The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-320-8260, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-320-8260 |
| Primary Part Number | 40534-102 |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| Status | ACTIVE |
| First End Bolt Hole Quantity | 8 |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| Face to Face Distance | 8.375 INCHES NOMINAL IN |
| First End Flange Outside Diameter | 0.563 INCHES NOMINAL IN |
| First End Style Designator | PLAIN |
| Second End Bolt Hole Quantity | 8 |
| Temp Rating | 70.0 FAHRENHEIT MINIMUM AND 76.0 FAHRENHEIT MAXIMUM DEGF |
| First End Bolt Circle Diameter | 5.500 INCHES NOMINAL IN |
| End Connection Quantity | 2 |
| Second End Bolt Circle Diameter | 5.500 INCHES NOMINAL IN |
| Second End Flange Shape Style | ROUND W/ BOLT HOLES |
| First End Connection Type | PLAIN FACE FLANGE |
| Temp Adjustability | NOT ADJUSTABLE |
| Second End Flange Outside Diameter | 0.563 INCHES NOMINAL IN |
| First End Flange Shape Style | ROUND W/ BOLT HOLES |
| Material | COPPER ALLOY BODY |
| Second End Bolt Hole Diameter | 6.500 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 40534-102 PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 6262305 | 7/2 Vendor item drawing reference Naval Sea Systems Command |
NSN 4820-01-320-8260 is a Valve,regulating,temperature, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-320-8260 has 1 manufacturer part number on file: 40534-102 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 5935-01-463-4664. Verify interchangeability with system specifications before substitution.
Key specifications for 40534-102: First End Bolt Hole Quantity: 8; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU; Face to Face Distance: 8.375 INCHES NOMINAL IN. 18 specifications are documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). 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.