High strength blue PTFE ASTM F436 washer  

Bolt, Full thread stud, Stud, Stud Bolt, Threaded Rod       ASTM F436 Classification of American Steel Structural Gaskets, Generally Processed with 45 # Steel Plate       The design concept of ASTMF436 structural washers is to use A325 to construct screws, studs, and nuts, which are generally used in external engineering buildings.       F436 flat pads are generally used in building structural design together with A325 and A490 bolts. The name F436 also represents that this type of flat pad can be used in a variety of applications, bringing a hardness standard of high strength and long-term durability throughout. All workers who need to meet the requirements of ASTM size specifications for mechanical equipment, chemical industry, or specification dimensions need to choose F436 flat washers, as it is a strongly recommended solution, except for low-carbon steel bolts.      T…