The Valve,stop-Check, cataloged under National Stock Number 4820-01-422-7238, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-422-7238 |
| Primary Part Number | F06-2085B-02TS |
| Item Name | Valve,stop-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Bolt Circle Nominal Diameter | 3.875 INCHES ALL ENDS IN |
| Mounting Position | VERTICAL |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.750 INCHES ALL ENDS IN |
| Valve Size | 1.250 INCHES IN |
| Bonnet Type | OUTSIDE SCREW-YOKE |
| Second Connection Face to Centerline Distance | 3.500 INCHES IN |
| Nominal Outside Diameter | 5.250 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 4 ALL ENDS |
| Bonnet Attachment Method | BOLTED |
| First Connection Face to Centerline Distance | 4.500 INCHES IN |
| Material | STEEL UNS K03504 BODY |
| Material | STEEL CORROSION RESISTING STEM |
| Raised Face Nominal Diameter | 2.500 INCHES ALL ENDS IN |
| Valve Operation Method | MANUAL |
| Raised Face Nominal Height | 0.250 INCHES ALL ENDS IN |
| Nominal Thickness | 0.812 INCHES ALL ENDS 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 |
|---|---|
| F06-2085B-02TS PRIMARY | Velan Valve Corp. (USA) |
| 33311-30 F06-2085B-02TS PRIMARY | Velan Valve Corp. (USA) |
| 53387 P.O. ITEM 001 | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| 53387 | D/9 Drawing number reference only Velan Valve Corp. |
| 33311-30 | D/9 Drawing number reference only Velan Valve Corp. |
NSN 4820-01-422-7238 is a Valve,stop-Check, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-422-7238 has 3 manufacturer part numbers on file: F06-2085B-02TS (Velan Valve Corp.), 33311-30 F06-2085B-02TS (Velan Valve Corp.), 53387 P.O. ITEM 001 (Velan Valve Corp.).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-422-7240, 4820-01-429-1312. Verify interchangeability with system specifications before substitution.
Key specifications for F06-2085B-02TS: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: RAISED STRAIGHT ALL ENDS; Bolt Circle Nominal Diameter: 3.875 INCHES ALL ENDS IN. 21 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.