The Valve,regulating,temperature, cataloged under National Stock Number 4820-00-983-8183, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Lawler Manufacturing Company, Inc.. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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 | 4820-00-983-8183 |
| Primary Part Number | 823D |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Lawler Manufacturing Company, Inc. |
| Status | ACTIVE |
| Two-Way Valve Action | REVERSE ACTING |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| First End Style Designator | SOCKET W/BRAZING RING |
| Bulb Length | 18.000 INCHES NOMINAL IN |
| Bulb Diameter | 1.250 INCHES NOMINAL IN |
| Temp Rating | 50.0 FAHRENHEIT MINIMUM AND 105.0 FAHRENHEIT MAXIMUM DEGF |
| End Connection Quantity | 2 |
| Capillary Tube Length | 180.000 INCHES NOMINAL IN |
| First End Connection Type | UNTHREADED INTERNAL PIPE |
| Temp Adjustability | ADJUSTABLE |
| Thermostatic Element | FINNED |
| First End Nominal Pipe Size Accommodated | 0.750 INCHES IN |
| Material | COPPER ALLOY BODY |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING SEAT |
| Material | COPPER BULB |
| Furnished Items | BRAZING RING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4820-00-983-8183 is a Valve,regulating,temperature, manufactured by Lawler Manufacturing Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-983-8183 has 2 manufacturer part numbers on file: 823D (Lawler Manufacturing Company, Inc.), 1260D (Lawler Manufacturing Company, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5940-01-122-7355. Verify interchangeability with system specifications before substitution.
Key specifications for 823D: Two-Way Valve Action: REVERSE ACTING; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU; First End Style Designator: SOCKET W/BRAZING RING. 18 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.