A square nut is a four-sided nut. Compared to standard hex nuts, square nuts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening (though also greater resistance to tightening). They are also much less likely to become rounded-off after repeated loosening/tightening cycles. Square nuts are typically mated with square-headed bolts. Square nuts are used along with flat washers in order to avoid damage from its sharp edges and help to increase the strength of the fastener.  

Our MEGATRO provide every type of square nuts with specification as follow:

Size: M5--M36
Grade: 4, 5,6,8,10,12
Materials: carbon and alloy steel& stainless steel
packing: 25kg/carton bulk packing then into pallets or as per client requirements

Production: as per clients' requirements

Origin: Qingdao, Shandong province, CHINA

Payment term: TT; L/C

Lead time: to be discussed by Buyer and Seller