The O-Ring, cataloged under National Stock Number 5331-01-522-2221, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Brennan Industries. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-522-2221 |
| Primary Part Number | 4000-20 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-Ring |
| Manufacturer | Brennan Industries |
| Status | ACTIVE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Center Hole Diameter | 1.475 INCHES NOMINAL IN |
| Hardness Rating | 90.0 SHORE DUROMETER A MINIMUM |
| Cross-Sectional Height | 0.118 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| HI-721-3100 IT 145 | Hhe Services, Inc. (USA) |
| 4000-20 PRIMARY | Brennan Industries (USA) |
NSN 5331-01-522-2221 is a O-Ring, manufactured by Brennan Industries, classified under FSC 5331 (O-Ring). Status: active.
NSN 5331-01-522-2221 has 2 cross-referenced part numbers: HI-721-3100 IT 145 (Hhe Services, Inc.), 4000-20 (Brennan Industries).
There are 8 known substitutes for 5331-01-522-2221: 3110-00-227-4830, 5950-00-922-2940, 3950-01-071-1746 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 4000-20: Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR; Center Hole Diameter: 1.475 INCHES NOMINAL IN; Hardness Rating: 90.0 SHORE DUROMETER A MINIMUM; Cross-Sectional Height: 0.118 INCHES NOMINAL IN. 4 total characteristics are documented in the Federal Logistics Information System.