The O-Ring, cataloged under National Stock Number 5331-01-606-3902, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Naval Inventory Control Point Mechanicsburg (CAGE 03950); Rix Industries (CAGE 28953) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-606-3902 |
| Primary Part Number | MX123-217-5CP |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| MX123-217-5CP | Naval Inventory Control Point Mechanicsburg (USA) |
| B8743 REV I ITEM 2CP | Naval Inventory Control Point Mechanicsburg (USA) |
| XM123-217-5 | Rix Industries (USA) |
| Reference | Meaning |
|---|---|
| B8743 REV I ITEM 2 | 5/1 Secondary reference Rix Industries |
| MX123-217-5 | 3/1 Design control — primary reference Rix Industries |
| B8743 | D/9 Drawing number reference only Rix Industries |
NSN 5331-01-606-3902 is a O-Ring, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-606-3902 has 3 manufacturer part numbers on file: MX123-217-5CP (Naval Inventory Control Point Mechanicsburg), B8743 REV I ITEM 2CP (Naval Inventory Control Point Mechanicsburg), XM123-217-5 (Rix Industries).
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-606-4528, 4310-01-606-4585, 4310-01-606-5297. Verify interchangeability with system specifications before substitution.
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.