The Friction Wheel,speed Indicator, cataloged under National Stock Number 6605-01-020-9983, is classified within Federal Supply Class 6605 (Navigational Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 6605-01-020-9983 |
| Primary Part Number | 1020B0509 |
| Item Name | Friction Wheel,speed Indicator |
| FSC / FSG | 6605 / 66 — Navigational Instruments |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY,ANODIZED,0/A DIM. 0.250 IN. ID,1.500 IN. OD,0.620 IN. LG,KNURLED FRICTION FACE 0.280 IN. LG W/45 DEG BEVEL,SHANK END 0.620 IN. DIA BY 0.340 IN. LG W/2 HOLES CTR 0.160 IN. FROM END,ONE 0.089 IN. DIA THRU TAPPED 4-40UNC2B,ONE 0.070 IN. DIA BY 0.060 IN. DP IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1020B0509 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| 1023C0503PC3 | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 1023C0503PC3 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
| 1020B0509 REV A | 5/9 Secondary reference Fleck Machine Company, Inc. |
| 1020B0509 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
NSN 6605-01-020-9983 is a Friction Wheel,speed Indicator, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 6605, Navigational Instruments. Status: active.
NSN 6605-01-020-9983 has 2 manufacturer part numbers on file: 1020B0509 (Lockheed Martin Corporation Div Rms), 1023C0503PC3 (Lockheed Martin Corporation Div Rms).
Key specifications for 1020B0509: General Characteristics Item Description: ALUMINUM ALLOY,ANODIZED,0/A DIM. 0.250 IN. ID,1.500 IN. OD,0.620 IN. LG,KNURLED FRICTION FACE 0.280 IN. LG W/45 DEG BEVEL,SHANK END 0.620 IN. DIA BY 0.340 IN. LG W/2 HOLES CTR 0.160 IN. FROM END,ONE 0.089 IN. DIA THRU TAPPED 4-40UNC2B,ONE 0.070 IN. DIA BY 0.060 IN. DP IN. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 6605-01-020-9983 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.