The Disk,valve, cataloged under National Stock Number 4820-01-185-3271, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is William Powell Company, the Dba Powell Valve Div the Starflo Corporation. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-185-3271 |
| Primary Part Number | D29886 1560SWLDG PIECE 9 2 IN |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| Status | ACTIVE |
| Shank Diameter | 0.555 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 0.715 INCHES NOMINAL IN |
| Pressure Rating | 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Outside Diameter | 1.453 INCHES NOMINAL IN |
| Style Designator | POPPET |
| Material Document and Classification | AISI 416 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A582, TYPE 416, COND T ASSN STD 2ND MATERIAL RESPONSE |
| Seat Angle | 90.0 DEGREES NOMINAL |
| Under Flange Height | 0.275 INCHES NOMINAL IN |
| Media for Which Designed | GAS |
| Material | STEEL COMP 416 |
| 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 |
|---|---|
| D29886 1560SWLDG PIECE 9 2 IN PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| Reference | Meaning |
|---|---|
| D29886 | D/9 Drawing number reference only William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
NSN 4820-01-185-3271 is a Disk,valve, manufactured by William Powell Company, the Dba Powell Valve Div the Starflo Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-185-3271 has 1 manufacturer part number on file: D29886 1560SWLDG PIECE 9 2 IN (William Powell Company, the Dba Powell Valve Div the Starflo Corporation).
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-185-3272, 4820-01-192-3529, 4820-01-192-3730. Verify interchangeability with system specifications before substitution.
Key specifications for D29886 1560SWLDG PIECE 9 2 IN: Shank Diameter: 0.555 INCHES NOMINAL IN; Flange Seat to Disk End Height: 0.715 INCHES NOMINAL IN; Overall Height: 0.969 INCHES NOMINAL IN; Pressure Rating: 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS. 10 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.