Part Details | MACHINE SCREW
5305-01-383-2506 An externally threaded fastener whose threaded portion is of one nominal diameter, No 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below No. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; and SCREW, ASSEMBLED WASHER. See also, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; and SCREW, CAP SOCKET HEAD.
Alternate Parts: 023792, 02379-2, 5305-01-383-2506, 01-383-2506, 5305013832506, 013832506
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | NOV 19, 1993 | 01-383-2506 | 06657 ( SCREW, MACHINE ) |
REFERENCE DRAWINGS & PICTURES
DISHED HEXAGON
CROSS RECESS TYPE 1
ROUND
Cross Reference | NSN 5305-01-383-2506
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 02379-2 | 14153 | DEFENSE LOGISTICS AGENCYDBA DEFENSE SUPPLY CENTER |
Technical Data | NSN 5305-01-383-2506
| 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 | 0.438 INCHES MAXIMUM |
| FASTENER LENGTH | 0.438 INCHES NOMINAL |
| SCREW MATERIAL | STEEL COMP 8740 |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| HEAD STYLE | 8 DISHED HEXAGON |
| HEAD DIAMETER | 0.389 INCHES MINIMUM AND 0.414 INCHES MAXIMUM |
| HEAD HEIGHT | 0.266 INCHES NOMINAL |
| INTERNAL DRIVE STYLE | 0 CROSS RECESS TYPE 1 |
| HEAD HOLE CONFIGURATION STYLE | ROUND |
| HOLE QUANTITY | 2 |
| HOLE DIAMETER | 0.070 INCHES NOMINAL |
| BEARING SURFACE OF HEAD SURFACE FINISH | 63.0 MICROINCHES |
| THREAD SURFACE FINISH | 32.0 MICROINCHES |
| SPECIAL FEATURES | THREAD IS SAFETY CRITICAL PER MIL-S-7742 UNDER APPLICATION CATEGORY SAFETY CRITICAL. APPLY ONE COAT OF MIL-P-23377, TY 1, CL 1 OR 3 AND TWO TOP COATS OF MIL-C-46168, COLOR CODE 33538 PER FED-STD-595 TO TOP OF HEAD |
| CRITICALITY CODE JUSTIFICATION | THSD |