The Seat,valve, cataloged under National Stock Number 4820-01-239-5254, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Crane Co Div Valve Div. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-239-5254 |
| Primary Part Number | 32857 PC6 040 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Crane Co Div Valve Div |
| Status | ACTIVE |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | ASTM A216 GR.WCB ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Material | STEEL OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 32857 PC6 040 PRIMARY | Crane Co Div Valve Div (USA) |
| 471/2U 4IN SEAT | Crane Co Div Valve Div (USA) |
| Reference | Meaning |
|---|---|
| B-105131 | D/9 Drawing number reference only Crane Co Flomatics Div |
| 32857 PIECE 6 4IN | 5/9 Secondary reference Crane Co Div Valve Div |
| 32857 | D/9 Drawing number reference only Crane Co Div Valve Div |
NSN 4820-01-239-5254 is a Seat,valve, manufactured by Crane Co Div Valve Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-239-5254 has 2 manufacturer part numbers on file: 32857 PC6 040 (Crane Co Div Valve Div), 471/2U 4IN SEAT (Crane Co Div Valve Div).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-239-9050, 4820-01-239-9227, 5305-01-543-7869. Verify interchangeability with system specifications before substitution.
Key specifications for 32857 PC6 040: Style Designator: PLAIN FLANGED; Material Document and Classification: ASTM A216 GR.WCB ASSN STD SINGLE MATERIAL RESPONSE SEAT; Material: STEEL OVERALL; Seating Surface Shape: FLAT. 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.