Part Details | MACHINE SCREW
5305-01-330-6420 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: 0.25020 UNC3A X 0.750 LG, 0.250-20 UNC-3A X 0.750 LG, FFS92 TY1 ST2S, FF-S-92 TY1 ST2S, 5305-01-330-6420, 01-330-6420, 5305013306420, 013306420
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | DEC 06, 1990 | 01-330-6420 | 06657 ( SCREW, MACHINE ) |
REFERENCE DRAWINGS & PICTURES
DISHED HEXAGON
CROSS RECESS TYPE 1
Cross Reference | NSN 5305-01-330-6420
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 0.250-20 UNC-3A X 0.750 LG | 80204 | AMERICAN NATIONAL STANDARDSINSTITUTE, INCORPORATED |
| FF-S-92 TY1 ST2S | 81349 | MILITARY SPECIFICATIONSPROMULGATED BY MILITARY |
Technical Data | NSN 5305-01-330-6420
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.650 INCHES NOMINAL |
| FASTENER LENGTH | 0.750 INCHES NOMINAL |
| SCREW MATERIAL | NICKEL ALLOY K-500 |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-281 CL A FED SPEC SINGLE MATERIAL RESPONSE |
| MINIMUM TENSILE STRENGTH | 80000 POUNDS PER SQUARE INCH |
| HEAD STYLE | 9 DISHED HEXAGON |
| HEAD DIAMETER | 0.452 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
| COUNTERSINK ANGLE | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| INTERNAL DRIVE STYLE | 0 CROSS RECESS TYPE 1 |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND 2S STYLE |