The Valve,check, cataloged under National Stock Number 4820-00-191-6873, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Martin-Decker Totco, Inc Dba M/d Totco. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-191-6873 |
| Primary Part Number | F53 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Martin-Decker Totco, Inc Dba M/d Totco |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Disk Loading Method | SPRING |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Material | COPPER ALLOY OVERALL |
| Flow Control Device | POPPET |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Valve Operation Method | AUTOMATIC |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Material | COPPER ALLOY OVERALL |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Thread Series Designator | NPT ALL ENDS |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Thread Series Designator | NPT ALL ENDS |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-191-6873 is a Valve,check, manufactured by Martin-Decker Totco, Inc Dba M/d Totco, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-191-6873 has 2 cross-referenced part numbers: F53 (Martin-Decker Totco, Inc Dba M/d Totco), F53 (Ametek Inc.).
There are 4 known substitutes for 4820-00-191-6873: 6695-00-013-4805, 3110-00-156-4719, 5950-00-487-1991 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for F53: Style Designator: STRAIGHT THRU; Nominal Thread Size: 0.250 INCHES ALL ENDS IN; Disk Loading Method: SPRING; Connection Style: PLAIN (PIPE) ALL ENDS. 15 total characteristics are documented in the Federal Logistics Information System.