The Valve,safety Relief, cataloged under National Stock Number 4820-01-147-4855, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is F.c.kingston Co. Dba Storm Manufacturing. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-147-4855 |
| Primary Part Number | FIG.128-100 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | F.c.kingston Co. Dba Storm Manufacturing |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | ANGLE |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Material | COPPER ALLOY BODY |
| Thread Series Designator | NPT FIRST END |
| Opening Pressure Setting | 100.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| FIG.128-100 PRIMARY | F.c.kingston Co. Dba Storm Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 6153-50-100 | 5/9 Secondary reference Air Dry Co of America, Llc |
| 6153-50-100 | 5/2 Secondary reference U.S. Government activity |
| PTS12555 | D/9 Drawing number reference only Air Dry Co of America, Llc |
NSN 4820-01-147-4855 is a Valve,safety Relief, manufactured by F.c.kingston Co. Dba Storm Manufacturing, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-147-4855 has 1 manufacturer part number on file: FIG.128-100 (F.c.kingston Co. Dba Storm Manufacturing).
1 possible match (shared part number, not a government interchangeability claim): 4920-01-154-5921. Verify interchangeability with system specifications before substitution.
Key specifications for FIG.128-100: Flow Control Device: POPPET; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED EXTERNAL PIPE FIRST END; Style Designator: ANGLE. 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.