The O-Ring, cataloged under National Stock Number 5331-01-521-3405, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Sae International Dba Sae International. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 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 | 5331-01-521-3405 |
| Primary Part Number | AS3581-903 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-Ring |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Hardness Rating | 85.0 SHORE DUROMETER A MINIMUM AND 95.0 SHORE DUROMETER A MAXIMUM |
| Material Document and Classification | AMS 7259 ASSN STD SINGLE MATERIAL RESPONSE |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| Center Hole Diameter | 0.296 INCHES MINIMUM AND 0.306 INCHES MAXIMUM IN |
| Cross-Sectional Height | 0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| AS3581-903 PRIMARY | Sae International Dba Sae International (USA) |
| SAE-AS3581 | Sae International Dba Sae International (USA) |
| AS3581-903 | Society of Automotive Engineers Inc (USA) |
NSN 5331-01-521-3405 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331 (O-Ring). Status: active.
NSN 5331-01-521-3405 has 3 cross-referenced part numbers: AS3581-903 (Sae International Dba Sae International), SAE-AS3581 (Sae International Dba Sae International), AS3581-903 (Society of Automotive Engineers Inc).
There are 2 known substitutes for 5331-01-521-3405: 5331-01-011-4057, 5331-01-683-8275. Verify interchangeability with system specifications before substitution.
Key specifications for AS3581-903: Hardness Rating: 85.0 SHORE DUROMETER A MINIMUM AND 95.0 SHORE DUROMETER A MAXIMUM; Material Document and Classification: AMS 7259 ASSN STD SINGLE MATERIAL RESPONSE; Material: RUBBER FLUOROCARBON CLASS FPM; Center Hole Diameter: 0.296 INCHES MINIMUM AND 0.306 INCHES MAXIMUM IN. 5 total characteristics are documented in the Federal Logistics Information System.