The Ring,disk Stem, cataloged under National Stock Number 4820-01-220-7739, 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 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-220-7739 |
| Primary Part Number | S1634 |
| Item Name | Ring,disk Stem |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Crane Co Div Valve Div |
| Status | ACTIVE |
| General Characteristics Item Description | NICKEL COPPER ALLOY,ASTM B164,CLASS B |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| DR-33512 PART 8 | Crane Co Div Valve Div (USA) |
| S1634 PRIMARY | Crane Co Div Valve Div (USA) |
| DR-33512-H | Crane Co Div Valve Div (USA) |
NSN 4820-01-220-7739 is a Ring,disk Stem, manufactured by Crane Co Div Valve Div, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-220-7739 has 3 cross-referenced part numbers: DR-33512 PART 8 (Crane Co Div Valve Div), S1634 (Crane Co Div Valve Div), DR-33512-H (Crane Co Div Valve Div).
There are 7 known substitutes for 4820-01-220-7739: 3040-00-590-8491, 4820-01-214-9007, 4820-01-220-5650 and 4 more. Verify interchangeability with system specifications before substitution.
Key specifications for S1634: General Characteristics Item Description: NICKEL COPPER ALLOY,ASTM B164,CLASS B. 1 total characteristics are documented in the Federal Logistics Information System.