Stanley N437890 Spare Part - SPRING
Original DeWalt replacement spring N437890 — a small ball/detent spring used in the nosepiece/quick‑release bit holder of DeWalt impact drivers to maintain positive bit retention and reliable release.
This genuine DeWalt spring is made from hardened spring steel and is manufactured to the original dimensions so it seats correctly behind the detent ball in the chuck assembly; replacing a worn or broken spring restores firm bit holding and smooth quick‑release action.
Approximate dimensions: outside diameter ~0.54–0.65" and wire size about 0.030" (small — a single replacement spring is included). Use these specs to confirm fit with your nosepiece before installation.
Example compatible models (representative list): DCF887, DCF888, DCF787, DCF809, DCF601, DCF801 and related MCF/CMCF series impact drivers. Check your tool’s parts list or model type plate, but these are the common DeWalt drivers that use part N437890.
Includes: (1) original DeWalt N437890 ball/detent spring — ready to drop into the chuck assembly to get your bit retention working like new.
Compatible models this part will fit:
- Stanley SBI810D2K IMPACT DRIVER
- Stanley SBI820M2K IMPACT DRIVER
- Stanley SBI820K CORDLESS DRILL/DRIVER
- DeWalt DCF7871B IMPACT DRIVER
- DeWalt DCF7871D1 IMPACT DRIVER
- DeWalt DCF887
- DeWalt DCF887H2A
- DeWalt DCF7871D2A
- DeWalt DCF809H2T
- Stanley SBI810M2K
- DeWalt DCF809D2T
- DeWalt DCF809N
- DeWalt DCF887D2
- Stanley SBF810
- DeWalt DCF7871N
- DeWalt DCF7871P2
- DeWalt DCF809P1
- DeWalt DCF809D2
- DeWalt DCF887P1A
- DeWalt DCF601F2
- DeWalt DCF809M2T
- DeWalt DCF809L2T
- Stanley SBI810B
- DeWalt DCF801D2K
- Stanley SFMCF820B
- DeWalt DCF888
- DeWalt DCF801B
- DeWalt DCF7871D2
- Stanley SFMCF810D1K
- DeWalt DCF887M2
Showing first 30 compatible models. Contact us for full compatibility info.
