SNSN-M4-10 NBK Hex Socket Head Cap Screws - Nickel - One Screw Made in JapanSNSN M4 10 NBK Hex Socket Head Cap Screws Nickel Made in Japan One Screw Characteristics Pure nickel screws contain Ni 99. 0% or more Excellent corrosion resistance against alkaline liquids such as sodium hydroxide, high purity halogen gas and non oxidizing acids. Main Body: NW2201Ni 99. 0 or more Application: FPD production equipment, semiconductor devices, printed circuit board etching devices, metallic surface treatment equipment and facilities,