We will react within 24 hours. Made of high quality steel material., Fixing component, industrial and construction fasteners Fixing component, industrial and construction fasteners. Malco HW8X1ZT Zip-In Screws 1 - 500 T Slot Bolts M8x20mm M8 Thread 20mm T-Slot Drop-In Stud Sliding Screw Bolt Carbon Steel 40 Series 20pcs M8 Sliding Bolt Screws Customer Service:Email us NOW if you have any difficulty with this product or are disappointed with this purchase, for example, defective item is received. Buy MroMax10Pcs 20Pcs M8x20mm T Slot Drop-in Stud Sliding Bolt Screw Carbon Steel Silver Tone. online on at best prices. Fast and free shipping free returns cash on delivery available on eligible purchase Features:Constructed of Carbon Steel, durability and longevity; Chromium Plating for resistance to rust and corrosion. Size:Bolt Length: 20mm/0., 78; Head Size: 18 x 8 x 5., 5mm/0., 7 x 0., 3 x 0., 2(L*W*T);Thread pitch:1., 25mm.