Carriage Bolts (Square Neck)
Carriage bolts: round head square neck (GB/T 12), countersunk square neck (GB/T 10) and square head (GB/T 8). Square neck prevents rotation in slots and timber. Filter by head form, diameter, length and finish.
Key Parameters
Standard Basis
GB/T 12 / GB/T 10 / GB/T 8
Common equivalents are listed below; confirm dimensions and drawing details before substitution.
Spec Range
M6–M20 · 38 sizes / 70 SKUs
Carbon Steel; Hot-Dip Galvanized
Grades
—
Confirm grade together with mating nuts, washers and certificate requirements.
What to include
Quoted by full spec
Prices differ by size, material, grade and finish, please inquire with full specifications. For non-standard specs, a drawing or site photo is welcome.
Standard Equivalents
Cross-referenced equivalents, order to the primary standard
| Standard | Fit | Remark |
|---|---|---|
| DIN DIN 603 | Commercial equivalent | Common commercial equivalent; confirm head and neck dimensions on order |
| ISO ISO 8677 | Commercial equivalent | Common commercial equivalent; confirm head and neck dimensions on order |
Diameter
Length
Material
Carriage bolts: round head square neck (GB/T 12), countersunk square neck (GB/T 10) and square head (GB/T 8). Square neck prevents rotation in slots and timber. Filter by head form, diameter, length and finish.
Spec Range
M6–M20 · 38 sizes
SKU Matrix
70 SKUs| SKU | Size (Dia × Len) | Material / Finish | Threading | Pitch | Unit Wt (g) | Action | |
|---|---|---|---|---|---|---|---|
 | CB-001188 | M6×20 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 8 Estimated | Request a Quote |
 | CB-001189 | M6×25 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 9 Estimated | Request a Quote |
 | CB-001190 | M6×30 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 10 Estimated | Request a Quote |
 | CB-001191 | M6×40 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 12 Estimated | Request a Quote |
 | CB-001192 | M6×50 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 14 Estimated | Request a Quote |
 | CB-001193 | M6×60 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 17 Estimated | Request a Quote |
 | CB-001194 | M8×20 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 15 Estimated | Request a Quote |
 | CB-001195 | M8×25 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 17 Estimated | Request a Quote |
 | CB-001196 | M8×30 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 19 Estimated | Request a Quote |
 | CB-001197 | M8×40 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 23 Estimated | Request a Quote |
 | CB-001198 | M8×50 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 27 Estimated | Request a Quote |
 | CB-001199 | M8×60 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 30 Estimated | Request a Quote |
 | CB-001200 | M10×20 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 25 Estimated | Request a Quote |
 | CB-001201 | M10×25 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 28 Estimated | Request a Quote |
 | CB-001202 | M10×30 | Carbon Steel· —· Hot-Dip Galvanized3 material/finish options | Partially Threaded | — | 31 Estimated | Request a Quote |
 | CB-001203 | M10×40 | Carbon Steel· —· Hot-Dip Galvanized3 material/finish options | Partially Threaded | — | 37 Estimated | Request a Quote |
 | CB-001204 | M10×50 | Carbon Steel· —· Hot-Dip Galvanized3 material/finish options | Partially Threaded | — | 43 Estimated | Request a Quote |
 | CB-001205 | M10×60 | Carbon Steel· —· Hot-Dip Galvanized3 material/finish options | Partially Threaded | — | 49 Estimated | Request a Quote |
 | CB-001242 | M10×80 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 67 Estimated | Request a Quote |
 | CB-001206 | M12×20 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 44 Estimated | Request a Quote |
 | CB-001207 | M12×25 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 48 Estimated | Request a Quote |
 | CB-001208 | M12×30 | Carbon Steel· —· Hot-Dip Galvanized3 material/finish options | Partially Threaded | — | 51 Estimated | Request a Quote |
 | CB-001209 | M12×40 | Carbon Steel· —· Hot-Dip Galvanized3 material/finish options | Partially Threaded | — | 60 Estimated | Request a Quote |
 | CB-001210 | M12×50 | Carbon Steel· —· Hot-Dip Galvanized3 material/finish options | Partially Threaded | — | 69 Estimated | Request a Quote |
 | CB-001211 | M12×60 | Carbon Steel· —· Hot-Dip Galvanized3 material/finish options | Partially Threaded | — | 78 Estimated | Request a Quote |
 | CB-001247 | M12×80 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 97 Estimated | Request a Quote |
 | CB-001212 | M16×20 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 90 Estimated | Request a Quote |
 | CB-001213 | M16×25 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 97 Estimated | Request a Quote |
 | CB-001214 | M16×30 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 100 Estimated | Request a Quote |
 | CB-001215 | M16×40 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 120 Estimated | Request a Quote |
 | CB-001216 | M16×50 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 130 Estimated | Request a Quote |
 | CB-001217 | M16×60 | Carbon Steel· —· Hot-Dip Galvanized2 material/finish options | Partially Threaded | — | 150 Estimated | Request a Quote |
 | CB-001252 | M16×80 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 190 Estimated | Request a Quote |
 | CB-001253 | M20×30 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 200 Estimated | Request a Quote |
 | CB-001254 | M20×40 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 230 Estimated | Request a Quote |
 | CB-001255 | M20×50 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 250 Estimated | Request a Quote |
 | CB-001256 | M20×60 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 270 Estimated | Request a Quote |
 | CB-001257 | M20×80 | Carbon Steel· —· Hot-Dip Galvanized | Partially Threaded | — | 320 Estimated | Request a Quote |