Minimum order : 280 items
Customization as per requiments
| Size | M6 to M72 (Metric) |
| Type | Bolt, Nut, Screw, Washer, Rivet, Threaded Rod, Studs, Coated, Nails, Custom Fasteners |
| Standard | Din, Iso, Jis, Gb, Is, Bs, Astm |
| Length | 10 mm to 1000 mm |
| Material | Stainless Steel, Monel, Inconel, Incoloy, Hastelloy, Nickel, Silicon Bronze, Phosphor Bronze |
Delta Fitt Inc is a leading carriage bolts manufacturer specializing in smooth headed bolts perfect for Wood-to-metal fastening and structural use. These bolts boast a domed head and square neck that effectively secure timber or metal, preventing any turning while tightening. Available in carbon steel, stainless steel and alloy steel options, these bolts are the ideal choice for decking, fencing, scaffolding, and machinery bases where a seamless and snag free head is desired.
Our B2B clients in construction and industrial sectors can trust our supply of carriage bolts that meet ASTM A307, DIN 603 and ISO 8677 standards. These bolts are subjected to testing for head pull through resistance, thread accuracy and corrosion protection. Additionally, we provide the option for customization in terms of diameter, shank length, thread length and surface finish (galvanized, zinc plated or stainless passivation). With our efficient production and logistics processes, we guarantee prompt delivery to our clients in India as well as in export markets such as construction, agriculture and OEM industries.
Manufactured from SS 304 or SS 316, these bolts offer superior rust resistance and strength. Perfect for marine, food processing, and architectural applications, the stainless finish maintains aesthetics and hygiene. Their self locking square neck ensures easy installation and a flush finish in wooden walkways, playground equipment, and stainless steel structures.
These carriage bolts are hot dip galvanized to provide exceptional corrosion resistance in outdoor and marine environments. The square neck firmly locks into wood or metal, preventing bolt spin, while the domed head offers a smooth, snag free finish—ideal for decking, pergolas, and exterior structural assemblies where weather protection is critical.
What materials are commonly used in manufacturing Carriage Bolts?
Carriage Bolts are typically manufactured from stainless steel (SS 304, SS 316), carbon steel, alloy steel, and hot-dip galvanized iron. These materials provide corrosion resistance, tensile strength, and long service life. Stainless steel is preferred for marine and outdoor applications due to its excellent rust resistance. Versions made of carbon steel are frequently employed for general structural applications, and all of them meet ASTM A307 or DIN 603 criteria for mechanical and dimensional consistency.
What standards do Carriage Bolts comply with?
Carriage Bolts are produced to meet global standards such as ASTM A307, DIN 603, and IS 1363. These standards define bolt strength grades, thread tolerances, and material composition. Compliance ensures they can be safely used in load-bearing wooden structures, metal assemblies, and critical construction frameworks.
How durable are Carriage Bolts in outdoor or industrial use?
Carriage Bolts are designed for long-lasting performance even in demanding environments. Stainless steel and galvanized versions resist corrosion and can withstand temperature variations, humidity, and mechanical stress. Their square neck design prevents rotation, offering a firm lock when embedded in timber or steel. Whether installed in deck construction, bridges, agricultural machinery, or railways, these bolts maintain their structural integrity under frequent load cycles.
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