The Valve,check, cataloged under National Stock Number 4820-00-835-0137, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-835-0137 |
| Primary Part Number | MIL-PRF-25675 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| Status | ACTIVE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Connection Style | FLARED (TUBE) FIRST END |
| Style Designator | STRAIGHT THRU |
| Nominal Thread Size | 1.312 INCHES FIRST END IN |
| Media for Which Designed | HYDRAULIC FLUID, PHOSPHATE-ESTER BASE SINGLE RESPONSE |
| Flow Control Device | POPPET |
| Thread Quantity Per Inch | 12 FIRST END |
| Mounting Position | HORIZONTAL |
| Disk Loading Method | SPRING |
| Nominal Outside Diameter Tube Accommodated | 7.000 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Thread Class | 3A FIRST END A |
| Surface Treatment | PASSIVATE |
| Thread Direction | RIGHT-HAND FIRST END |
| Thread Series Designator | UNF FIRST END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Test Data Document | 96906-MS24593 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.). |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| MIL-PRF-25675 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 332-2076-070 | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
| MS24593-16 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| 332-2076-070 | Rockwell Collins, Inc. Div Collins Aerospace - Mission Systems (USA) |
NSN 4820-00-835-0137 is a Valve,check, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-835-0137 has 4 cross-referenced part numbers: MIL-PRF-25675 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 332-2076-070 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems), MS24593-16 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 332-2076-070 (Rockwell Collins, Inc. Div Collins Aerospace - Mission Systems).
There are 12 known substitutes for 4820-00-835-0137: 4820-00-045-7414, 4820-00-045-7415, 4820-00-121-1964 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for MIL-PRF-25675: Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Connection Style: FLARED (TUBE) FIRST END; Style Designator: STRAIGHT THRU; Nominal Thread Size: 1.312 INCHES FIRST END IN. 17 total characteristics are documented in the Federal Logistics Information System.