NSN 4820-01-320-8261 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-320-8261. Manufacturer of record part number: 40634-101.
First End Flange Outside Diameter: 5.500 INCHES NOMINAL IN
First End Style Designator: PLAIN
Identification
NSN: 4820-01-320-8261
NIIN: 013208261
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 40634-101
Manufacturer: Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
General Description
The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-320-8261, 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 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-320-8261
Primary Part Number
40634-101
Item Name
Valve,regulating,temperature
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Reference documents
Reference
Meaning
6129127
7/2Vendor item drawing reference
Naval Sea Systems Command
No interchangeability data on file.
Other items in FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-320-8261?
NSN 4820-01-320-8261 is a Valve,regulating,temperature, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-320-8261?
NSN 4820-01-320-8261 has 2 manufacturer part numbers on file: 40634-101 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40596-101 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
What are the specifications of 40634-101?
Key specifications for 40634-101: First End Bolt Hole Quantity: 8; Two-Way Valve Action: REVERSE ACTING; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU. 14 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-320-8261 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.