The Screw,machine, cataloged under National Stock Number 5305-01-398-8785, 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 15 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-398-8785 |
| Primary Part Number | MS51957-77B |
| 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 |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Quantity Per Inch | 20 |
| Head Height | 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 |
| Thread Class | 2A A |
| Head Style | PAN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.473 INCHES MINIMUM AND 0.492 INCHES MAXIMUM IN |
| Screw Surface Treatment | OXIDE |
| Screw Surface Treatment Document and Classification | MIL-C-13924 CL4 MIL SPEC SINGLE TREATMENT RESPONSE |
| Thread Length | 0.375 INCHES NOMINAL IN |
| Color | BLACK |
| Fastener Length | 0.375 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| MS51957-77B | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
NSN 5305-01-398-8785 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 5305-01-398-8785 has 1 cross-referenced part number: MS51957-77B (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).
There is 1 known substitute for 5305-01-398-8785: 5305-00-071-1313. Verify interchangeability with system specifications before substitution.
Key specifications for MS51957-77B: Internal Drive Style: CROSS RECESS TYPE 1; Thread Quantity Per Inch: 20; Head Height: 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.250 INCHES IN. 15 total characteristics are documented in the Federal Logistics Information System.