WeLCOME TO RAVINA INDUSTRIES MANUFACTURER & eXPORTER of linkage parts
Carriage Bolt Manufacturer & Exporter
Carriage Bolt Manufacturer & Exporter – Ravina Industries
Ravina Industries is a trusted Carriage Bolt Manufacturer and Exporter in India, supplying high-quality round head square neck bolts for industrial, construction, agricultural, and automotive applications. Manufactured with precision forging and accurate square neck dimensions, our carriage bolts ensure secure locking, anti-rotation performance, and long-term durability.
We manufacture carriage bolts as per DIN, ISO, ASTM, and IS standards, offering standard and custom sizes for OEMs and export markets worldwide.
What is a Carriage Bolt?
A carriage bolt (also known as a coach bolt or round head square neck bolt) features:
A smooth, domed round head
A square neck beneath the head to prevent rotation
A fully or partially threaded shank
Carriage bolts are widely used where a flush finish and tamper-resistant fastening is required.
Carriage Bolt Standards Manufactured
DIN & ISO Standards
DIN 603 / ISO 8677 – Metric Carriage Bolts
Used in structural steel, machinery, and industrial assemblies
ASTM / ASME Standards
ASME B18.5 – Inch Carriage Bolts
ASTM A307 Grade A – Structural & general applications
ASTM F593 – Stainless steel carriage bolts
IS Standards
IS 1365 / IS 1367 – Indian standard carriage bolts
Types of Carriage Bolts Manufactured
Standard Carriage Bolts
Short Neck Carriage Bolts
Long Neck Carriage Bolts
Fully Threaded Carriage Bolts
Partially Threaded Carriage Bolts
Heavy Duty Carriage Bolts
Custom Carriage Bolts as per Drawing
Size Range Available
Metric Sizes: M5 to M30
Inch Sizes: 1/4" to 1"
Length: 10 mm to 300 mm (Custom lengths available)
Material & Grades Offered
Carbon Steel – Grade 4.6, 5.6, 8.8
Alloy Steel – Heat Treated
Stainless Steel – SS 202, SS 304, SS 316
ASTM Grades – A307, F593
Surface Finish Options
Black / Self Finish
Zinc Plated (White / Yellow)
Hot Dip Galvanized (HDG)
Phosphate Coated
PTFE / Xylan Coated
