The Screw,machine, cataloged under National Stock Number 5305-01-424-3581, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-424-3581 |
| Primary Part Number | MS51959-81 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| Status | ACTIVE |
| Thread Length | 0.497 INCHES NOMINAL IN |
| Fastener Length | 0.719 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Screw Surface Treatment | PASSIVATE |
| Thread Class | 2A A |
| Screw Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OR FF-S-86 FED STD SINGLE MATERIAL RESPONSE |
| Head Style | FLAT COUNTERSUNK |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Screw Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE |
| Countersink Angle | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| Head Diameter | 0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN |
| Thread Direction | LEFT-HAND |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Departure From Cited Document | AS MODIFIED BY MATERIAL |
| Screw Material | STEEL COMP 304 |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Quantity Per Inch | 20 |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| MS51959-81 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
NSN 5305-01-424-3581 is a Screw,machine, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-01-424-3581 has 1 cross-referenced part number: MS51959-81 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).
There are 2 known substitutes for 5305-01-424-3581: 5305-00-719-5021, 5305-01-424-3572. Verify interchangeability with system specifications before substitution.
Key specifications for MS51959-81: Thread Length: 0.497 INCHES NOMINAL IN; Fastener Length: 0.719 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN; Screw Surface Treatment: PASSIVATE; Thread Class: 2A A. 17 total characteristics are documented in the Federal Logistics Information System.