The O-Ring, cataloged under National Stock Number 5331-01-538-2769, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Crysteel Manufacturing, Inc Dba Crysteel Manufacturing Inc. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-538-2769 |
| Primary Part Number | 404823 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Crysteel Manufacturing, Inc Dba Crysteel Manufacturing Inc |
| Status | ACTIVE |
| Hardness Rating | 90.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 0.739 INCHES NOMINAL IN |
| Material | RUBBER BUTADIENE NITRILE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5331-01-538-2769 is a O-Ring, manufactured by Crysteel Manufacturing, Inc Dba Crysteel Manufacturing Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-538-2769 has 2 manufacturer part numbers on file: 1643774 (Crysteel Manufacturing, Inc Dba Crysteel Manufacturing Inc), 404823 (Crysteel Manufacturing, Inc Dba Crysteel Manufacturing Inc).
1 possible match (shared part number, not a government interchangeability claim): 5995-01-547-5269. Verify interchangeability with system specifications before substitution.
Key specifications for 404823: Hardness Rating: 90.0 SHORE DUROMETER A NOMINAL; Center Hole Diameter: 0.739 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: NITRILE 90A DURO AS568-018 A; End Item Identification: 3990-01-443-8024, ENGINEERING MISSION MODULE (EMM) FOR THE PALLETIZED LOADING SYSTEM (PLS). 3 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.