Factory Cheap Hot Tapered Allen Head Bolt - DIN 912 Internal hexagonal cylindrical screw DIN 912 – Tiancong

Product Description

Cylinder head hexagonal screw, also referred to as hexagonal bolt, cup head screw, hexagonal screw. Grade: 4.8,8.8,10.9,12.9. Its head is internal hexagonal head, also cylindrical. Material is divided into stainless steel and carbon steel. Grade 8.8-Grade 12.9 internal hexagonal cylindrical head screw is called a high strength and high grade internal hexagonal bolt.

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