The Gear,worm, cataloged under National Stock Number 3020-01-154-9890, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. Government technical data includes 30 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 | 3020-01-154-9890 |
| Primary Part Number | 5569939 |
| Item Name | Gear,worm |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| Thread Form Direction | RIGHT-HAND |
| Bore Nominal Diameter | 1.150 INCHES FIRST END IN |
| Second Step Nominal Diameter | 1.437 INCHES FIRST END IN |
| Surface Treatment Document and Classification | MIL-STD-171 FN 3.3.1 MIL STD ALL TREATMENT RESPONSES OVERALL |
| Counterbore Nominal Diameter | 1.255 INCHES SECOND COUNTERBORE SECOND END IN |
| Counterbore Nominal Diameter | 1.337 INCHES FIRST COUNTERBORE SECOND END IN |
| Bore Style | W/STEPPED COUNTERBORE FIRST END |
| Mounting Hole Type and Quantity | 4 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 2.032 INCHES FIRST END IN |
| First Step Nominal Length | 0.328 INCHES FIRST END IN |
| Face Type | CONCAVE |
| Precision Classification | QUALITY NUMBER 3 |
| Mating Pitch Diameter | 0.5000 INCHES NOMINAL IN |
| Second Step Nominal Length | 1.392 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB, RECESSED BODY |
| Material Document and Classification | ASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Pitch Diameter | 2.5180 INCHES NOMINAL IN |
| First Step Nominal Diameter | 1.430 INCHES FIRST END IN |
| Features Provided | RETAINING RING GROOVE |
| Hub Style Designator | 2 STEPS FIRST END |
| Thread Form Quantity | 64 |
| Mounting Hole Nominal Thread Size | 0.086 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| End Nominal Length | 0.312 INCHES FIRST END IN |
| Nominal Outside Diameter | 2.606 INCHES IN |
| Surface Treatment | OXIDE FILM AND CHROMATE OVERALL |
| End Nominal Diameter | 1.399 INCHES FIRST END IN |
| Pressure Angle | 27.5000 DEGREES |
| Material | STEEL COMP 1035 OR STEEL COMP 1045 OVERALL |
| Counterbore Nominal Depth | 0.547 INCHES FIRST COUNTERBORE SECOND END IN |
| Counterbore Nominal Depth | 1.347 INCHES SECOND COUNTERBORE SECOND END IN |
| 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 |
|---|---|
| 5569939 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
NSN 3020-01-154-9890 is a Gear,worm, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-154-9890 has 1 manufacturer part number on file: 5569939 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for 5569939: Thread Form Direction: RIGHT-HAND; Bore Nominal Diameter: 1.150 INCHES FIRST END IN; Second Step Nominal Diameter: 1.437 INCHES FIRST END IN; Surface Treatment Document and Classification: MIL-STD-171 FN 3.3.1 MIL STD ALL TREATMENT RESPONSES OVERALL. 30 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.