The Seat,valve, cataloged under National Stock Number 4820-01-013-3388, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-013-3388 |
| Primary Part Number | 9017-001-148 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Body Outside Diameter | 6.357 INCHES MINIMUM AND 6.365 INCHES MAXIMUM IN |
| Style Designator | PLAIN |
| Material Document and Classification | ASTM A216, GRADE WCB ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 5.062 INCHES NOMINAL IN |
| Material | STEEL UNS J03002 OVERALL |
| Seat Angle in Deg | 45.000 NOMINAL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 9017-001-148 PRIMARY | Velan Valve Corp. (USA) |
| 88426 5IN PIECE 2 PRIMARY | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| 88426 5IN PIECE | C/1 Advisory reference — outside the item-of-supply concept Velan Valve Corp. |
| 88426 | D/9 Drawing number reference only Velan Valve Corp. |
NSN 4820-01-013-3388 is a Seat,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-013-3388 has 2 manufacturer part numbers on file: 9017-001-148 (Velan Valve Corp.), 88426 5IN PIECE 2 (Velan Valve Corp.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-014-2695. Verify interchangeability with system specifications before substitution.
Key specifications for 9017-001-148: Overall Height: 2.750 INCHES MINIMUM AND 2.765 INCHES MAXIMUM IN; Body Outside Diameter: 6.357 INCHES MINIMUM AND 6.365 INCHES MAXIMUM IN; Style Designator: PLAIN; Material Document and Classification: ASTM A216, GRADE WCB ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 7 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.