Quick answer:
The blade set part numbers found are GX22151 and GY20850. The blade measurement captured is thickness 0.25 in (6 mm).
Blade set part #GX22151 and GY20850
Blade sizethickness 0.25 in (6 mm)
John Deere F680 Mower Blade Size and Part Numbers
| Mower blade set part number | GX22151 and GY20850 |
|---|---|
| Blade thickness | 0.25 in (6 mm) |
| Blade type | high-lift, mulching, standard, and 3-in-1 |
Blade Size Comparison Chart
Blade thickness comparison
John Deere F680 Blade Notes
| Blade note | The John Deere F680 blade listing captured here shows blade set part numbers GX22151 and GY20850 and thickness 0.25 in (6 mm). Do not buy purely from model name if the mower deck or serial range is different |
|---|---|
| Blade type note | For the John Deere F680, blade type is listed as high-lift, mulching, standard, and 3-in-1. Pick the blade style for the job: clean discharge, bagging lift, or mulching |
| Fitment note | For the John Deere F680, use the listed specs as a buying guide, but confirm against the operator manual, parts diagram or old blade before ordering |
Official information note
Mistakes do happen. Blade specs can change by year, mower deck, spindle, serial range and regional parts catalog. Please check the operator manual, old blade stamp, deck tag and official John Deere parts catalog before ordering replacement blades.

