The Gerotor Assembly,rotary, cataloged under National Stock Number 4320-00-131-2011, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-131-2011 |
| Item Name | Gerotor Assembly,rotary |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,MIL-S-8690 COMP AISI 8620,ROCKWELL HARDNESS RATING A SCALE 80 MIN INNER GEROTOR,ROCKWELL HARDNESS RATING 15N SCALE 85 MIN OUTER GEROTOR,DIM.,FOUR POINTED STAR INNER GEROTOR 0.4995 IN. MIN,0.5000 IN. MAX W WITH NO. 4065 BROACH CURVE BETWEEN POINTS,0.4995 IN. MIN,0.5000 IN. MAX ID,ONE INTERNALKEYWAY ON ID 0.128 IN. W ON VERTICAL CENTERLINE 0.063 IN. DEEP,1.6222 IN. MIN,1.6227 IN. MAX OD OUTER GEROTOR,0.4995 IN. MIN,0.5000 IN. MAX W,FIVE POINTED STAR ID W/NO. 4065 BROACH CURVE BETWEEN POINTS,MAX SURFACE FINISH,LEFT AND RIGHT FACES OF INNER AND OUTER GEROTOR LAPPED IN |
| 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 |
|---|---|
| 24-45100-0019-1 | 3/2 Design control — primary reference U.S. Government activity |
| GA7022 | 5/9 Secondary reference U.S. Government activity |
NSN 4320-00-131-2011 is a Gerotor Assembly,rotary, classified under FSC 4320, Power and Hand Pumps. Status: active.
Key specifications for 4320-00-131-2011: General Characteristics Item Description: STEEL,MIL-S-8690 COMP AISI 8620,ROCKWELL HARDNESS RATING A SCALE 80 MIN INNER GEROTOR,ROCKWELL HARDNESS RATING 15N SCALE 85 MIN OUTER GEROTOR,DIM.,FOUR POINTED STAR INNER GEROTOR 0.4995 IN. MIN,0.5000 IN. MAX W WITH NO. 4065 BROACH CURVE BETWEEN POINTS,0.4995 IN. MIN,0.5000 IN. MAX ID,ONE INTERNALKEYWAY ON ID 0.128 IN. W ON VERTICAL CENTERLINE 0.063 IN. DEEP,1.6222 IN. MIN,1.6227 IN. MAX OD OUTER GEROTOR,0.4995 IN. MIN,0.5000 IN. MAX W,FIVE POINTED STAR ID W/NO. 4065 BROACH CURVE BETWEEN POINTS,MAX SURFACE FINISH,LEFT AND RIGHT FACES OF INNER AND OUTER GEROTOR LAPPED IN; End Item Identification: 4320-01-128-1623. 1 specification is 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.