The Valve,regulating,temperature, cataloged under National Stock Number 4820-00-908-3177, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Aerotech Herman Nelson International Inc. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-908-3177 |
| Primary Part Number | 501J |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Aerotech Herman Nelson International Inc |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | NOT IDENTICAL |
| Second End Thread Class | 2B |
| Body Style | STRAIGHT THRU |
| First End Style Designator | PLAIN |
| Bulb Length | 3.000 INCHES NOMINAL IN |
| Bulb Diameter | 0.375 INCHES NOMINAL IN |
| End Connection Quantity | 2 |
| Second End Thread Direction | RIGHT-HAND |
| Capillary Tube Length | 48.000 INCHES NOMINAL IN |
| Second End Style Designator | PLAIN |
| First End Connection Type | THREADED INTERNAL PIPE |
| Temp Adjustability | ADJUSTABLE |
| Thermostatic Element | STRAP TO PIPE |
| Material | COPPER ALLOY BODY |
| Material | COPPER BULB |
| Second End Connection Type | THREADED INTERNAL BOSS |
| Thread Size and Series/type Designator | 1/8-27 NPT FIRST END |
| Thread Size and Series/type Designator | 1/2-20 UNF SECOND END |
| 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 |
|---|---|
| 501J PRIMARY | Aerotech Herman Nelson International Inc (CAN) |
| Reference | Meaning |
|---|---|
| C5-59-386 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 4820-00-908-3177 is a Valve,regulating,temperature, manufactured by Aerotech Herman Nelson International Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-908-3177 has 1 manufacturer part number on file: 501J (Aerotech Herman Nelson International Inc).
1 possible match (shared part number, not a government interchangeability claim): 6625-01-052-4936. Verify interchangeability with system specifications before substitution.
Key specifications for 501J: Flow Control Device: POPPET; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: NOT IDENTICAL; Second End Thread Class: 2B. 20 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.