DIN 603, Technical Specification and Weight chart of carriage bolt/cup square bolts as per DIN 603. Carriage bolts are mostly used in wood to wood fastening and general construction of decks, porches, swing sets and other home auxiliary units. DIN 603 is a German standard that specifies the characteristics of carriage bolts. Carriage bolts, also known as coach bolts or round head square neck bolts, are designed with a shallow domed head and a square section underneath to prevent the bolt from turning when tightening the nut. Here are some key points about DIN 603 carriage bolts:

Design: DIN 603 defines the design features of carriage bolts, including the head diameter, head height, shank length, square neck dimensions, and thread length.

Material: Carriage bolts are typically made from materials such as steel, stainless steel, or other alloys, with specified mechanical properties and surface finishes.

Square Neck: The square neck section of a carriage bolt is designed to fit into a square hole in the material being fastened, preventing the bolt from turning while tightening the nut.

Head Type: Carriage bolts have a shallow domed head with a smooth, rounded top, which provides a neat and finished appearance when installed.

Application: Carriage bolts are commonly used in applications where a smooth finish and a secure, non-turning connection are required, such as wood-to-wood or wood-to-metal fastenings.

Interchangeability: DIN 603 is a German standard, and carriage bolts manufactured according to this standard are widely used in Germany and other European countries. While DIN standards are not as globally recognized as ISO standards, DIN 603 carriage bolts are commonly available in the market.