Tension Adjusting Knob Part Number: 40417-009
Compatible with the following Model:
- WEN 40417 40V Max Lithium Ion 16-Inch Brushless Chainsaw with 4Ah Battery and Charger
For CA residents, click here for Proposition 65 information
![[40417-009] Tension Adjusting Knob for WEN 40417](https://www.bestprohardwaresupply.com/wp-content/uploads/2026/10/40417-009-tension-adjusting-knob-wen-40417.webp)
[40417-009] Tension Adjusting Knob for WEN 40417
Original price was: $5.07.$3.69Current price is: $3.69.
Sale!Related products
Sale!
![[DG4500iX-179] Trigger for WEN DG4500iX](https://www.bestprohardwaresupply.com/wp-content/uploads/2026/10/dg4500ix-179-trigger-wen-dg4500ix.webp)
[DG4500iX-179] Trigger for WEN DG4500iX
Original price was: $5.66.$3.48Current price is: $3.48.
Sale!
![[AA2225-021] Sports Needle for WEN AA2225](https://www.bestprohardwaresupply.com/wp-content/uploads/2026/10/aa2225-021-sports-needle-wen-aa2225.webp)
[AA2225-021] Sports Needle for WEN AA2225
Original price was: $4.96.$2.74Current price is: $2.74.
Sale!
![[DF680iX-124.1] Spark Arrestor for WEN DF680iX](https://www.bestprohardwaresupply.com/wp-content/uploads/2026/10/df680ix-124-1-spark-arrestor-wen-df680ix.webp)
[DF680iX-124.1] Spark Arrestor for WEN DF680iX
Original price was: $5.76.$3.84Current price is: $3.84.
Sale!
![[DF680iX-079] LPG Regulator And Hose Assembly for WEN DF680iX](https://www.bestprohardwaresupply.com/wp-content/uploads/2026/10/df680ix-079-lpg-regulator-hose-assembly-wen-df680ix.webp)
[DF680iX-079] LPG Regulator And Hose Assembly for WEN DF680iX
Original price was: $51.82.$39.01Current price is: $39.01.
Sale!
![[56480iX-067] Battery, 12V 1.6Ah, Li-Ion for WEN 56480iX and DF480iX](https://www.bestprohardwaresupply.com/wp-content/uploads/2026/10/56480ix-067-battery-12v-1-6ah-li-ion-wen-56480ix-df480ix.webp)
[56480iX-067] Battery, 12V 1.6Ah, Li-Ion for WEN 56480iX and DF480iX
Original price was: $30.67.$15.66Current price is: $15.66.
Sale!
![[AA2225-022] Short Nozzle for WEN AA2225](https://www.bestprohardwaresupply.com/wp-content/uploads/2026/10/aa2225-022-short-nozzle-wen-aa2225.webp)
[AA2225-022] Short Nozzle for WEN AA2225
Original price was: $4.96.$3.92Current price is: $3.92.
Sale!
![[DF8000X-178] Starter Motor Assembly for WEN DF8000X](https://www.bestprohardwaresupply.com/wp-content/uploads/2026/10/df8000x-178-starter-motor-assembly-wen-df8000x.webp)
[DF8000X-178] Starter Motor Assembly for WEN DF8000X
Original price was: $51.62.$35.17Current price is: $35.17.
Sale!
![[20691-069] Inner Blade Flange for WEN 20691](https://www.bestprohardwaresupply.com/wp-content/uploads/2026/10/20691-069-inner-blade-flange-wen-20691.webp)
