The Valve,diaphragm,stop, cataloged under National Stock Number 4820-01-288-6662, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-288-6662 |
| Item Name | Valve,diaphragm,stop |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 3.875 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.625 INCHES ALL ENDS IN |
| Valve Size | 1.500 INCHES IN |
| Bonnet Type | OUTSIDE SCREW-YOKE |
| Nominal Outside Diameter | 5.000 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 4 ALL ENDS |
| Bonnet Attachment Method | BOLTED |
| Face to Face Distance | 6.000 INCHES IN |
| Material | IRON BODY |
| Material | STEEL STEM |
| Valve Operation Method | MANUAL |
| Nominal Thickness | 0.688 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 |
| Reference | Meaning |
|---|---|
| CSVA5-12 1 1/2INCH | 3/9 Design control — primary reference Rockwell Intl Corp Flow Control Div |
| 11-51-004-1 1/2 | C/1 Advisory reference — outside the item-of-supply concept Rockwell Intl Corp Flow Control Div |
| 1 1/2IN 506-1-N1/1552 | 5/9 Secondary reference Rockwell Intl Corp Flow Control Div |
| CSVA5-12 | D/9 Drawing number reference only Rockwell Intl Corp Flow Control Div |
| CSVA5-12 ITEM 13 | 5/9 Secondary reference Tri-State Technical Sales Corp |
| 11-51-004-1 1/2IN | 5/9 Secondary reference Tri-State Technical Sales Corp |
NSN 4820-01-288-6662 is a Valve,diaphragm,stop, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-325-9015. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-288-6662: Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Bolt Circle Nominal Diameter: 3.875 INCHES ALL ENDS IN; Connection Type: FLANGE ALL ENDS. 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.