The Valve,butterfly, cataloged under National Stock Number 4810-01-321-6402, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-01-321-6402 |
| Primary Part Number | 2498-00-257 26IN VALVE ONLY |
| Item Name | Valve,butterfly |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Leslie Controls, Inc. Dba Leslie Controls Inc |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Bolt Circle Nominal Diameter | 31.750 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Valve Size | 26.000 INCHES IN |
| Nominal Outside Diameter | 29.750 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 8 ALL ENDS |
| Face to Face Distance | 7.000 INCHES IN |
| Material | STEEL BODY |
| Material | STEEL FLOW CONTROL DEVICE |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE SEAT |
| Valve Operation Method | AIR |
| Nominal Thickness | 3.500 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 |
|---|---|
| 2498-00-257 26IN VALVE ONLY PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| 2498-00-257 26IN VALVE ONLY | 3/9 Design control — primary reference Circor Intl Inc |
NSN 4810-01-321-6402 is a Valve,butterfly, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-321-6402 has 1 manufacturer part number on file: 2498-00-257 26IN VALVE ONLY (Leslie Controls, Inc. Dba Leslie Controls Inc).
Key specifications for 2498-00-257 26IN VALVE ONLY: Flange Shape: ROUND WITH HOLES ALL ENDS; Bolt Circle Nominal Diameter: 31.750 INCHES ALL ENDS IN; Connection Type: FLANGE ALL ENDS; Style Designator: STRAIGHT THRU FLANGED ENDS. 13 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.