The Disk,valve, cataloged under National Stock Number 4820-01-173-8427, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command Logistics Support Engineering Activity. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-173-8427 |
| Primary Part Number | 902-00086 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command Logistics Support Engineering Activity |
| 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 |
|---|---|
| 902-00086 PRIMARY | Naval Sea Systems Command Logistics Support Engineering Activity (USA) |
| 956-00012-2 | Naval Sea Systems Command Logistics Support Engineering Activity (USA) |
| Reference | Meaning |
|---|---|
| 956-00012 | D/9 Drawing number reference only Naval Sea Systems Command Logistics Support Engineering Activity |
NSN 4820-01-173-8427 is a Disk,valve, manufactured by Naval Sea Systems Command Logistics Support Engineering Activity, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-173-8427 has 2 manufacturer part numbers on file: 902-00086 (Naval Sea Systems Command Logistics Support Engineering Activity), 956-00012-2 (Naval Sea Systems Command Logistics Support Engineering Activity).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-233-5298. Verify interchangeability with system specifications before substitution.
Key specifications for 902-00086: Special Features: CONSISTS OF ONE O-RING, RUBBER, MIL-P-25732; ONE DISK; ONE PIVOT PIN; TWO RETAINING RINGS; TWO FLANGED BUSHINGS; TWO BUSHING SLEEVES; ONE BUMNPER TIP AND ONE COTTER PIN, MONEL. 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.