The O-Ring, cataloged under National Stock Number 5331-00-165-1978, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is L3harris Technologies, Inc. Div Space and Airborne Systems. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 49 commercial cross-references from 27 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5331-00-165-1978 |
| Primary Part Number | 31481 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-Ring |
| Manufacturer | L3harris Technologies, Inc. Div Space and Airborne Systems |
| Status | CANCELLED |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| Outside Diameter | 1.934 INCHES MINIMUM AND 1.978 INCHES MAXIMUM IN |
| Hardness Rating | 75.0 SHORE DUROMETER A NOMINAL |
| Cross-Sectional Height | 0.114 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN |
| Center Hole Diameter | 1.706 INCHES MINIMUM AND 1.734 INCHES MAXIMUM IN |
| Elongation Percentage | 125 MAXIMUM |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| AS3208-24 | Fincantieri S.p.a. Div Direzione Navi Militari (ITA) |
| 3-24 V747-75 | Parker-Hannifin Corp Div O-Ring Division (USA) |
| 2306990 REV J IT NO 168 | Rolls-Royce Corporation (USA) |
| 5331PL0687369 | Jednolity Indeks Materialowy - Uniform Material Index (POL) |
| 3-924 V747-75 | Parker Hannifin Gmbh O-Ring Division (DEU) |
| AS3208-24 | Society of Automotive Engineers Inc (USA) |
| 3-924 V747-75 | Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division (USA) |
| AMS7276 | Sae International Dba Sae International (USA) |
| 516-6818073 ITEM F-1B | Naval Sea Systems Command (USA) |
| 6375B | Siemens Energy, Inc. Dba Dresser-Rand (USA) |
| M83248-1-1-924 | Zf Industrieantriebe Witten Gmbh (DEU) |
| SAE-AMS7276 | Sae International Dba Sae International (USA) |
| 5331PL1813311 | Jednolity Indeks Materialowy - Uniform Material Index (POL) |
| AS3208-24 | Ge Avio Srl (ITA) |
| B-24SR2702-75 | Stillman Seal Corporation Div Stillman Seal Corperation (USA) |
| MS9387-24 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| NAS1595-24 | National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA) |
| M83248/1-924 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 6375B | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| 31481 PRIMARY | L3harris Technologies, Inc. Div Space and Airborne Systems (USA) |
NSN 5331-00-165-1978 is a O-Ring, manufactured by L3harris Technologies, Inc. Div Space and Airborne Systems, classified under FSC 5331 (O-Ring). Status: cancelled.
NSN 5331-00-165-1978 has 49 cross-referenced part numbers: AS3208-24 (Fincantieri S.p.a. Div Direzione Navi Militari), 3-24 V747-75 (Parker-Hannifin Corp Div O-Ring Division), 2306990 REV J IT NO 168 (Rolls-Royce Corporation), 5331PL0687369 (Jednolity Indeks Materialowy - Uniform Material Index), 3-924 V747-75 (Parker Hannifin Gmbh O-Ring Division) and 44 more.
There are 12 known substitutes for 5331-00-165-1978: 5331-00-172-7189, 2530-00-217-9490, 5331-00-456-2532 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 31481: Material: RUBBER FLUOROCARBON CLASS FPM; Outside Diameter: 1.934 INCHES MINIMUM AND 1.978 INCHES MAXIMUM IN; Hardness Rating: 75.0 SHORE DUROMETER A NOMINAL; Cross-Sectional Height: 0.114 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN. 6 total characteristics are documented in the Federal Logistics Information System.
NSN 5331-00-165-1978 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.