NSN 5305-00-139-8178
Part Details | MACHINE SCREW
5305-00-139-8178 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: ABS206424F14, ABS20642-4F14, 5305-00-139-8178, 00-139-8178, 5305001398178, 001398178
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | AUG 18, 1971 | 00-139-8178 | 06657 ( SCREW, MACHINE ) |
REFERENCE DRAWINGS & PICTURES
CROWNED HEXAGON
TORQUE SET
Cross Reference | NSN 5305-00-139-8178
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| ABS20642-4F14 | 02310 | PATTONAIR USA INCUNISEAL DIV |
Technical Data | NSN 5305-00-139-8178
| 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 | 0.291 INCHES MINIMUM AND 0.341 INCHES MAXIMUM |
| FASTENER LENGTH | 1.176 INCHES MINIMUM AND 1.206 INCHES MAXIMUM |
| SCREW MATERIAL | STEEL COMP 8740 |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE |
| SCREW SURFACE TREATMENT | CADMIUM AND CHROMATE |
| SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| HEAD STYLE | 0 CROWNED HEXAGON |
| HEAD DIAMETER | 0.600 INCHES MINIMUM AND 0.666 INCHES MAXIMUM |
| HEAD HEIGHT | 0.097 INCHES NOMINAL |
| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL |
| INTERNAL DRIVE STYLE | TORQUE SET |
| SPECIAL FEATURES | BEARING SURFACE OF HEAD GROOVED TO ACCOMMODATE O-RING AND FURNISHED WITH POLYTETRAFLUOROETHYLENE WASHER & RUBBER O-RING |