The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-371-2645, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watson Mcdaniel Co. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-371-2645 |
| Primary Part Number | 4.00IN SERIES151FLG,LESSACTUATOR |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watson Mcdaniel Co |
| Status | ACTIVE |
| First End Bolt Hole Quantity | 8 |
| Flow Control Device | DOUBLE SEATED |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| Face to Face Distance | 10.250 INCHES NOMINAL IN |
| First End Flange Thickness | 0.938 INCHES NOMINAL IN |
| First End Flange Outside Diameter | 9.000 INCHES NOMINAL IN |
| First End Style Designator | PLAIN |
| Temp Rating | 110.0 FAHRENHEIT MAXIMUM DEGF |
| First End Bolt Hole Diameter | 0.750 INCHES NOMINAL IN |
| First End Bolt Circle Diameter | 7.500 INCHES NOMINAL IN |
| End Connection Quantity | 2 |
| First End Connection Type | PLAIN FACE FLANGE |
| Temp Adjustability | NOT ADJUSTABLE |
| First End Flange Shape Style | ROUND W/ BOLT HOLES |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| 4.00IN SERIES151FLG,LESSACTUATOR PRIMARY | Watson Mcdaniel Co (USA) |
NSN 4820-01-371-2645 is a Valve,regulating,temperature, manufactured by Watson Mcdaniel Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-371-2645 has 1 manufacturer part number on file: 4.00IN SERIES151FLG,LESSACTUATOR (Watson Mcdaniel Co).
Key specifications for 4.00IN SERIES151FLG,LESSACTUATOR: First End Bolt Hole Quantity: 8; Flow Control Device: DOUBLE SEATED; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU. 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.