The Valve,manifold End, cataloged under National Stock Number 4820-01-055-4103, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Williams Controls Inc. Government technical data includes 1 specification, 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. 2 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 | 4820-01-055-4103 |
| Primary Part Number | WM-498-A |
| Item Name | Valve,manifold End |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Williams Controls Inc |
| Status | ACTIVE |
| General Characteristics Item Description | DESIGNED FOR TYPICAL DASHBOARD USE,MANIFOLD;A FIFTH 1/4 IN. N.P.T. OUTLET PORT;1/2 IN. W;WITH PIN NO. 104479 IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4820-01-055-4103 is a Valve,manifold End, manufactured by Williams Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-055-4103 has 2 manufacturer part numbers on file: 104075 (Williams Controls Inc), WM-498-A (Williams Controls Inc).
2 possible matches (shared part number, not a government interchangeability claim): 9310-01-606-8620, 5342-01-717-0605. Verify interchangeability with system specifications before substitution.
Key specifications for WM-498-A: General Characteristics Item Description: DESIGNED FOR TYPICAL DASHBOARD USE,MANIFOLD;A FIFTH 1/4 IN. N.P.T. OUTLET PORT;1/2 IN. W;WITH PIN NO. 104479 IN. 1 specification is 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.