The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-197-6861, 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 Coupler Division. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-197-6861 |
| Primary Part Number | MDD-44T-16S-40-A |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division |
| Status | ACTIVE |
| Flow Control Device | PISTON, SPRING LOADED |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Offset Distance | 1.118 INCHES NOMINAL IN |
| Body Style | STRAIGHT THRU W/ OFFSET GIVE "ADQL" ONLY WHEN BOTH ENDS FLANGED |
| First End Style Designator | PLAIN |
| End Connection Quantity | 2 |
| Temp Control Device Type | FUSIBLE |
| First End Connection Type | THREADED INTERNAL PIPE |
| Temp Adjustability | NOT ADJUSTABLE |
| First End Nominal Pipe Size Accommodated | 1.000 INCHES IN |
| Material | ALUMINUM BODY |
| Valve Discharge Flow Rate | 3.0 GALLONS PER MINUTE |
| Adjustable Pressure Range | 1000.0 TO 4000.0 CAMERA MOUNT |
| 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 |
|---|---|
| MDD-44T-16S-40-A PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division (USA) |
NSN 4820-01-197-6861 is a Valve,relief,pressure and Temper, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-197-6861 has 1 manufacturer part number on file: MDD-44T-16S-40-A (Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division).
Key specifications for MDD-44T-16S-40-A: Flow Control Device: PISTON, SPRING LOADED; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL; Offset Distance: 1.118 INCHES NOMINAL IN. 14 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.