The Valve,expansion, cataloged under National Stock Number 4820-01-186-8670, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Atlas Metal Industries Inc. Government technical data includes 30 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-186-8670 |
| Primary Part Number | B0-3862-4 |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Atlas Metal Industries Inc |
| Status | ACTIVE |
| First End Thread Series Designator | UNF |
| Valve Equalizer Location | INTERNAL |
| Second End Seat Angle in Deg | 45.0 |
| First End Thread Direction | RIGHT-HAND |
| Second End Nominal Thread Size | 0.750 INCHES IN |
| Second End Relationship with First End | NOT IDENTICAL |
| Second End Thread Class | 3A A |
| Body Style | ANGLE GIVE "ADQM" OR "ADQN" IF FLANGED ONE OR TWO ENDS |
| First End Seat Angle in Deg | 45.0 |
| First End Thread Class | 3A A |
| First End Style Designator | FLARED |
| Bulb Length | 3.000 INCHES NOMINAL IN |
| Bulb Diameter | 0.500 INCHES NOMINAL IN |
| Mounting Method | CLAMP BULB |
| Second End Thread Series Designator | UNF |
| End Connection Quantity | 2 |
| Second End Thread Direction | RIGHT-HAND |
| Capillary Tube Length | 60.000 INCHES NOMINAL IN |
| Second End Style Designator | FLARED |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Valve Evaporator Temp Range Designation | LOW |
| First End Outside Diameter Tube Accommodated | 0.438 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Material | NICKEL ALLOY SEAT |
| Valve Expansion Control Type | THERMOSTATIC |
| Media for Which Designed | REFRIGERANT 12 |
| Second End Connection Type | THREADED EXTERNAL TUBE |
| Furnished Items | MOUNTING BRACKET |
| First End Nominal Thread Size | 0.438 INCHES IN |
| Second End Outside Diameter Tube Accommodated | 0.750 INCHES NOMINAL IN |
| 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 |
|---|---|
| B0-3862-4 PRIMARY | Atlas Metal Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| B0-3862-4 | 3/9 Design control — primary reference Precision Metal Products Inc |
NSN 4820-01-186-8670 is a Valve,expansion, manufactured by Atlas Metal Industries Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-186-8670 has 1 manufacturer part number on file: B0-3862-4 (Atlas Metal Industries Inc).
Key specifications for B0-3862-4: First End Thread Series Designator: UNF; Valve Equalizer Location: INTERNAL; Second End Seat Angle in Deg: 45.0; First End Thread Direction: RIGHT-HAND. 30 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.