This Aluminum spacer can be widely used in high-temperature, high-pressure, and highly corrosive pressure, valves, sealing parts of cylinder heads, and industries such as car, steel mills, chemical equipment, and engineering machinery.

Specification
Material: Aluminum
Color: Silver
Inside Diameter: 5/16" , 8.2mm
Length: 4mm
Outside Diameter: 12 mm
Compatible Screw Size: 5/16" , M8 Screws Bolts
Size: 8.2 x 12 x 4 mm / 0.323 x 0.472 x 0.157 inch (ID*OD*L)
Packing List: 20 x Round Spacer Aluminum

Advantage
Made of durable Aluminum material, which is hard, good performance, good electrical conductivity, corrosion resistance and can be used for a long time.

Instruction
Easy to use, just need to install on the screw bolts with proper diameter.

NOTE: Please select the appropriate size according to your needs.