The Seat,valve, cataloged under National Stock Number 4820-01-150-4900, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tate Andale, Llc. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-150-4900 |
| Primary Part Number | 16733-1 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tate Andale, Llc |
| Status | ACTIVE |
| Body Outside Diameter | 3.999 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Body Inside Diameter | 3.562 INCHES NOMINAL IN |
| Seat Angle in Deg | 37.000 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 |
|---|---|
| 16733-1 PRIMARY | Tate Andale, Llc (USA) |
| Reference | Meaning |
|---|---|
| 16733 | D/9 Drawing number reference only Tate Andale, Llc |
| FIND N0.3 16733 | C/1 Advisory reference — outside the item-of-supply concept Tate Andale, Llc |
NSN 4820-01-150-4900 is a Seat,valve, manufactured by Tate Andale, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-150-4900 has 1 manufacturer part number on file: 16733-1 (Tate Andale, Llc).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-166-5185, 7610-01-309-3245, 4820-01-342-1729. Verify interchangeability with system specifications before substitution.
Key specifications for 16733-1: Overall Height: 1.750 INCHES NOMINAL IN; Body Outside Diameter: 3.999 INCHES NOMINAL IN; Style Designator: PLAIN; Body Inside Diameter: 3.562 INCHES NOMINAL IN. 5 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.