The Valve,check, cataloged under National Stock Number 4820-01-042-0137, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Eaton Aerospace, Llc Dba Jackson South. Government technical data includes 21 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-042-0137 |
| Primary Part Number | DF10P1-16-5-20 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Eaton Aerospace, Llc Dba Jackson South |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | RECTANGULAR WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Nominal Length | 4.000 INCHES ALL ENDS IN |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | FLANGE FIRST END |
| Style Designator | ANGLE FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.625 INCHES ALL ENDS IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 1.500 INCHES IN |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 2.750 INCHES ALL ENDS IN |
| Second Connection Face to Centerline Distance | 3.000 INCHES IN |
| Mounting Facility | BRACKET(S) |
| Bolt Hole Quantity | 4 ALL ENDS |
| Surface Treatment | PAINT |
| Nominal Width | 4.000 INCHES ALL ENDS IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 2.750 INCHES ALL ENDS IN |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| First Connection Face to Centerline Distance | 3.000 INCHES IN |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| DF10P1-16-5-20 PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
| DF10P1-16-5-20 | Vickers S Y S Inc (CAN) |
| Reference | Meaning |
|---|---|
| DF10P1-16-5-20 | 5/9 Secondary reference Telco Inc |
| DF10P1-16-5-20 | 5/9 Secondary reference Pabco Fluid Power Co Dba Sunsource - Pabco Div Sunsource |
| DF10P1-16-5-10 | 5/9 Secondary reference Eaton Aerospace, Llc Dba Jackson South |
NSN 4820-01-042-0137 is a Valve,check, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-042-0137 has 2 manufacturer part numbers on file: DF10P1-16-5-20 (Eaton Aerospace, Llc Dba Jackson South), DF10P1-16-5-20 (Vickers S Y S Inc).
Key specifications for DF10P1-16-5-20: Flow Control Device: DISK; Flange Shape: RECTANGULAR WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Nominal Length: 4.000 INCHES ALL ENDS IN. 21 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.