The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-271-0154, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Richards Industries Valve Group Jordan Valve Div. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-271-0154 |
| Primary Part Number | MARK 80 2IN TYPE A |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Richards Industries Valve Group Jordan Valve Div |
| Status | ACTIVE |
| Flow Control Device | BULB |
| Two-Way Valve Action | DIRECT ACTING |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| First End Style Designator | PLAIN |
| Bulb Length | 12.000 INCHES NOMINAL IN |
| Bulb Diameter | 1.000 INCHES NOMINAL IN |
| Temp Rating | 500.0 FAHRENHEIT MAXIMUM DEGF |
| End Connection Quantity | 2 |
| Capillary Tube Length | 96.000 INCHES NOMINAL IN |
| First End Connection Type | THREADED INTERNAL PIPE |
| Temp Adjustability | ADJUSTABLE |
| Thermostatic Element | LIQUID IMMERSION TYPE |
| Material | IRON BODY |
| Material | COPPER BULB |
| Thread Size and Series/type Designator | 2-11-1/2 NPT FIRST END |
| 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 |
|---|---|
| BA84956 MARK 80 | Richards Industries Valve Group Jordan Valve Div (USA) |
| MARK 80 2IN TYPE A PRIMARY | Richards Industries Valve Group Jordan Valve Div (USA) |
| MARK 80 2IN 120T185 FLG IRON | Richards Industries Valve Group Jordan Valve Div (USA) |
NSN 4820-01-271-0154 is a Valve,regulating,temperature, manufactured by Richards Industries Valve Group Jordan Valve Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-271-0154 has 3 manufacturer part numbers on file: BA84956 MARK 80 (Richards Industries Valve Group Jordan Valve Div), MARK 80 2IN TYPE A (Richards Industries Valve Group Jordan Valve Div), MARK 80 2IN 120T185 FLG IRON (Richards Industries Valve Group Jordan Valve Div).
Key specifications for MARK 80 2IN TYPE A: Flow Control Device: BULB; Two-Way Valve Action: DIRECT ACTING; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL. 17 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.