Type B Heavy Thumb Screw with Cone Point

Our company's rivet joint CE, hollow wall anchors, metric bolt sizes are mainly export-oriented, our company in line with the development concept of 'survival by quality, development by reputation' and has achieved good economic and social benefits. We offer OEM services and replacement parts to meet the varying needs of our customers. We sincerely welcome customers all over the world to contact us for business cooperation.

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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

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