Carriage bolts (round head with square neck) are commonly used in wood connections. The square neck under the round head will seat into the hole in the wood to prevent the head from turning. Because they are used with wood, carriage bolts are rarely high strength and virtually always supplied in a standard ASTM A307 specification.
Standard: ANSI/ASME B18.5/ DIN603
GRADE: A307,GR A,A2-304,A4-316
Material: carbon steel, alloy steel,stainless steel.
Size:from 1/4” to 1”, from 6mm to 24mm.
Surface finish:zinc plated, plain, black oxide, HDG
Packing: cartons with plywood pallet
Supply ability: 200tons per month
Assembly: normally with hex flange nut, with or without serration.
HAIYAN is a trusted carriage bolt supplier for construction, OEM, and many other industries. Carriage bolts most commonly have a smooth, domed head with a square section underneath that pulls into the material to prevent spinning during installation. This feature allows for the bolt to be self-locking when installed through a square hole in a metal strap, or a round hole in most woods. It can be installed with a spanner or wrench. Shop for a large selection of Metric and Inch carbon or stainless steel carriage bolts in sizes No. 10, 1/2″, 1/4″, 3/16″, 3/4″, 3/8″, 5/16″, 5/8″ 7/16″, 1 1/2″.
Depending on your application, we supply a wide array of materials and grades, such as hot dipped galvanized carriage bolts commonly used for outdoor furniture because of the thicker protective coating, Grade-5 and Grade-8 carriage bolts for greater load carrying capacity, or 316 stainless steel carriage bolts for greater corrosion resistance. When installing sheet metal, choose a round head, short neck carriage bolt as the standard size neck may create an obstruction. And, for soft, ductile metals, wood and plastics, the round head, ribbed neck carriage bolt may be your best option. As a carriage bolt supplier, HAIYAN is always here to help, so if you don’t see the exact product or size you need, please contact us for assistance.