The Valve,vacuum Regulating, cataloged under National Stock Number 4820-01-602-9937, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mirada Research & Manufacturing, Inc.. Government technical data includes 19 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-602-9937 |
| Primary Part Number | B-51343-1 |
| Item Name | Valve,vacuum Regulating |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mirada Research & Manufacturing, Inc. |
| Status | ACTIVE |
| Flow Control Device | STEM AND INTEGRAL DISK |
| First End Thread Series Designator | UNS |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | NOT IDENTICAL |
| Absolute Pressure Range | -28.0 TO 30.0 |
| Second End Thread Class | 1G G |
| Body Style | STRAIGHT THRU |
| First End Style Designator | PLAIN |
| End Connection Quantity | 2 |
| Second End Thread Direction | RIGHT-HAND |
| Body Material | ALUMINUM ALLOY 6061 |
| Second End Style Designator | PLAIN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Temp Adjustability | NOT ADJUSTABLE |
| First End Outside Diameter Tube Accommodated | 0.750 INCHES NOMINAL IN |
| Second End Connection Type | THREADED EXTERNAL BOSS |
| Furnished Items | WASHER AND POSITION INDICATOR |
| Absolute Pressure Setting | 30.0 |
| First End Nominal Thread Size | 1.062 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4820-01-602-9937 is a Valve,vacuum Regulating, manufactured by Mirada Research & Manufacturing, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-602-9937 has 2 manufacturer part numbers on file: US-100624 (Uni-Safe Rettungsgerate Gmbh), B-51343-1 (Mirada Research & Manufacturing, Inc.).
Key specifications for B-51343-1: Flow Control Device: STEM AND INTEGRAL DISK; First End Thread Series Designator: UNS; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: NOT IDENTICAL. 19 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.