The O-Ring, cataloged under National Stock Number 5331-01-548-4769, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Nd Defense Llc. Government technical data includes 5 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5331-01-548-4769 |
| Primary Part Number | 1841185C1 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Nd Defense Llc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.139 INCHES NOMINAL IN |
| Outside Diameter | 4.887 INCHES NOMINAL IN |
| Material Document and Classification | ASTM D 2000/SAE J200 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 4.609 INCHES NOMINAL IN |
| Material | RUBBER ETHYLENE-PROPYLENE-DIENE CLASS EPDM |
| 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 |
|---|---|
| 1841185C1 PRIMARY | Nd Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 1841185C1 | 5/9 Secondary reference U.S. Government activity |
| EMD-1484 | D/9 Drawing number reference only Nd Defense Llc |
NSN 5331-01-548-4769 is a O-Ring, manufactured by Nd Defense Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-548-4769 has 1 manufacturer part number on file: 1841185C1 (Nd Defense Llc).
2 possible matches (shared part number, not a government interchangeability claim): 5331-01-556-5165, 5331-01-566-5646. Verify interchangeability with system specifications before substitution.
Key specifications for 1841185C1: Cross-Sectional Height: 0.139 INCHES NOMINAL IN; Outside Diameter: 4.887 INCHES NOMINAL IN; Material Document and Classification: ASTM D 2000/SAE J200 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE; Center Hole Diameter: 4.609 INCHES NOMINAL IN. 5 specifications are 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.