The O-Ring, cataloged under National Stock Number 5331-01-537-0197, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Young & Cunningham America, Inc.. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-537-0197 |
| Primary Part Number | A3.4065-.75IN-ITEM 6 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Young & Cunningham America, Inc. |
| Status | ACTIVE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A3.4065-.75IN-ITEM 6 PRIMARY | Young & Cunningham America, Inc. (USA) |
| Reference | Meaning |
|---|---|
| A3.4065 | D/9 Drawing number reference only Young & Cunningham America, Inc. |
NSN 5331-01-537-0197 is a O-Ring, manufactured by Young & Cunningham America, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-537-0197 has 1 manufacturer part number on file: A3.4065-.75IN-ITEM 6 (Young & Cunningham America, Inc.).
7 possible matches (shared part number, not a government interchangeability claim): 5330-01-537-0205, 5331-01-537-0211, 5331-01-537-0215. Verify interchangeability with system specifications before substitution.
Key specifications for A3.4065-.75IN-ITEM 6: End Item Identification: VALVE, GATE, QUICK CLOSE A3.4065-.75 IN IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.