It can still play a role in the actual connection process. After-sales service: We have a strong after-sales team. The stainless steel square neck screws we sell have very good anti-rust effects. CARRIAGE BOLT 5/16-18 X 1 1/2 - S.H.Chooi Fasteners 5/8"-11 x 16" Conquest Carriage Bolt - 18-8 Stainless Steel – Fasteners Plus During the processing of the square groove, they can start to prevent getting stuck in the groove, and the carriage bolts can move parallel to the groove. Since the head of the slider is round, there are no useful tools such as cross recesses or hexagon sockets. Material: The carriage bolts are made of 18-8 (SUS304) stainless steel, which is very difficult to be used indoors and outdoors. Product: Stainless Steel Carriage Bolt Material: (304) 18-8 stainless steel Specification and quantity: 5/16-18*1-3/4 (25 pieces) 5/16-18*3 (25 pieces) 5/16 -18*2-3/4 (25 pieces) ))) 5/16-18*1-1/4 (25 pieces) 5/16-18*2-1/2 (25 pieces) 5 /16-18*2 (25 pieces) 5 / 16 -18*1(25 pieces) 5/16-18*2-1/4(25 pieces) Product introduction: The carriage bolt is immersed in the groove. How to use: The stainless steel carriage bolts are used in the groove. Hillman Stainless Steel Carriage Bolt (5/16-18 Coarse Thread x 1-1/2 Length) 3502 - The Home Depot The stainless steel carriage bolts can move parallel in the groove. 5/16-18 Carriage Bolts 1-1/4 Inch 304 Stainless Highcool 20 Sets Of 5/16-18 X 1-1/4" Carriage Bolts, Screws, Hex Nuts Flat Washers 304 Stainless Steel 18 8 Round Square Neck Complete Thread Coverage 5/16-18 Carriage Bolts 25 Pack