The Disk,valve, cataloged under National Stock Number 4820-00-647-1870, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Grove Valve Operations. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-647-1870 |
| Primary Part Number | 20519 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Grove Valve Operations |
| Status | CANCELLED |
| Under Flange Height | 0.344 INCHES NOMINAL IN |
| Flange Diameter | 0.312 INCHES NOMINAL IN |
| Seat Angle | 30.0 DEGREES NOMINAL |
| Shank Diameter | 0.156 INCHES NOMINAL IN |
| Material | STEEL |
| Outside Diameter | 0.312 INCHES NOMINAL IN |
| Style Designator | CONE CHECK |
| Flange Seat to Disk End Height | 0.312 INCHES NOMINAL IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
NSN 4820-00-647-1870 is a Disk,valve, manufactured by Grove Valve Operations, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-647-1870 has 2 cross-referenced part numbers: 20519 (Grove Valve Operations), 8526085 (Us Army Aviation and Missile Command).
There are 4 known substitutes for 4820-00-647-1870: 5950-00-053-4533, 5340-00-399-7867, 2590-01-244-9648 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for 20519: Overall Height: 0.656 INCHES NOMINAL IN; Under Flange Height: 0.344 INCHES NOMINAL IN; Special Features: WITH RECESSED HEX WRENCHING FACILITY; Flange Diameter: 0.312 INCHES NOMINAL IN. 10 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-647-1870 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.