The Setscrew, cataloged under National Stock Number 5305-01-287-5777, 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 18 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 | 5305-01-287-5777 |
| Primary Part Number | MS51955-77 |
| Item Name | Setscrew |
| 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 |
| Surface Treatment Document and Classification | ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Head Style | SQUARE |
| Thread Length | 2.286 INCHES MINIMUM IN |
| Thread Class | 2A A |
| Head Height | 0.361 INCHES MINIMUM AND 0.369 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Width Between Flats | 0.484 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Fastener Length | 2.440 INCHES MINIMUM AND 2.500 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 13 |
| Point Style | CUP |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Surface Treatment | ZINC OVERALL |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM OVERALL |
| Departure From Cited Document | MODIFIED BY SURFACE TREATMENT |
| Nondefinitive Spec/std Data | 1 TYPE AND 4 STYLE |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| MS51955-77 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
NSN 5305-01-287-5777 is a Setscrew, 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 5305-01-287-5777 has 1 cross-referenced part number: MS51955-77 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).
There is 1 known substitute for 5305-01-287-5777: 5305-00-054-9291. Verify interchangeability with system specifications before substitution.
Key specifications for MS51955-77: Surface Treatment Document and Classification: ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Head Style: SQUARE; Thread Length: 2.286 INCHES MINIMUM IN; Thread Class: 2A A. 19 total characteristics are documented in the Federal Logistics Information System.