The Retainer,disk,valve, cataloged under National Stock Number 4820-01-059-1308, 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. The record lists 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-059-1308 |
| Primary Part Number | B-F-26535E |
| Item Name | Retainer,disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| Status | ACTIVE |
| 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 |
|---|---|
| 1889567PC17ASSYA1-2IN | Naval Sea Systems Command (USA) |
| B-F-26535E PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| 2620-925X2PC17ASSYA1-2IN PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| SS845-1889567PC17ASSYA1-2IN | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 2620-925X2PC17ASSYA1-2IN | 5/9 Secondary reference U.S. Government activity |
| SS845-1889567 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-059-1308 is a Retainer,disk,valve, manufactured by William Powell Company, the Dba Powell Valve Div the Starflo Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-059-1308 has 4 manufacturer part numbers on file: 1889567PC17ASSYA1-2IN (Naval Sea Systems Command), B-F-26535E (William Powell Company, the Dba Powell Valve Div the Starflo Corporation), 2620-925X2PC17ASSYA1-2IN (William Powell Company, the Dba Powell Valve Div the Starflo Corporation), SS845-1889567PC17ASSYA1-2IN (Naval Sea Systems Command).
7 possible matches (shared part number, not a government interchangeability claim): 4820-01-063-4840, 4820-01-115-6756, 4820-01-118-8056. Verify interchangeability with system specifications before substitution.
Key specifications for B-F-26535E: Special Features: MATERIAL 316 CRES. 0 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.