Grade 5 Carriage Bolts

Grade 5 Carriage Bolts

Grade 5 Carriage Bolts

High-strength carriage bolts made from 1035 heat-treated steel. Fully threaded to the shoulder and zinc plated for corrosion resistance. Available in standard and rib neck styles for secure fastening applications.

Product Details

Material: 1035 Steel, heat treated
Standard: ANSI B18.5
Marking: 3 radial lines (Grade 5)
Finish: Zinc plated
Thread: Coarse Thread (USS)
Additional: Fully threaded to shoulder

Rib Neck Variant

  • Ribbed neck spline prevents turning
  • Round dome head avoids material catching
  • Flat under-head bearing surface for clamping
  • Also zinc plated (Grade 5)

Part Numbers & Size Chart

Grade 5 Carriage Bolts (USS Coarse Thread)
Diameter Length Part Number
1/4-20 3/4″ 32-5406
1″ 32-5408
1-1/4″ 32-5410
1-1/2″ 32-5412
1-3/4″ 32-5414
2″ 32-5416
2-1/4″ 32-5418
2-1/2″ 32-5420
2-3/4″ 32-5422
3″ 32-5424
3-1/2″ 32-5426
4″ 32-5428
4-1/2″ 32-5430
5″ 32-5432

 

Grade 5 Rib Neck Carriage Bolts (USS Coarse Thread, Without Nuts)
Diameter Length Part Number Rib Length
1/4-20 1″ 32-6408 .407″
1-1/4″ 32-6410 .594″
1-1/2″ 32-6412 .594″
2″ 32-6416 .594″
3/8-16 1″ 32-6608 .407″
1-1/4″ 32-6610 .594″
1-1/2″ 32-6612 .594″
2″ 32-6616 .594″
2-1/2″ 32-6620 .594″
5/16-18 1-1/2″ 32-6512 .594″
2″ 32-6516 .594″
Shipping & Stocking Made Simple

At GNS Industrial Supply, we don’t just deliver products—we deliver peace of mind. Unlike traditional suppliers who ship and leave the rest to you, we take a hands-on approach to your inventory management. Our team visits your location, audits your existing stock, identifies what you need, and handles the reordering process for you. We then deliver directly to your facility and restock your supply room according to your preferred system—ensuring your operation runs smoothly without overstock or downtime. It’s a smarter, more personalized way to manage industrial supplies—built for teams who don’t have time to run out of what matters.