The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-416-5651, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Swagelok Co. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-416-5651 |
| Primary Part Number | SS-4R3A-SC11-1509 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Criticality Code Justification | FEAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 592-6314369 | Naval Sea Systems Command (USA) |
| SS-4R3A-SC11-1509 PRIMARY | Swagelok Co (USA) |
| Reference | Meaning |
|---|---|
| SS-4R3A-1509-NC-13 | 3/9 Design control — primary reference Nupro Co |
| 7055881 FIND 67 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| SS-4R3A-1509-NC-13 | 5/9 Secondary reference Swagelok Co |
| SS-4R3A-1509 | 5/9 Secondary reference Nupro Co |
NSN 4820-01-416-5651 is a Valve,relief,pressure and Temper, manufactured by Swagelok Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-416-5651 has 2 manufacturer part numbers on file: 592-6314369 (Naval Sea Systems Command), SS-4R3A-SC11-1509 (Swagelok Co).
Key specifications for SS-4R3A-SC11-1509: Criticality Code Justification: FEAT; Special Features: REQUIRES CLEANING PER MIL-STD-1330 OR EQUIVALENT CLEANING; End Item Identification: MK 3 MOD 0 LIGHT WEIGHT DIVE SYS. 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.
NSN 4820-01-416-5651 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.