The Seat,valve, cataloged under National Stock Number 4820-01-124-5319, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Crane Co Div Valve Div. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-124-5319 |
| Primary Part Number | K-9505-B PIECE 13 3IN |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Crane Co Div Valve Div |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.490 INCHES MINIMUM AND 0.708 INCHES MAXIMUM IN |
| Flange Diameter | 3.913 INCHES NOMINAL IN |
| Thread Length | 0.650 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Body Stepped Inside Diameter | 2.500 INCHES NOMINAL FIRST STEP IN |
| Body Stepped Inside Diameter | 3.000 INCHES NOMINAL SECOND STEP IN |
| Style Designator | THREADED FLANGED |
| Material Document and Classification | STM A351,GR.CF-8M ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Nominal Thread Size | 3.500 INCHES SINGLE THREADED PORTION IN |
| Under Flange Height | 0.843 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Seating Surface Shape | RADIAL |
| 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 |
|---|---|
| D11784 | Crane Co Div Valve Div (USA) |
| K-9505-B PIECE 13 3IN PRIMARY | Crane Co Div Valve Div (USA) |
| Reference | Meaning |
|---|---|
| K-9505-B | D/9 Drawing number reference only Crane Co Div Valve Div |
NSN 4820-01-124-5319 is a Seat,valve, manufactured by Crane Co Div Valve Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-124-5319 has 2 manufacturer part numbers on file: D11784 (Crane Co Div Valve Div), K-9505-B PIECE 13 3IN (Crane Co Div Valve Div).
Key specifications for K-9505-B PIECE 13 3IN: Flange Seat to Disk End Height: 0.490 INCHES MINIMUM AND 0.708 INCHES MAXIMUM IN; Flange Diameter: 3.913 INCHES NOMINAL IN; Thread Length: 0.650 INCHES NOMINAL SINGLE THREADED PORTION IN; Body Stepped Inside Diameter: 2.500 INCHES NOMINAL FIRST STEP IN. 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.