The O-Ring, cataloged under National Stock Number 5331-01-538-1835, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Carver Pump Company. Government technical data includes 2 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-538-1835 |
| Primary Part Number | 999-4208-A-12-ITEM 89A |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Carver Pump Company |
| Status | ACTIVE |
| Material Document and Classification | ASTM D1418 CLASS FKM ASSN STD SINGLE MATERIAL RESPONSE |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| 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 |
|---|---|
| 999-4208-A-12-ITEM 89A PRIMARY | Carver Pump Company (USA) |
NSN 5331-01-538-1835 is a O-Ring, manufactured by Carver Pump Company, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-538-1835 has 1 manufacturer part number on file: 999-4208-A-12-ITEM 89A (Carver Pump Company).
Key specifications for 999-4208-A-12-ITEM 89A: Material Document and Classification: ASTM D1418 CLASS FKM ASSN STD SINGLE MATERIAL RESPONSE; Part Name Assigned by Controlling Agency: BACKCOVER O-RING; End Item Identification: MAXUM 1.5 X 1-8 CENTRIFUGAL PUMP,NSN 4320-01-537-3615; Material: RUBBER FLUOROCARBON CLASS FPM. 2 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.