The Disk,valve, cataloged under National Stock Number 4820-00-256-3704, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Naval Sea Systems Command. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 3 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 | 4820-00-256-3704 |
| Primary Part Number | BB61S47-085PC136 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Outside Diameter | 4.000 INCHES NOMINAL IN |
| Pressure Rating | 75.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Media for Which Designed | STEAM |
| Style Designator | PLAIN |
| Temp Rating | 150.0 FAHRENHEIT NOMINAL DEGF |
| Inside Diameter | 0.781 INCHES NOMINAL IN |
| Material | RUBBER NATURAL |
| Material Document and Classification | MIL-V-2741, TYPE B, CLASS 1 MIL SPEC SINGLE MATERIAL RESPONSE |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| BB61S47-085PC136 PRIMARY | Naval Sea Systems Command (USA) |
| BB61S47-088PC136 PRIMARY | Naval Sea Systems Command (USA) |
| 54 | M.t. Davidson Company (USA) |
| BB61S47-088PC136 | Naval Ship Systems Command (USA) |
| G89PC136 PRIMARY | M.t. Davidson Company (USA) |
| 4166 | M.t. Davidson Company (USA) |
| BB61S47-085PC136 | Naval Ship Systems Command (USA) |
| G88P136 PRIMARY | M.t. Davidson Company (USA) |
NSN 4820-00-256-3704 is a Disk,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-256-3704 has 8 cross-referenced part numbers: BB61S47-085PC136 (Naval Sea Systems Command), BB61S47-088PC136 (Naval Sea Systems Command), 54 (M.t. Davidson Company), BB61S47-088PC136 (Naval Ship Systems Command), G89PC136 (M.t. Davidson Company) and 3 more.
There are 9 known substitutes for 4820-00-256-3704: 2520-00-447-2221, 5365-00-591-6614, 2805-00-848-2266 and 6 more. Verify interchangeability with system specifications before substitution.
Key specifications for BB61S47-085PC136: Outside Diameter: 4.000 INCHES NOMINAL IN; Pressure Rating: 75.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Media for Which Designed: STEAM; Style Designator: PLAIN. 9 total characteristics are documented in the Federal Logistics Information System.