The Gear,spur, cataloged under National Stock Number 3020-00-005-7500, 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 Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. Government technical data includes 16 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-005-7500 |
| Primary Part Number | B3017C |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic |
| Status | ACTIVE |
| Keyway Nominal Width | 0.375 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.813 INCHES BOTH ENDS IN |
| Teeth Quantity | 41 |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.110 INCHES FIRST END IN |
| Hardness Rating | 50.0 ROCKWELL C MINIMUM AND 64.0 ROCKWELL C MAXIMUM BODY |
| Hardness Rating | 60.0 ROCKWELL C MINIMUM AND 64.0 ROCKWELL C MAXIMUM TEETH |
| Style Designator | ONE PROTRUDING HUB, ONE FLUSH HUB |
| Pitch Diameter | 5.1250 INCHES NOMINAL IN |
| Tooth Form | STUB |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 5.489 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.039 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 8620H OVERALL |
| Face Nominal Width | 0.880 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3020-00-005-7500 is a Gear,spur, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-005-7500 has 2 manufacturer part numbers on file: B3017C (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic), 5198770 (Rolls-Royce Solutions America Inc).
Key specifications for B3017C: Keyway Nominal Width: 0.375 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.813 INCHES BOTH ENDS IN; Teeth Quantity: 41; Bore Style: W/ KEYWAY BOTH ENDS. 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.