The Seat,valve, cataloged under National Stock Number 4820-00-210-5541, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 11 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 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 | 4820-00-210-5541 |
| Primary Part Number | 113646 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.446 INCHES MINIMUM AND 0.449 INCHES MAXIMUM IN |
| Flange Diameter | 3.069 INCHES MINIMUM AND 3.070 INCHES MAXIMUM IN |
| Body Outside Diameter | 2.586 INCHES MINIMUM AND 2.590 INCHES MAXIMUM IN |
| Hardness Rating | 90.0 ROCKWELL B MINIMUM AND 105.0 ROCKWELL B MAXIMUM BODY |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | AMS 5700 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Body Inside Diameter | 2.523 INCHES MINIMUM AND 2.533 INCHES MAXIMUM IN |
| Under Flange Height | 0.136 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| Material | STEEL BODY |
| Seat Angle in Deg | 45.000 NOMINAL |
| Seating Surface Shape | ANGULAR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4820-00-210-5541 is a Seat,valve, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-210-5541 has 2 manufacturer part numbers on file: 113646 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 113646 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.).
2 possible matches (shared part number, not a government interchangeability claim): 5360-00-868-7973, 2805-01-104-6784. Verify interchangeability with system specifications before substitution.
Key specifications for 113646: Flange Seat to Disk End Height: 0.446 INCHES MINIMUM AND 0.449 INCHES MAXIMUM IN; Flange Diameter: 3.069 INCHES MINIMUM AND 3.070 INCHES MAXIMUM IN; Body Outside Diameter: 2.586 INCHES MINIMUM AND 2.590 INCHES MAXIMUM IN; Hardness Rating: 90.0 ROCKWELL B MINIMUM AND 105.0 ROCKWELL B MAXIMUM BODY. 11 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.