The Seat,valve, cataloged under National Stock Number 4820-01-244-8439, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Crane Co Div Valve Div. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-244-8439 |
| Primary Part Number | 21267 PIECE 4 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Crane Co Div Valve Div |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.469 INCHES NOMINAL IN |
| Seating Surface Shape | FLAT |
| Material Document and Classification | ASTM A216,GR.WCB ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Material | STEEL OVERALL |
| Style Designator | PLAIN FLANGED |
| Body Outside Diameter | 9.777 INCHES NOMINAL IN |
| Body Inside Diameter | 9.653 INCHES NOMINAL IN |
| Flange Diameter | 10.313 INCHES NOMINAL IN |
| Under Flange Height | 1.318 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| BB61-S48-0309 ALT PIECE 4 | Naval Ship Systems Command (USA) |
| BB61-S48-0309 | Naval Ship Systems Command (USA) |
| 21267 PIECE 4 PRIMARY | Crane Co Div Valve Div (USA) |
| 21267 | Crane Co Div Valve Div (USA) |
NSN 4820-01-244-8439 is a Seat,valve, manufactured by Crane Co Div Valve Div, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-244-8439 has 4 cross-referenced part numbers: BB61-S48-0309 ALT PIECE 4 (Naval Ship Systems Command), BB61-S48-0309 (Naval Ship Systems Command), 21267 PIECE 4 (Crane Co Div Valve Div), 21267 (Crane Co Div Valve Div).
There are 9 known substitutes for 4820-01-244-8439: 5330-00-020-7746, 4210-00-025-1413, 5360-00-200-6358 and 6 more. Verify interchangeability with system specifications before substitution.
Key specifications for 21267 PIECE 4: Flange Seat to Disk End Height: 0.469 INCHES NOMINAL IN; Seating Surface Shape: FLAT; Material Document and Classification: ASTM A216,GR.WCB ASSN STD SINGLE MATERIAL RESPONSE SEAT; Material: STEEL OVERALL. 9 total characteristics are documented in the Federal Logistics Information System.