The Piston,pump, cataloged under National Stock Number 4320-00-005-2020, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-005-2020 |
| Item Name | Piston,pump |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Status | ACTIVE |
| Distance Between Pin Bosses | 0.375 INCHES NOMINAL IN |
| Integral Connecting Rod | NOT INCLUDED |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Diameter | 1.125 INCHES NOMINAL IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | LOCKED |
| Oil Groove | NOT INCLUDED |
| Head Style | DISH |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Pinhole Diameter | 0.218 INCHES NOMINAL IN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | PLASTIC |
| Skirt Type | SEMISPLIT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 113-139-002 | 3/9 Design control — primary reference Edo |
| 113-139-002 | 5/9 Secondary reference Era Mfg Co Div of Ocean Technology Inc |
| 113-139-003 | 5/9 Secondary reference Era Mfg Co Div of Ocean Technology Inc |
| 113-139-003 | 5/9 Secondary reference Edo |
NSN 4320-00-005-2020 is a Piston,pump, classified under FSC 4320, Power and Hand Pumps. Status: active.
Key specifications for 4320-00-005-2020: Overall Height: 1.562 INCHES NOMINAL IN; Distance Between Pin Bosses: 0.375 INCHES NOMINAL IN; Integral Connecting Rod: NOT INCLUDED; Retaining Ring Groove: INCLUDED. 16 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.