ISO 8677 Carriage bolt also knowed as coach bolt, mushroom head bolt, round head square neck bolt. Those bolts are the most common fasteners and are also the primary products of Boltead.
We manufacture and supply regular carriage bolts, high-strength carriage bolts, and stainless steel carriage bolts.
Name
Carriage Bolts
Materials
Carbon Steel/Stainless Steel
Standards
DIN ISO ANC BSW JIS etc.
Strength level
4.8 8.8 10.9 12.9 A2-70 A4-70 A4-80
Size
M3-M20
Surface finish
ZP\HDG\BLACK\Dacromet etc.
Length
15-500
Samples
Available
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Product Standards
Product Details
FAQ
About Boltead
ISO 8677 Carriage Bolts
ISO 8677 Carriage Bolts
Thread specification
M5
M6
M8
M10
M12
M16
M20
d
P
pitch
0.8
1
1.25
1.5
1.75
2
2.5
b
L≤125
16
18
22
26
30
38
46
125＜L≤200
–
–
28
32
36
44
52
L>200
–
–
–
–
–
57
65
dk
maximum value
13
16
20
24
30
38
46
minimum
11.9
14.9
18.7
22.7
28.7
36.4
44.4
ds
maximum value
5.48
6.48
8.58
10.58
12.7
16.7
20.84
e
5.9
7.2
9.6
12.2
14.7
19.9
24.9
k 1
maximum value
4.1
4.6
5.6
6.6
8.8
12.9
15.9
minimum
2.9
3.4
4.4
5.4
7.2
11.1
14.1
k
maximum value
3.1
3.6
4.8
5.8
6.8
8.9
10.9
minimum
2.5
3
4
5
6
8
10
r 1
maximum value
0.4
0.5
0.8
0.8
1.2
1.2
1.6
s
maximum value
5.48
6.48
8.58
10.58
12.7
16.7
20.84
minimum
4.52
5.52
7.42
9.42
11.3
15.3
19.16
Thousand pieces of steel weight ≈kg
–
–
–
–
–
–
–
thread length b
–
–
–
–
–
–
–
Carriage Bolt Product Photos
There are many types of carriage bolts, we can only show some of them, If you have further requirements, please feel free to contact us anytime!
There are many surface treatments available for these bolts. Below are some of the more common ones showcased in the album：
ISO 8677 Carriage Bolts Carriage Bolts
Boltead’s ISO 8677 black oxide carriage bolt coach bolt
Boltead’s ISO 8677 hot dip galvanized carriage bolt coach bolt
Boltead’s ISO 8677 Stainless steel carriage bolt coach bolt
Boltead’s ISO 8677 yellow zinc plain carriage bolt coach bolt
Boltead’s ISO 8677 galvanizing carriage bolt coach bolt
Carriage Bolt Product Describsion
There are many types of raw materials for carriage bolts, and our main production is based on metal. For example, carbon steel, stainless steel, brass, etc.
Different materials have different advantages and disadvantages. You can refer to your load requirements, usage environment, etc., for ordering.
If you’re unsure about which material, strength, or surface treatment you need for your fastener products, please don’t hesitate to contact us. We’ll be happy to recommend the most suitable options for you!
Here are some common materials for these bolts:
Boltead’s ISO 8677 hot dip galvanized carriage bolt coach bolt
Boltead’s ISO 8677 black oxide carriage bolt coach bolt
Boltead’s ISO 8677 Stainless steel carriage bolt coach bolt
Common carbon steel carriage bolts come in various strength grades and surface treatments.
The strength grade of hex bolts primarily depends on the inherent properties of the raw materials and the manufacturing process.
Common strength grades for carbon steel carriage bolts include: 4.8, 5.8, 6.8, 8.8, 10.9, 12.9.
For stainless steel hex bolts, common strength grades include: A2-70, A4-70, A4-80.
Of course, there are also higher strength products available, although they are less common.
Common surface treatments for these bolts include black oxide, galvanization, hot-dip galvanization, Dacromet, etc.
Carriage Bolt Production Process
Carriage bolt manufacturing processes are typical in fastener production, especially the method of cold heading:
Annealing of raw materials – pickling – drawing – forming – grinding – heat treatment – surface treatment – classification – packaging – shipping
The rough processing flowchart is as follows::
carriage bolt production process
Carriage Bolt Application fields
Carriage bolts, also known as coach bolts or round head square neck bolts, serve various purposes across different industries due to their unique design and characteristics. Here’s a breakdown of their common uses:
Woodworking: These bolts are commonly used in woodworking projects for securing wooden components together, such as attaching legs to tables, framing, or constructing outdoor furniture.
Construction: They find application in construction for fastening wood to metal or wood to wood connections, such as securing wooden beams or rafters to metal brackets or plates.
Fencing and Decking: These bolts are used in fencing and decking projects for attaching rails, posts, and other structural elements, providing a secure and stable connection.
Door and Window Hardware: They are employed in the installation of doors and windows, securing hinges, handles, and other hardware to wooden frames or structures.
Automotive Industry: These bolts are utilized in automotive applications for securing various components, such as attaching seats, brackets, or body panels to vehicle frames or chassis.
Playground Equipment: They find application in assembling playground equipment, securing components such as swings, slides, and climbing frames to wooden structures.
Boat Building: These bolts are used in boat construction for securing wooden planks, frames, and other structural elements, providing strong and reliable connections in marine environments.
Outdoor Structures: They are employed in building outdoor structures such as pergolas, gazebos, and trellises, providing a secure connection between wooden beams, posts, and cross members.
Utility Poles and Structures: These bolts are used in the construction and maintenance of utility poles, securing cross arms, insulators, and other equipment to wooden poles.
Farm and Agricultural Equipment: They find application in agricultural machinery and equipment for securing components such as blades, brackets, or handles to wooden frames or structures.
Lighting Fixtures: These bolts are utilized in outdoor lighting fixtures, securing fixtures to wooden posts or structures, providing a stable and durable mounting solution.
DIY and Home Improvement Projects: They are commonly used in DIY and home improvement projects for various applications, including furniture assembly, shelving installation, and general repairs.
These examples illustrate the versatility and utility of carriage bolts across a wide range of industries and applications, providing secure and reliable fastening solutions for various structures and components.
For more information and knowledge about carriage bolt, please check our blog
FAQ
How long is your delivery lead time?
Boltead’s delivery cycle is generally 7 to 15 days. If you need more product types and models, or need to customize, the delivery cycle will be longer. In this case, please confirm with our sales professional.
Can you provide samples? How to charge for samples?
Boltead can provide samples for your measurement and testing. The samples are free, and you only need to pay the shipping cost.
Do you support OEM product customization?
Of course. Boltead welcomes OEM/ODM orders. We can not only customize products for you, but also customize your product and its packaging.
What are your payment terms?
For payment amounts <= $1000, 100% prepayment is required. For payment amounts >$1000, 30% prepayment is required, with the balance due before shipment.
Can you provide the relevant documents？
Yes, we can provide most documents, such as material certificates, product testing certificates, certificates of origin, and insurance certificates.
Can you guarantee the safe and reliable delivery of products?
Yes, Boltead can ensure the safe and reliable delivery of products to you. Our product packaging will be reinforced beyond the packaging you choose.
What about the shipping cost?
The shipping cost depends on the delivery method you choose. Express delivery is typically the fastest but also the most expensive option. Sea freight is the best solution for large quantities of goods. We can provide an accurate shipping cost only when we have detailed information about the quantity, weight, and method. Please contact us for more information.
About Boltead Fastener
Boltead is committed to providing the world with the most suitable bolts and nuts!
We manufacture and supply fasteners, striving for excellence in every aspect.
Boltead producing fasteners since 2001.All the fasteners we produce have been supplied for export since 2018.
Certificate
Production Process
Product Test
Exhibition/Partner Photos
Our export countries include Russia, South Korea, Britain, France, Germany, Italy, Canada, Mexico,Brazil, Argentina, Chile, Australia, Indonesia, Thailand, Singapore, Saudi Arabia, Syria, Egypt, Tanzania,Kenya and other countries. Our products will be spread all over the world!
Contact us
If you need fasteners, contact us immediately！
Boltead – Bolts & Nuts
Add : South of Ximingyang Village, Linmingguan Town, Yongnian District, Handan City, Hebei Province,CHINA
