The Seat,valve, cataloged under National Stock Number 4820-01-188-5899, 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 10 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-188-5899 |
| Primary Part Number | 29984 PIECE 4 2IN |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Crane Co Div Valve Div |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.380 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN |
| Flange Diameter | 2.220 INCHES NOMINAL IN |
| Body Outside Diameter | 2.2812 INCHES NOMINAL IN |
| Hardness Rating | 262.0 BRINELL STANDARD MINIMUM AND 302.0 BRINELL STANDARD MAXIMUM OVERALL |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | ASTM A351 GR.CF-8M ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Body Inside Diameter | 1.901 INCHES MINIMUM AND 1.911 INCHES MAXIMUM IN |
| Under Flange Height | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 29984 PIECE 4 2IN PRIMARY | Crane Co Div Valve Div (USA) |
NSN 4820-01-188-5899 is a Seat,valve, manufactured by Crane Co Div Valve Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-188-5899 has 1 manufacturer part number on file: 29984 PIECE 4 2IN (Crane Co Div Valve Div).
Key specifications for 29984 PIECE 4 2IN: Flange Seat to Disk End Height: 0.380 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN; Flange Diameter: 2.220 INCHES NOMINAL IN; Body Outside Diameter: 2.2812 INCHES NOMINAL IN; Hardness Rating: 262.0 BRINELL STANDARD MINIMUM AND 302.0 BRINELL STANDARD MAXIMUM OVERALL. 10 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.