This M6 knurled nut is a Genuine Hatz part designed for secure, tool‐free fastening on Hatz single‐cylinder diesel engines. With a precise M6 (6 mm) internal thread and a grippy knurled outer edge, it allows quick hand tightening and removal during servicing without damaging studs or covers. Built for durability in vibration‐prone environments, it helps keep engine components properly retained and aligned, supporting reliable operation. Ideal for use on Hatz 1B20 and 1B30 engines, and suitable across the wider 1B series used in compactors, generators, pumps, and other light plant. The accurate thread form and OEM fitment reduce the risk of loosening in service, aiding routine maintenance and day‐to‐day reliability in workshops, site fleets, and DIY repairs.

Key Features:
– Genuine Hatz OEM spare for correct fit and compatibility
– M6 (6 mm) thread for common engine fasteners on 1B series engines
– Knurled outer edge for strong finger grip and tool‐free fitting
– Stable retention under vibration to help prevent loosening in service
– Smooth, repeatable hand tightening for quick maintenance turnaround
– Robust construction suitable for frequent removal and refit
– Helps protect studs and covers by avoiding over‐tightening with tools
– Supplied to OEM specification for consistent quality

Typical Applications:
Used to secure covers, guards, shrouds, and service panels on Hatz 1B engines in compactors, generators, water pumps, and similar machinery. Commonly fitted where regular access is needed, such as air filter housings or recoil starter covers. Useful for workshop maintenance, plant hire servicing, and field repairs where quick, reliable hand fastening is preferred.

Also known as:
Thumb nut, hand nut, finger nut, grip nut, knurled hand nut, serrated-edge nut. These terms refer to nuts designed for finger tightening, offering a textured edge for a firm grip without tools.

Fits Models:
1B20, 1B30, 1B40, 1B50

Alternate Part Numbers:
50454300

Product Specifications