carriage bolts grade 5 Industrial carriage bolts come with a square neck under a round head. They come fully threaded under 6” and they are excellent to use for wood to wood connections. At KD Fasteners, Inc.®, we supply a full range of industrial & custom carriage bolts.

We supply the following types of Carriage Bolts:

Standard carriage bolt (square neck, round head): Grade 2, 5, 8 (grade 8 carriage bolts are also known as shaker screen bolts), stainless steel (18-8 and 316 series), brass, silicon bronze, aluminum, exotic materials, and titanium
Ribbed neck carriage bolts (ribs under the head) in 18-8, grade 2 and grade 5.
Short neck, round head (the square neck is shorter than standard) in grade 2 steel.
Square neck, flat head (instead of domed head, the head is flat) we have them off the shelf in low carbon steel.

We also supply carriage bolts in metric per DIN 603. We can make any style of industrial carriage bolt per print with the material and plating that you need. Some of the industries we supply are automotive, chemical, marine, military, and many more.

Partner with KD Fasteners as your industrial carriage bolts supplier and contact us today!