The Stem,fluid Valve, cataloged under National Stock Number 4820-01-271-3660, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Swagelok Co. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-271-3660 |
| Primary Part Number | SS-3A-63-1 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Valve Type for Which Designed | BALL |
| Stem Actuating End Type | THREADED EXTERNALLY |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| SS-3A-63-1 PRIMARY | Swagelok Co (USA) |
| Reference | Meaning |
|---|---|
| SS-3A-63-1 | 5/9 Secondary reference Whitey Co |
NSN 4820-01-271-3660 is a Stem,fluid Valve, manufactured by Swagelok Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-271-3660 has 1 manufacturer part number on file: SS-3A-63-1 (Swagelok Co).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-290-5684. Verify interchangeability with system specifications before substitution.
Key specifications for SS-3A-63-1: Valve Type for Which Designed: BALL; Stem Actuating End Type: THREADED EXTERNALLY; Special Features: 2500 PSI; Material: STEEL CORROSION RESISTING. 3 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.