Assorted Alloy Steel Pins with Precision Turned Pins and Stepped Cylindrical Shafts

Pin OD tolerance and finish quality Ra drive the acceptance criteria for alloy steel precision turned pins; a pin OD above the h6 field prevents insertion into the hole, while OD below the m6 lower limit allows wobble in a press-fit bore sized for interference, and finish quality above Ra 0.4 μm reduces the contact fatigue life of both the pin surface and the bore wall. Dongguan Jiarui Hardware Technology (Dongguan, Guangdong, founded 2012) turns and grinds these alloy steel precision turned pins with stepped cylindrical profiles using Swiss machining, turning, and external cylindrical grinding at their north of 2,000 m² Dongguan facility, with pin OD, step concentricity, and surface finish Ra validated to your drawing requirements during first-piece verification. IATF 16949 and ISO 9001 certifications govern production traceability for automotive, motorsport, aerospace, and contract manufacturing precision turned pin applications. For quoting, include pin OD fit class, surface finish Ra, step dimensions, and alloy steel grade — we will provide a production price estimate from our Dongguan team. The plant works across medical equipment, military, and automation sectors.