Available Sizes & Finishes
65 sizes available
Filters
Diameter (mm)
Thickness (mm)
Applications & Selection Guide
ISO 898-1 class 4.8 carriage (coach) bolts to DIN 603 / ISO 8677. A smooth mushroom (cup) head and a square neck under the head: the square pulls into timber or a square hole and stops the bolt from turning while the nut is tightened. Listed M6–M16.
The standard fastener for timber frames, decking, fencing, and light steel-to-wood connections. Class 4.8 is appropriate for these loads. The head is not wrenchable — tightening is from the nut side. Pair with a class 5 nut and a washer under the nut (not under the head). For heavier timber or steel-to-timber, use class 8.8 carriage bolts.
Add M×L sizes, quantities, coating (often zinc or HDG outdoors), and destination. Matching nuts and washers can go in the same enquiry.
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 4.8
Manufacturing Standard
DIN 603 / ISO 8677
Material Type
Steel
Category
Carriage Bolt
Ready to request pricing?
Add sizes to your quote cart, or paste your full list — Excel, CSV, or plain text.