The O-Ring, cataloged under National Stock Number 5331-01-253-3728, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Kobelt Manufacturing Co. Ltd.. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-253-3728 |
| Primary Part Number | ACH-0256 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Kobelt Manufacturing Co. Ltd. |
| 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 |
|---|---|
| ACH-0256 PRIMARY | Kobelt Manufacturing Co. Ltd. (CAN) |
| D 1697 ITEM 26 | Kobelt Manufacturing Co. Ltd. (CAN) |
NSN 5331-01-253-3728 is a O-Ring, manufactured by Kobelt Manufacturing Co. Ltd., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-253-3728 has 2 manufacturer part numbers on file: ACH-0256 (Kobelt Manufacturing Co. Ltd.), D 1697 ITEM 26 (Kobelt Manufacturing Co. Ltd.).
Key specifications for ACH-0256: 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.