AIC Tillage | Notched Concave Disc Blade | 20" x 6.5mm | Replaces John Deere NS90340002 | AICT-0038
AIC Tillage AICT-0038 | 20" x 6.5mm notched concave disc blade with a 4-bolt flat-center mounting design, built as a direct replacement for John Deere OEM NS90340002 for high-speed tillage and vertical tillage applications.
This heavy-duty notched concave disc blade is designed for effective soil penetration, residue cutting, and soil mixing in demanding field conditions. The concave profile helps move and lift soil, while the notched edge improves bite and cutting action in heavier residue and firmer ground.
The 20" diameter and 6.5mm thickness make this blade a strong fit for modern high-speed discs and vertical tillage tools where durability, residue sizing, and consistent tillage performance are critical. This blade is commonly used across multiple brands when the diameter, thickness, and 4-bolt flat-center mounting pattern match the original blade.
Why notched concave blades?
The concave blade profile helps lift and move soil for improved mixing, while the notched edge cuts residue more aggressively for better incorporation and field finish in high-speed tillage conditions.
Compatibility & Application Notes
- Direct replacement for John Deere NS90340002
and 5NS90340002. - Also cross-referenced to selected Norwood, Degelman, and Kinze high-speed tillage applications.
- Fits blades using a 20" diameter, 6.5mm thickness,
and 4-bolt flat-center mounting pattern. - Always verify blade diameter, thickness,
bolt pattern, and mounting dimensions before ordering.
Product Specifications
| Specification | Value |
|---|---|
| Part Number | AICT-0038 |
| OEM Reference |
NS90340002 5NS90340002 |
| Brand | AIC Tillage |
| Disc Type | Notched Concave Disc Blade |
| Diameter |
20" (508 mm) |
| Thickness |
6.5mm (approx. 1/4") |
| Mounting Style | 4-Bolt Flat Center |
| Bolt Pattern | 4-hole mount on 7" flat center commonly referenced with 5-1/4" outer PCD and 3-7/8" inner PCD |
| Center Hole | N/A flat-center bolt-on design |
| Application | High-speed tillage discs and vertical tillage equipment |
Fits Machine Models
| Brand | Model |
|---|---|
| John Deere |
2680H High-Performance Disc HSD Series HSD25, HSD29, HSD32, HSD35, HSD39, HSD42, HSD45 |
| Norwood |
Kwik-Till HSD800, HSD1000, HSD1600, HSD1775, HSD2100, HSD2450, HSD2500, HSD3000, HSD3500, HSD4000, HASD4500 |
| Degelman |
Pro-Till 20, 26, 33, 40 |
| Kinze |
Mach Till High-speed tillage applications using matching 20" x 6.5mm 4-bolt flat-center blades |
Cross Reference
| Brand / System | Part Number | Notes |
|---|---|---|
| John Deere (OEM) | NS90340002, 5NS90340002 | Primary OEM references for 20" x 6.5mm notched concave blade used on John Deere high-speed discs |
| Norwood |
90-34-0002, 18354A 18199A, 19028A |
Direct replacement references for Kwik-Till applications |
| Degelman | 143557, 143568 | Common replacement references for Pro-Till high-speed disc systems |
| Kinze | GD143553 | Referenced for Mach Till applications using matching 20" x 6.5mm 4-bolt flat-center blade |
| AIC Tillage | AICT-0038 |
AICT-0038 is the listed AIC Tillage part sold by AftermarketFARM.com, quality-verified for reliable fit, function, and field performance |
| Aftermarket Cross Reference |
SH40002, RLT126566C5, B45-2746 522-150-1040, 108112, 1002681 OS-99920001, 20X6.5N10 |
Additional aftermarket part numbers shown for cross-reference and identification purposes. Manufacturing standards and quality may vary by supplier. Verify blade diameter, thickness, and mounting pattern before ordering |