Part Details | MACHINE SCREW
5305-01-143-0249 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: MS5195981B, MS51959-81B, 3421917000, 342-1917-000, 5305-01-143-0249, 01-143-0249, 5305011430249, 011430249
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | NOV 24, 1982 | 01-143-0249 | 06657 ( SCREW, MACHINE ) |
REFERENCE DRAWINGS & PICTURES
DISHED HEXAGON
CROSS RECESS TYPE 1
Cross Reference | NSN 5305-01-143-0249
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| MS51959-81B | 96906 | MILITARY STANDARDSPROMULGATED BY MILITARY DEPARTMENTS |
| 342-1917-000 | 13499 | ROCKWELL COLLINS, INC.DBA GOVERNMENT SYSTEMS |
Technical Data | NSN 5305-01-143-0249
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.750 INCHES NOMINAL |
| FASTENER LENGTH | 0.750 INCHES NOMINAL |
| SCREW MATERIAL | 2$3$4$5$DST0316 |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE |
| SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924 CLASS 4 MIL SPEC SINGLE TREATMENT RESPONSE |
| MINIMUM TENSILE STRENGTH | 80000 POUNDS PER SQUARE INCH |
| HEAD STYLE | 9 DISHED HEXAGON |
| HEAD DIAMETER | 0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
| COUNTERSINK ANGLE | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |