The Disk,valve, cataloged under National Stock Number 4820-00-036-1977, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Ashcroft Inc Dba Heise. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-036-1977 |
| Primary Part Number | 85503 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | CANCELLED |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Material | NICKEL ALLOY |
| Shoulder Width | 1.450 INCHES NOMINAL IN |
| Media for Which Designed | STEAM |
| Outside Diameter | 5.188 INCHES NOMINAL IN |
| Thread Series Designator | UNEF |
| Style Designator | PLUG |
| Nominal Thread Size | 1.500 INCHES IN |
| Shoulder Height | 0.500 INCHES NOMINAL IN |
| Thread Class | 2B |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 4824-3135968PC3 | Naval Ship Systems Command (USA) |
| 5VBR72PC3 | Ashcroft Inc Dba Heise (USA) |
| 85503 PRIMARY | Ashcroft Inc Dba Heise (USA) |
NSN 4820-00-036-1977 is a Disk,valve, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-036-1977 has 3 cross-referenced part numbers: 4824-3135968PC3 (Naval Ship Systems Command), 5VBR72PC3 (Ashcroft Inc Dba Heise), 85503 (Ashcroft Inc Dba Heise).
There are 2 known substitutes for 4820-00-036-1977: 4720-01-014-4915, 5360-01-268-0866. Verify interchangeability with system specifications before substitution.
Key specifications for 85503: Seat Angle: 45.0 DEGREES NOMINAL; Material: NICKEL ALLOY; Shoulder Width: 1.450 INCHES NOMINAL IN; Media for Which Designed: STEAM. 11 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-036-1977 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.