The Valve,check, cataloged under National Stock Number 4820-00-121-1964, 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 12 commercial cross-references from 8 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 | 4820-00-121-1964 |
| Primary Part Number | MS24423-10 |
| Item Name | Valve,check |
| 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 Class | 3A ALL ENDS A |
| Flow Control Device | POPPET |
| Disk Loading Method | SPRING |
| Valve Operation Method | AUTOMATIC |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Connection Style | FLARELESS ALL ENDS |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Surface Treatment | PASSIVATE |
| Thread Series Designator | UNF ALL ENDS |
| Material Document and Classification | QQ-S-764,TYPE 416-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 0.875 INCHES FIRST END IN |
| Seat Angle | 12.0 DEGREES ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material | STEEL COMP 416 OVERALL |
| Maximum Operating Temp | 450.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| MS24423-10 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| MIL-PRF-25675 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 2C4310 | Crissair Inc Div Esco Technologies (USA) |
| 4820PL1669340 | Jednolity Indeks Materialowy - Uniform Material Index (POL) |
| 98643-10 | Saf Industries Llc Dba Saf Industries Llc Div Garkenyon (USA) |
| M25675-10 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 1112-589972 | Parker Hannifin Corporation Div Aerospace Group Headquarters (USA) |
| 1112-589972 | Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters (USA) |
| 98644-10 | Saf Industries Llc Dba Saf Industries Llc Div Garkenyon (USA) |
| 1112-589972 | Parker-Hannifin Corp Fluidpower Group Mobile Hydraulics Div (USA) |
| 2C2510 | Crissair Inc Div Esco Technologies (USA) |
| 2C6110 | Crissair Inc Div Esco Technologies (USA) |
NSN 4820-00-121-1964 is a Valve,check, 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 4820-00-121-1964 has 12 cross-referenced part numbers: MS24423-10 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), MIL-PRF-25675 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 2C4310 (Crissair Inc Div Esco Technologies), 4820PL1669340 (Jednolity Indeks Materialowy - Uniform Material Index), 98643-10 (Saf Industries Llc Dba Saf Industries Llc Div Garkenyon) and 7 more.
There are 12 known substitutes for 4820-00-121-1964: 4820-00-045-7414, 4820-00-045-7415, 4820-00-402-5133 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for MS24423-10: Thread Class: 3A ALL ENDS A; Flow Control Device: POPPET; Disk Loading Method: SPRING; Valve Operation Method: AUTOMATIC. 16 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-121-1964 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.