The DeWalt 871690 is a genuine OEM replacement spring for SDS-Plus rotary hammers, designed to restore consistent impact action in the DCH333 and DCH363 models. This internal component plays a critical role in the percussion mechanism, controlling the return movement of impact parts to maintain a stable, repeatable hammering cycle. Manufactured from hardened spring steel, it is built to resist fatigue, wear, and permanent set under the sustained loading typical of professional drilling and chiselling in masonry, brick, and concrete. Supplied to original OEM specification, this is a direct-fit replacement requiring no modifications — making it well suited to routine servicing or repair when the original spring shows signs of weakening or damage. Correct spring function helps prevent misfires, supports consistent percussion energy, and contributes to longer intervals between further maintenance. Sourced under part reference 871690, this spring is straightforward to identify in DeWalt parts catalogues and can be installed using basic tools during scheduled service work. It is an appropriate choice for contractors and service technicians looking to maintain tool reliability on demanding sites. Features and Benefits: • Genuine OEM DeWalt (Black & Decker) part — assured fit and compatibility • Hardened spring steel construction resists fatigue, wear, and set • Maintains consistent impact energy for reliable percussion performance • Direct-fit replacement for DCH333 and DCH363 — no modifications required • Suitable for heavy-duty professional use and frequent site operation • Supports SDS-Plus drilling and chiselling in masonry, brick, and concrete • OEM reference 871690 for straightforward identification in parts catalogues • Aids in restoring tool efficiency and extending service intervals

Retailer feed snapshot. Not live-checked or automatically refreshed. Confirm delivery, stock and final price at the retailer.