The Valve,vent-Check, cataloged under National Stock Number 4820-01-535-8753, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Robert H Wager Co Inc. Government technical data includes 16 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-535-8753 |
| Primary Part Number | 2.5-1700TBC |
| Item Name | Valve,vent-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Robert H Wager Co Inc |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Flange Shape | ROUND WITH HOLES FIRST END |
| Furnished Items and Quantity | 1 FILTER SCREEN AND 1 FLOAT AND 1 CAP |
| Connection Style | PLAIN, OPTIONAL END (PIPE) FIRST END |
| Bolt Circle Nominal Diameter | 0.250 INCHES FIRST END IN |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Type | FLANGE FIRST END |
| Style Designator | STRAIGHT THRU |
| Valve Size | 2.500 INCHES IN |
| Thread Direction | RIGHT-HAND SECOND END |
| Nominal Thread Size | 2.500 INCHES SECOND END IN |
| Nominal Outside Diameter | 6.110 INCHES FIRST END IN |
| Bolt Hole Quantity | 3 FIRST END |
| Material | COPPER ALLOY BODY |
| Thread Series Designator | NPT SECOND END |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 2.5-1700TBC PRIMARY | Robert H Wager Co Inc (USA) |
NSN 4820-01-535-8753 is a Valve,vent-Check, manufactured by Robert H Wager Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-535-8753 has 1 manufacturer part number on file: 2.5-1700TBC (Robert H Wager Co Inc).
Key specifications for 2.5-1700TBC: Flow Control Device: BALL; Flange Shape: ROUND WITH HOLES FIRST END; Furnished Items and Quantity: 1 FILTER SCREEN AND 1 FLOAT AND 1 CAP; Connection Style: PLAIN, OPTIONAL END (PIPE) FIRST END. 16 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.