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A carriage bolt, coach bolt or round head square neck bolt is a form of bolt.It is distinguished from otherbolts by its head: the shank of the bolt is circular for most of its length, as usual, but the portion immediately beneath the head is formed into a square section. This makes the bolt self-locking when placed through a square hole, or a round hole in most wood. This allows the fastener to be installed with only a single tool, a spanner or wrench, working from one side. The head of a carriage bolt is usually a shallow dome. The squared section is of the same size as the diameter of the bolt shank, with a plain unthreaded shank.
| Standard: | DIN,ASTM/ANSI JIS EN ISO,AS,GB | |
| Material | Stainless Steel: SS201, SS303, SS304, SS316,SS316L,SS904L,F593 | |
| Steel Grade: DIN: Gr.4.6,4.8,5.6,5.8,8.8,10.9,12.9; SAE: Gr.2,5,8; ASTM: 307A,307B,A325,A394,A490,A449, | ||
| Finishing | Zinc(Yellow,White,Blue,Black),Hop Dip Galvanized(HDG),Black Oxide, | |
| Production | M2-M24:Cold Froging,M24-M100 Hot Forging, | |
| Customized Products | Busy season:15-30days,Slack seaon:10-15days | |
| Stock Products | Steel:4.8Grade DIN6923,8.8Grade 10.9Grade of GB5783 and GB5782 | |
| Free Samples for standard fastener | ||
Silicon Bronze Square Neck Carriage Bolts
