The Valve,check, cataloged under National Stock Number 4820-01-650-5477, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Deltrol Corp Deltrol Fluid Products Div. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-650-5477 |
| Primary Part Number | C20B |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Deltrol Corp Deltrol Fluid Products Div |
| Status | ACTIVE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Thread Series Designator | NPTF ALL ENDS |
| Material | STEEL BODY |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Seat Angle | 2.0 DEGREES ALL ENDS |
| Nominal Thread Size | 1.8 INCHES ALL ENDS IN |
| Style Designator | STRAIGHT THRU |
| Valve Operation Method | MANUAL |
| Connection Style | INVERTED FLARE (PIPE) SECOND END |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| C20B PRIMARY | Deltrol Corp Deltrol Fluid Products Div (USA) |
NSN 4820-01-650-5477 is a Valve,check, manufactured by Deltrol Corp Deltrol Fluid Products Div, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-650-5477 has 1 cross-referenced part number: C20B (Deltrol Corp Deltrol Fluid Products Div).
There are 2 known substitutes for 4820-01-650-5477: 5961-00-929-2394, 5996-01-254-9503. Verify interchangeability with system specifications before substitution.
Key specifications for C20B: Thread Direction: RIGHT-HAND ALL ENDS; Thread Series Designator: NPTF ALL ENDS; Material: STEEL BODY; Connection Type: THREADED EXTERNAL PIPE ALL ENDS. 9 total characteristics are documented in the Federal Logistics Information System.