The Cock,poppet Drain, cataloged under National Stock Number 4820-00-203-6321, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 14 commercial cross-references from 11 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-203-6321 |
| Primary Part Number | MS29528-6 |
| Item Name | Cock,poppet Drain |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| Status | CANCELLED |
| Thread Quantity Per Inch | 18 FIRST END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Style | PLAIN (TUBE) FIRST END |
| Thread Direction | RIGHT-HAND FIRST END |
| Supplementary Features | APPL TO ACFT,TYPE F-5,HH-52,H-34 |
| Valve Operation Method | AUTOMATIC |
| Style Designator | STRAIGHT THRU |
| Supplementary Features | APPL TO ACFT,TYPE F-5,HH-52,H-34 |
| Thread Class | 3A FIRST END A |
| Thread Series Designator | UNF FIRST END |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Style Designator | STRAIGHT THRU |
| Thread Quantity Per Inch | 18 FIRST END |
| Flow Control Device | POPPET |
| Thread Series Designator | UNF FIRST END |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| MS29528-6 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| 575B-6AS | Auto-Valve, Inc (USA) |
| 49F9798-53 | Department of the Air Force (USA) |
| 71D-6 | Auto-Valve, Inc (USA) |
| 49F9798-53 | Army Air Force Drawings Under Custodianship of the Air Force |
| MIL-V-25023 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 83501-2 | Parker Hannifin Corporation Div Aerospace Group Headquarters (USA) |
| 2D100A | Allen Aircraft Products Inc (USA) |
| 49F9798-53 | Fyr-Fyter Co Inc (USA) |
| CCA-4350 | Curtis Superior Valve Co., Inc. Dba Curtis Superior Valve Co (USA) |
| BJ1000AS2 | Auto-Valve, Inc (USA) |
| S1630-63045 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| 159647 | Eaton Aerospace, Llc Dba Jackson South (USA) |
| 2D100B | Allen Aircraft Products Inc (USA) |
NSN 4820-00-203-6321 is a Cock,poppet Drain, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-203-6321 has 14 cross-referenced part numbers: MS29528-6 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 575B-6AS (Auto-Valve, Inc), 49F9798-53 (Department of the Air Force), 71D-6 (Auto-Valve, Inc), 49F9798-53 (Army Air Force Drawings Under Custodianship of the Air Force) and 9 more.
There are 12 known substitutes for 4820-00-203-6321: 4820-00-097-0325, 4730-00-099-5406, 4820-00-202-6014 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for MS29528-6: Thread Quantity Per Inch: 18 FIRST END; Connection Type: THREADED EXTERNAL TUBE FIRST END; Connection Style: PLAIN (TUBE) FIRST END; Thread Direction: RIGHT-HAND FIRST END. 16 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-203-6321 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.