The Valve,check, cataloged under National Stock Number 4820-01-642-1949, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupling Division. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-642-1949 |
| Primary Part Number | DT-750-MFMF-200 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupling Division |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Valve Size | 0.750 INCHES IN |
| Nominal Thread Size | 1.0625 INCHES ALL ENDS IN |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | STEEL BODY |
| Thread Series Designator | UN ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 10050675 | General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp (USA) |
| DT-750-MFMF-200 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupling Division (USA) |
| Reference | Meaning |
|---|---|
| DT-750-MFMF-200 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4820-01-642-1949 is a Valve,check, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupling Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-642-1949 has 2 manufacturer part numbers on file: 10050675 (General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp), DT-750-MFMF-200 (Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupling Division).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-731-8109. Verify interchangeability with system specifications before substitution.
Key specifications for DT-750-MFMF-200: Connection Style: FLARED (TUBE) ALL ENDS; Connection Type: THREADED EXTERNAL TUBE ALL ENDS; Style Designator: STRAIGHT THRU; Valve Size: 0.750 INCHES IN. 10 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.