A nut is a type of hardware fastener with a threaded hole. Nuts are almost always used opposite a mating bolt to fasten a stack of parts together.same as bolt,the nuts can be made by carbon steel,alloy steel,stainless steel ,brass etc and are graded with strength ratings compatible with their respective bolts,such as , an SAE class 5 nut can support the proof load of an SAE class 5 bolt.

TopKun is  a pofessional supplier of nuts products both in IFI and DIN standard,such as heavy hex nuts,finish hex nuts,square nuts,flange nuts, Nylon Insert Lock Nut, Hex Coupling Nut and so on.

TopKun keep full rang sizes from M3 to M100, from 3/16” to 4” and the Materials could be Carbon Steel, Alloy Steel, Stainless Steel and Brass.

Availiable Grade of nuts could be ASTM A563 Gr. A, C, DH ,ASTM A194 Gr. 2, 2H, 7, 7M,8, 8M, SAE J995 Gr.2, 5,8; CL4, 5, 6, 8, 10, 12.  The finish could be Zinc Plated, yellow zinc plated, Black oxide, H.D.G and so on.

Topkun also can munufacture non-standard nut products according to customers's drawing.