Available Sizes & Finishes
65 sizes available
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Applications & Selection Guide
ISO 898-1 property class 8.8 carriage (coach) bolts to DIN 603 / ISO 8677. Smooth mushroom head and square neck — the square pulls into timber or a square hole so the bolt does not spin while the nut is tightened. Quenched and tempered, listed M6–M16.
Specify class 8.8 for heavier timber structures, playground and park equipment, and steel-to-timber joints that outgrow 4.8. The square neck still needs a hole or timber that can take it; in steel plate a square hole or a captured square washer is required. Mate with class 8 nuts. Not a substitute for a hex structural bolt in steel-to-steel work.
Request a quote with M×L sizes, quantities, finish (zinc or HDG outdoors), and delivery country. Matching class 8 nuts and washers can be included.
Technical guides
Bolt grades and sizes: 8.8, 10.9, 12.9, A2 and A4, and metric hex bolt dimensions
What the property classes 4.8, 8.8, 10.9 and 12.9 and stainless A2-70 and A4-70 mean, minimum strength and tensile loads, metric thread pitch and hex head sizes, DIN 933 vs DIN 931, and which nut goes with which bolt.
Read the guide →Screw types compared: socket head, countersunk, set, carriage, tapping and self-drilling screws, with their DIN and ISO standards
How socket head, button head, countersunk, low-head and set screws differ, what DIN 912, ISO 7380, DIN 7991, DIN 916, DIN 603, DIN 965, DIN 7981 and DIN 7504 stand for, and which screw to order for machinery, timber and sheet metal.
Read the guide →Product Information
Material Grade
ISO 898-1 class 8.8
Manufacturing Standard
DIN 603 / ISO 8677
Material Type
Steel
Category
Carriage Bolt
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