The O-Ring, cataloged under National Stock Number 5331-01-243-2897, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Automatic Switch Company Dba Asco. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Automatic Switch Company Dba Asco (CAGE 04845); Ascomation Pty Ltd (CAGE Z4297) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-243-2897 |
| Primary Part Number | HV-039619-005-50 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Automatic Switch Company Dba Asco |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| HV-039619-00540 | Automatic Switch Company Dba Asco (USA) |
| 039619-005-50 | Ascomation Pty Ltd (AUS) |
| HV-039619-005-50 PRIMARY | Automatic Switch Company Dba Asco (USA) |
| Reference | Meaning |
|---|---|
| 34668962 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| 34668962 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 34668962 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5331-01-243-2897 is a O-Ring, manufactured by Automatic Switch Company Dba Asco, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-243-2897 has 3 manufacturer part numbers on file: HV-039619-00540 (Automatic Switch Company Dba Asco), 039619-005-50 (Ascomation Pty Ltd), HV-039619-005-50 (Automatic Switch Company Dba Asco).
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.