUBLE HEXAGON LONGITUDINAL HOLE
Cross Reference | NSN 5306-00-639-4278
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 275779 | S0254 | KITO MFG CO. LTD |
| 275779 | 77445 | UNITED TECHNOLOGIES CORPORATIONDBA PRATT WHITNEY-SPARE PARTS |
| 275779 | 0EEG3 | VALCO COGOVERNMENT SALES OFFICE |
Technical Data | NSN 5306-00-639-4278
| Characteristic | Specifications |
|---|---|
| HEAD STYLE | DOUBLE HEXAGON EXTENDED WASHER |
| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| NONSTANDARD THREAD PITCH DIAMETER | +0.2213 TO +0.2238 INCHES |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.669 INCHES MINIMUM AND 0.740 INCHES MAXIMUM |
| FASTENER LENGTH | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM |
| HEAD HEIGHT | 0.320 INCHES MINIMUM AND 0.340 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.304 INCHES MINIMUM AND 0.313 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM |
| HOLE CONFIGURATION STYLE | DOUBLE HEXAGON LONGITUDINAL HOLE |
| HOLE TYPE | DRILLED |
| HOLE QUANTITY | 4 |
| HOLE DIAMETER | 0.065 INCHES NOMINAL |
| FEATURES PROVIDED | FINISHED HEAD |
| PRECIOUS MATERIAL | SILVER |