The Disk,valve, cataloged under National Stock Number 4820-01-218-7785, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is English Electric Corp. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-218-7785 |
| Primary Part Number | W1-91 ITEM 85.4 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | English Electric Corp |
| Status | ACTIVE |
| Outside Diameter | 4.950 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Inside Diameter | 2.545 INCHES NOMINAL IN |
| Material | CORK |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| W1-91 ITEM 85.4 | David Brown Gear Systems Limited (GBR) |
| W1-91 ITEM 85.4 | Brown David Vehicle Products Ltd (GBR) |
| 14104 | David Brown Special Products Ltd (GBR) |
| 14104 | Brown David Vehicle Products Ltd (GBR) |
| 14104 | David Brown Gear Systems Limited (GBR) |
| W1-91 ITEM 85.4 | David Brown Special Products Ltd (GBR) |
| W1-91 ITEM 85.4 PRIMARY | English Electric Corp (USA) |
NSN 4820-01-218-7785 is a Disk,valve, manufactured by English Electric Corp, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-218-7785 has 7 cross-referenced part numbers: W1-91 ITEM 85.4 (David Brown Gear Systems Limited), W1-91 ITEM 85.4 (Brown David Vehicle Products Ltd), 14104 (David Brown Special Products Ltd), 14104 (Brown David Vehicle Products Ltd), 14104 (David Brown Gear Systems Limited) and 2 more.
There are 8 known substitutes for 4820-01-218-7785: 6240-00-143-6558, 5130-00-230-4117, 5985-00-242-6896 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for W1-91 ITEM 85.4: Outside Diameter: 4.950 INCHES NOMINAL IN; Style Designator: PLAIN; Inside Diameter: 2.545 INCHES NOMINAL IN; Material: CORK. 5 total characteristics are documented in the Federal Logistics Information System.