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 - SBI810D2K Type 1
- Stanley SBI820M2K IMPACT DRIVER - SBI820M2K Type 1
- Stanley SBI820K CORDLESS DRILL/DRIVER - SBI820K Type 1
- DeWalt DCF7871B IMPACT DRIVER - DCF7871B Type 2
- DeWalt DCF7871D1 IMPACT DRIVER - DCF7871D1 Type 2
- DeWalt DCF887 - DCF887 Type 1
- DeWalt DCF887H2A - DCF887H2A Type 1
- DeWalt DCF7871D2A - DCF7871D2A Type 2
- DeWalt DCF809H2T - DCF809H2T Type 1
- Stanley SBI810M2K - SBI810M2K Type 1
- DeWalt DCF809D2T - DCF809D2T Type 2
- DeWalt DCF809N - DCF809N Type 2
- DeWalt DCF887D2 - DCF887D2 Type 1
- Stanley SBF810 - SBF810 Type 1
- DeWalt DCF7871N - DCF7871N Type 2
- DeWalt DCF7871P2 - DCF7871P2 Type 2
- DeWalt DCF809P1 - DCF809P1 Type 2
- DeWalt DCF809D2 - DCF809D2 Type 2
- DeWalt DCF887P1A - DCF887P1A Type 1
- DeWalt DCF601F2 - DCF601F2 Type 1
- DeWalt DCF809M2T - DCF809M2T Type 2
- DeWalt DCF809L2T - DCF809L2T Type 2
- Stanley SBI810B - SBI810B Type 1
- DeWalt DCF801D2K - DCF801D2K Type 1
- Stanley SFMCF820B - SFMCF820B Type 1
- DeWalt DCF888 - DCF888 Type 1
- DeWalt DCF801B - DCF801B Type 1
- DeWalt DCF7871D2 - DCF7871D2 Type 2
- Stanley SFMCF810D1K - SFMCF810D1K Type 1
- DeWalt DCF887M2 - DCF887M2 Type 3
Showing first 30 compatible models. Contact us for full compatibility info.
