The Stem,fluid Valve, cataloged under National Stock Number 4820-01-131-9659, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Swagelok Co. Government technical data includes 4 specifications, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-131-9659 |
| Primary Part Number | SS-3A-63 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 DISK |
| Largest Outside Diameter | 0.375 INCHES NOMINAL IN |
| Stem Actuating End Type | FLATTED AND 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 PRIMARY | Swagelok Co (USA) |
| 1008-B300 FIND 6 | Swagelok Co (USA) |
| Reference | Meaning |
|---|---|
| 1008-B300 | D/9 Drawing number reference only Whitey Co |
| SS-3A-63 | 5/9 Secondary reference Whitey Co |
| 1008-B300 FIND 6 | 5/9 Secondary reference Whitey Co |
NSN 4820-01-131-9659 is a Stem,fluid Valve, manufactured by Swagelok Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-131-9659 has 2 manufacturer part numbers on file: SS-3A-63 (Swagelok Co), 1008-B300 FIND 6 (Swagelok Co).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-290-5685. Verify interchangeability with system specifications before substitution.
Key specifications for SS-3A-63: Furnished Items and Quantity: 1 DISK; Largest Outside Diameter: 0.375 INCHES NOMINAL IN; Stem Actuating End Type: FLATTED AND THREADED EXTERNALLY; Overall Length: 1.375 INCHES NOMINAL IN. 4 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.