The Valve,safety Relief, cataloged under National Stock Number 4820-00-103-5488, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Womack Machine Supply Company of Oklahoma, Inc.. Government technical data includes 16 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. 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 | 4820-00-103-5488 |
| Primary Part Number | 559B2M10 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Womack Machine Supply Company of Oklahoma, Inc. |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN (PIPE) FIRST END |
| Style Designator | STRAIGHT THRU W/BAFFLE |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Maximum Operating Temp | 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Media for Which Designed | GAS, INERT THIRD RESPONSE |
| Media for Which Designed | AIR SECOND RESPONSE |
| Media for Which Designed | ACETYLENE FIRST RESPONSE |
| Media for Which Designed | REFRIGERANT 12 FOURTH RESPONSE |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | NPT FIRST END |
| Opening Pressure Setting | 10.0 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 |
|---|---|
| 559B2M10 PRIMARY | Womack Machine Supply Company of Oklahoma, Inc. (USA) |
NSN 4820-00-103-5488 is a Valve,safety Relief, manufactured by Womack Machine Supply Company of Oklahoma, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-103-5488 has 1 manufacturer part number on file: 559B2M10 (Womack Machine Supply Company of Oklahoma, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4820-00-549-4733. Verify interchangeability with system specifications before substitution.
Key specifications for 559B2M10: Flow Control Device: DISK; Connection Style: PLAIN (PIPE) FIRST END; Style Designator: STRAIGHT THRU W/BAFFLE; Operating Pressure: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 16 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.