The Valve,pneumatic Tank, cataloged under National Stock Number 4820-01-309-4083, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Schrader-Bridgeport International Inc Dba Schrader Automotive. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-309-4083 |
| Primary Part Number | 645-M8 |
| Item Name | Valve,pneumatic Tank |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Schrader-Bridgeport International Inc Dba Schrader Automotive |
| Status | ACTIVE |
| Flow Control Device | PLUG |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | 150.0 FAHRENHEIT DEGF |
| Body Style | STRAIGHT THRU |
| First End Style Designator | PLAIN |
| End Connection Quantity | 1 |
| First End Connection Type | THREADED INTERNAL PIPE |
| Media for Which Designed | AIR |
| First End Nominal Pipe Size Accommodated | 0.125 INCHES IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING SPRING |
| Material | COPPER ALLOY STEM |
| 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 |
|---|---|
| 1551AS929-1 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 645-M8 PRIMARY | Schrader-Bridgeport International Inc Dba Schrader Automotive (USA) |
| Reference | Meaning |
|---|---|
| 645-M-138 | 5/9 Secondary reference Schrader-Bridgeport International Inc Dba Schrader Automotive |
| 1551AS929 | 7/2 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 4820-01-309-4083 is a Valve,pneumatic Tank, manufactured by Schrader-Bridgeport International Inc Dba Schrader Automotive, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-309-4083 has 2 manufacturer part numbers on file: 1551AS929-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 645-M8 (Schrader-Bridgeport International Inc Dba Schrader Automotive).
Key specifications for 645-M8: Flow Control Device: PLUG; First End Thread Direction: RIGHT-HAND; Temp Rating: 150.0 FAHRENHEIT DEGF; Body Style: STRAIGHT THRU. 12 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.