Low Type Knurled Thumb Screws (DIN653)

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Hardware: a screw with a hexagonal recess in the head that is designed to be used with an Allen wrench <At the bottom of this hole is the Allen screw holding the two halves of the elevation knob together. — Patrick Sweeney, Gunsmithing: Rifles, 1999>

Usually the standard is regarded as DIN912

The company is committed to the production and development of all types of medium and high-end Low Type Knurled Thumb Screws (DIN653). We have strong technical force, advanced processing equipment, and complete production and testing equipment. We use our rich manufacturing experience and advanced design concepts to meet the individual needs of customers and provide comprehensive after-sales services.