The Valve,check, cataloged under National Stock Number 4820-01-338-2018, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Deltrol Corp. Government technical data includes 11 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-338-2018 |
| Primary Part Number | EC20B 1/4IN |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Deltrol Corp |
| Status | ACTIVE |
| Disk Loading Method | SPRING |
| Thread Series Designator | NPTF ALL ENDS |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Material | COPPER ALLOY BODY |
| Valve Operation Method | AUTOMATIC |
| Flow Control Device | BALL |
| Style Designator | STRAIGHT THRU |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| EC20 | Deltrol Corp (USA) |
| EC20B 1/4IN PRIMARY | Deltrol Corp (USA) |
| F-25336 PIECE 103 | Stafford Machinery Corp (USA) |
NSN 4820-01-338-2018 is a Valve,check, manufactured by Deltrol Corp, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-338-2018 has 3 cross-referenced part numbers: EC20 (Deltrol Corp), EC20B 1/4IN (Deltrol Corp), F-25336 PIECE 103 (Stafford Machinery Corp).
There are 6 known substitutes for 4820-01-338-2018: 5340-00-660-5248, 4330-01-073-6064, 5340-01-121-4173 and 3 more. Verify interchangeability with system specifications before substitution.
Key specifications for EC20B 1/4IN: Disk Loading Method: SPRING; Thread Series Designator: NPTF ALL ENDS; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Thread Direction: RIGHT-HAND ALL ENDS. 11 total characteristics are documented in the Federal Logistics Information System.