The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-324-5405, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-324-5405 |
| Primary Part Number | 40659-101VM |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Flow Control Device | PISTON, BOTTOM GUIDED |
| Second End Relationship with First End | IDENTICAL |
| Body Style | TEE |
| Face to Face Distance | 9.500 INCHES NOMINAL IN |
| First End Style Designator | PLAIN |
| Temp Rating | 275.0 FAHRENHEIT MAXIMUM DEGF |
| First Connection Face to Centerline Distance | 6.125 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-288 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | QQ-N-288 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| End Connection Quantity | 2 |
| First End Connection Type | PLAIN FACE FLANGE |
| First End Flange Shape Style | ROUND |
| Thermostatic Element | INTEGRAL W/VALVE |
| Material | NICKEL ALLOY STEM |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | NICKEL ALLOY SEAT |
| Material | COPPER ALLOY 922 BODY |
| Furnished Items | ADJUSTMENT STEM |
| Reference Number Differentiating Characteristics | MAGNETIC PERMEABILITY SHALL NOT EXCEED 2.0 AFTER FABRICATION |
| 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 |
|---|---|
| 40659-101VM | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 40659-101 | 3/1 Design control — primary reference Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
NSN 4820-01-324-5405 is a Valve,regulating,temperature, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-324-5405 has 1 manufacturer part number on file: 40659-101VM (Naval Inventory Control Point Mechanicsburg).
Key specifications for 40659-101VM: Flow Control Device: PISTON, BOTTOM GUIDED; Second End Relationship with First End: IDENTICAL; Body Style: TEE; Face to Face Distance: 9.500 INCHES NOMINAL IN. 21 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.