PRODUCT
Material: Carbon Steel
Finish: Blue Galvanized
Grade:4.8
Standard: DIN603
MOQ:1000PCS
Samples: Free
Certification: ISO9001, SGS
Place of Origin: Zhejiang China
Product Details
Carriage Bolts are often used for connecting wood to wood, wood to metal and metal to metal
At the Goshen hardware , we provide you with several high quality Carriage Bolts that are made from premium quality materials and different grades of stainless steel to ensure that these will last for long time.
Typically, carriage bolt sizes range from #10 to 3/4" or M5 to M20 in diameter while lengths span from about 1/2" to 20"—only larger sizes are available in long lengths. Measure length from under the head to the threaded end of the bolt. And it’s often using standard as beloW: DIN607， DIN603 ，ISO 8677，JIS B 1171，ASME/ANSI B 18.5.2.3M，ASME/ANSI B 18.5 ect.If u have drawing of carriage bolt, pls send it to us , we can according your requirement to production. Welcome your inquiry.
| Gr4.8 Chemical Composition(%) | |||||
| Grade | C | Mn | Si | S≤ | P≤ |
| 0.045 | 0.27 | 0.06 | 0.027 | 0.02 | |
| Mechanic Periormance | |
| RM（mpa) | A(%) |
| 345 | 33 |
| DIN603 | |||||
| Screw Thread d | Pitch P | k | s | ||
| min | max | min | max | ||
| M5 | 0.8 | 2.7 | 3.3 | 4.52 | 5.48 |
| M6 | 1 | 3.12 | 3.88 | 5.52 | 6.48 |
| M8 | 1.25 | 4.12 | 4.88 | 7.42 | 8.58 |
| M10 | 1.5 | 4.62 | 5.38 | 9.42 | 10.58 |
| M12 | 1.75 | 6.05 | 6.95 | 11.3 | 12.7 |
| M16 | 2 | 8.05 | 8.95 | 15.3 | 16.7 |
| M20 | 2.5 | 9.95 | 11.05 | 19.16 | 20.84 |
– Conforms to DIN 603 (round head, square neck, mushroom-head carriage bolt)
– High-strength carbon steel, 4.8 / 6.8 / 8.8 grades available
– Full chemical & physical traceability per EN 10204 3.1 on request
– Hot-dip galvanized (HDG) 45–60 µm zinc coating
– Post-dip blue chromate passivation for extra corrosion resistance and a distinctive “blue” colour
– Smooth, low-profile mushroom head distributes load evenly
– Square neck under head prevents rotation when nut is tightened, eliminating the need for a wrench on the bolt side
– Metric coarse (M5–M20 as standard)
– Partial thread length = 2 × d + 6 mm (DIN 603 pattern)
– Other threads (fine pitch, UNC, BSW) available on request
– Minimum 1 000 h neutral salt-spray (NSS) with blue passivation & top-seal oil
– Suitable for C3–C4 atmospheric environments (coastal, industrial)
– Timber-to-timber & timber-to-steel connections in outdoor structures
– Decking, fencing, playground equipment, pergolas, solar racking
– Any assembly where visual colour coding or enhanced corrosion protection is required
