Carriage Bolts

National Bolt & Nut Corp. offers carriage bolts in the following configurations: ribbed neck, metric, full thread, and standard. Ribbed neck carriage bolts are available in ANSI B18.5 thread sizes ranging from 1/4 to 20, they feature coarse thread styles, zinc/clear/plain finishes, and Grade 5 materials. These bolts are ideally used for aluminum, thin gage steel, or wood applications.

Marksmen Manufacturing Corp. offers zinc plated HDG-PKG (with nuts) and zinc plated carriage bolts. These bolts are constructed from zinc materials, and they range in size from 1/4" x 3/4" to 3/4" x 18".

Fastenal manufactures steel, silicon bronze, stainless steel, low carb, and brass carriage bolts. Bolts are available in lengths ranging from 1/2" to 26", diameters ranging from 1/4" to 3/4", and a wide range of grades, including: 2, 5, 8, 8.8, 18-8, 316, A, A2, A4, etc.

Grainger Industrial Supply offers standard and bulk carriage bolts in a wide range of materials, including: carbon steel, stainless steel, standard steel, 18-8 stainless steel, medium carbon steel, and low carbon steel. These bolts are available in lengths ranging from 1" to 18", thread sizes ranging from 3/8 to 20, and the following finishes: chrome, plain, hot dipped galvanized, and zinc. Bolts come in A, RC 24-34, 2, 5, or 1 grades.

Blue Ribbon Fastener Co. offers carriage bolts in the following configurations: round head, low carbon square neck, Grade 5 square neck, Grade 8 square neck, flat head square neck, low carbon short neck, low carbon ribbed neck, and low carbon square neck. These bolts are constructed from 18-8 stainless steel, steel zinc, zinc yellow, and hot dipped galvanized materials.

Fastener Technology, Inc. offers round head square neck bolts. Bolts feature fillet radii ranging from 0.031 to 0.062, corner radii on square up to 0.094, and nominal sizes ranging from No. 10 to 1. They have body diameters ranging from 0.159 to 1.022, head diameters ranging from 0.436 to 2.094, and head heights of up to 0.531.

Shamrock Industrial Fasteners offers square neck carriage bolts. These bolts have basic diameters ranging from 1/4 to 10, body diameters from 0.1990 to 0.7680, head diameters ranging from 0.436 to 1.594, and head heights ranging from 0.114 to 0.406.

Glaser & Associates, Inc. offers SAE J429 Grade 5 and ASTM A307 Grade A round head carriage bolts in a variety of finishes. SAE J429 Grade 5 carriage bolts feature national coarse threads, plain/zinc blue plated finishing, and size ranges from 1/4-20 x 1/2 to 3/8-16 x 5. They have industrial, commercial, and residential applications. ASTM A307 Grade A square neck carriage bolts feature hot dip galvanized, plain, and zinc blue finishes, and they range in size from 3/16-24 x 1/2 to 1/4-20 x 6. They are ideally used for anchoring, residential bolting, commercial, and industrial applications.

BoltDepot.com manufactures carriage bolts in silicon bronze, hot dipped galvanized steel, chrome plated grade 5 steel, zinc plated grade 5 steel, zinc plated steel, and 18-8 stainless steel materials. Bolts are typically used in automotive applications that require high strength/corrosion resistance. Model #886 hot dipped galvanized carriage bolts have coarse thread densities, square neck styles, and right handed thread directions. These bolts are available with 18 threads, 4-1/2" lengths, 5/16" diameters, and 0.187" square depths.

Reid Supply Company manufactures carriage bolts in thread sizes ranging from 1/4 to 20 and lengths ranging from 1" to 5". Model ROC-2131-675 carriage bolts feature coarse threads in sizes ranging from 7/16 to 14, lengths of up to 1-3/4", and they come in 50 count quantity packages. These bolts are constructed from steel materials and are zinc chromate finished.

Manasquan Premium Fasteners offers stainless steel carriage bolts in 18-8 and 316 stainless steel materials. These bolts are available in diameters ranging from 1/4" to 3/4", lengths ranging from 1" to 18", and they are approved for use in ACQ lumber. 316 stainless steel carriage bolts are rust-proof and and corrosion resistant due to their molybdenum content (a low carbon element), making them ideal for seaside/salt water applications.

Portland Bolt & Manufacturing Co. offers carriage bolts for wood connection applications. These bolts range in diameter from 3/8 to 1-1/4", they have lengths up to 18", and black or hot-dip galvanized finishing options. Bolts are compliant with ASTM, A307, and ASME specifications, and they feature head diameters ranging from 0.782 to 2.850 and head heights ranging from 0.188 to 0.531.

Auto Bolt manufactures custom carriage bolts in various grades of stainless steel, alloy steel, and carbon steel. These bolts are available with diameters ranging from 1/2" to 60", lengths ranging from 1/2" to 60", and the following coating options: organic, cadmium, black oxide, oil & phos, zinc yellow, and zinc. Bolts are certified to the DIN, ISO, SAE, ANSI, ASME, and ASTM specifications.

WholesaleBolts.com manufactures carriage bolts for outdoor, marine, general use, high strength, and wood construction applications. These bolts are available in zinc or galvanized coatings, and they are constructed from steel grade A or steel grade 5 materials. Bolts are available in diameters ranging from 1/4 to 20 and lengths up to 20".

Bolt Products, Inc. offers zinc-plated, steel grade 5, stainless steel 18-8, silicone bronze, and hot dipped galvanized carriage bolts. These bolts are available in a wide range of types and diameters, and they are commonly used for following applications: exterior use in coastal areas, wood boat building, exterior marine environments, high-strength automotive environments, and rust-prone environments.