The Valve,linear,directional Control, cataloged under National Stock Number 4820-01-014-1988, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Humphrey Products Co. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-014-1988 |
| Primary Part Number | 501A-3-12-20 |
| Item Name | Valve,linear,directional Control |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Humphrey Products Co |
| 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 |
|---|---|
| 501A-3-12-20 PRIMARY | Humphrey Products Co (USA) |
| Reference | Meaning |
|---|---|
| 1025-30203PC15 | 5/9 Secondary reference Jbf Scientific Corp |
| 1025-30203 | D/9 Drawing number reference only Jbf Scientific Corp |
NSN 4820-01-014-1988 is a Valve,linear,directional Control, manufactured by Humphrey Products Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-014-1988 has 1 manufacturer part number on file: 501A-3-12-20 (Humphrey Products Co).
1 possible match (shared part number, not a government interchangeability claim): 4310-01-301-5280. Verify interchangeability with system specifications before substitution.
Key specifications for 501A-3-12-20: Special Features: ALUMINUM,THREE INTERNAL PORTS 1/2 IN. NPT,125.0 PSI WORKING PRESSURE,M30 DEG F TO 225 DEG F,MOUNT IN ANY POSITION IN. 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.