The O-Ring, cataloged under National Stock Number 5331-01-308-1884, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, 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 | 5331-01-308-1884 |
| Primary Part Number | MS28775-263 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-Ring |
| Manufacturer | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| Status | ACTIVE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Hardness Rating | 70.0 SHORE DUROMETER A NOMINAL |
| Temp Rating | -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF |
| Peripheral Diameter | 7.512 INCHES NOMINAL IN |
| Departure From Cited Document | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Center Hole Diameter | 7.204 INCHES MINIMUM AND 7.264 INCHES MAXIMUM IN |
| Criticality Code Justification | ZZZW |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| MS28775-263 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| AS28775 | Society of Automotive Engineers Inc (USA) |
| SAE-AS28775 | Sae International Dba Sae International (USA) |
| MS28775-263 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| AN123923 | Electric Boat Corp Dba Electro Dynamic (USA) |
| AS28775 | Sae International Dba Sae International (USA) |
NSN 5331-01-308-1884 is a O-Ring, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5331 (O-Ring). Status: active.
NSN 5331-01-308-1884 has 6 cross-referenced part numbers: MS28775-263 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), AS28775 (Society of Automotive Engineers Inc), SAE-AS28775 (Sae International Dba Sae International), MS28775-263 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), AN123923 (Electric Boat Corp Dba Electro Dynamic) and 1 more.
There are 2 known substitutes for 5331-01-308-1884: 5331-00-290-9390, 5331-00-882-5029. Verify interchangeability with system specifications before substitution.
Key specifications for MS28775-263: Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR; Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL; Temp Rating: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF; Peripheral Diameter: 7.512 INCHES NOMINAL IN. 8 total characteristics are documented in the Federal Logistics Information System.