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Chains and binders for flatbed, step deck and lowboy loads. We stock Grade 70 transport chain in 5/16″, 3/8″ and 1/2″ with clevis grab hooks on both ends, plus forged ratchet, lever and indirect load binders rated for 5/16″–3/8″ and 3/8″–1/2″ chain. Every chain and binder carries a working load limit, so you can match chain to binder and meet FMCSA securement rules without guessing.
Grade 70 Transport Chain: Sizes and Working Load Limits
Grade 70 is the standard transport chain for cargo securement. It is heat-treated carbon steel with a yellow chromate finish. Shop all sizes on our Grade 70 transport chain page.
| Chain size | Lengths in stock | Working load limit (Grade 70) | Typical use |
|---|---|---|---|
| 5/16″ | 16 ft, 20 ft | 4,700 lb | General freight, lumber, light equipment, hotshot loads |
| 3/8″ | 16 ft, 20 ft | 6,600 lb | Machinery, steel, most flatbed equipment |
| 1/2″ | 10 ft, 20 ft | 11,300 lb | Heavy equipment on lowboy and RGN trailers |
How to Match a Binder to Your Chain
A chain and its binder work as one assembly, and the assembly is only as strong as its weakest part. Use this table to pair them.
| Chain | Binder | Binder WLL | Assembly WLL |
|---|---|---|---|
| 5/16″ Grade 70 (4,700 lb) | 5/16″–3/8″ ratchet, lever or indirect binder | 5,400 lb | 4,700 lb |
| 3/8″ Grade 70 (6,600 lb) | 3/8″–1/2″ ratchet binder | 9,200 lb | 6,600 lb |
| 3/8″ Grade 70 (6,600 lb) | 5/16″–3/8″ binder | 5,400 lb | 5,400 lb (binder limits) |
| 1/2″ Grade 70 (11,300 lb) | 3/8″–1/2″ ratchet binder | 9,200 lb | 9,200 lb (binder limits) |
Ratchet, Lever or Indirect Binder?
- Ratchet binder: tightens in small increments and stores little energy in the handle. The safer, more controlled choice for most drivers.
- Lever binder: the fastest take-up in a single pull. The handle can snap back if it slips, so use it with care.
- Indirect load chain binder: rated 5,400 lb for 5/16″–3/8″ chain.
See every model with its rating on our load binders and chain binders page.
How Many Chains and Binders Do You Need?
FMCSA rules apply two checks at once. First, the combined working load limit of your tie-downs must be at least 50 percent of the cargo weight: a 20,000 lb load needs at least 10,000 lb of aggregate WLL. Second, the number of tie-downs depends on length: two for the first 10 feet and one more for each additional 10 feet or part of it. Vehicles and machinery of 10,000 lb or more need at least four tie-downs. Read the full breakdown in our FMCSA cargo securement rules guide.
Why Flatbedders Buy Chains and Binders From Us
- Grade 70 transport chain with clevis grab hooks and a yellow chromate finish
- Working load limits listed for every chain size and every binder
- Order before noon and your chains and binders usually ship the same day
- Real truckers answer the phone and help you size your securement
Frequently Asked Questions About Chains and Binders
Short, specific answers for flatbed and heavy-haul drivers.
- What size chain and binder do I need for a flatbed?
For general freight, lumber and light equipment most flatbedders run 5/16 inch Grade 70 chain with a 5/16–3/8 inch binder. Machinery and steel usually call for 3/8 inch chain, and heavy equipment on a lowboy or RGN calls for 1/2 inch. Pick the chain for the load, then pick the binder rated for that chain size. - What is the working load limit of 5/16 Grade 70 chain?
5/16 inch Grade 70 transport chain has a working load limit of 4,700 lb. 3/8 inch Grade 70 is 6,600 lb and 1/2 inch Grade 70 is 11,300 lb. Grade 70 is identified by its yellow chromate finish and the grade marking on the links. - Can I use a 5/16–3/8 inch binder on 3/8 inch chain?
Yes, the binder fits 3/8 inch chain, but the assembly is only as strong as its weakest part. Our 5/16–3/8 inch binders are rated 5,400 lb, so a 3/8 inch Grade 70 chain (6,600 lb) with that binder counts as a 5,400 lb assembly. To use the full chain rating, pair 3/8 inch chain with a 3/8–1/2 inch binder. - Is a ratchet binder or a lever binder safer?
A ratchet binder is generally the safer choice. It tightens in small increments and stores very little energy in the handle, so release is controlled. A lever binder takes up slack faster in one pull, but the handle can snap back if it slips, so it needs more care. - How many chains and binders do I need?
Two rules apply together. The combined working load limit of your tie-downs must be at least 50 percent of the cargo weight, and you need a minimum number of tie-downs based on length: two for the first 10 feet plus one for each additional 10 feet. Vehicles and machinery of 10,000 lb or more need at least four tie-downs. - How do I identify Grade 70 chain?
Grade 70 transport chain has a gold or yellow chromate finish and is marked with its grade on the links. Our Grade 70 chain comes with clevis grab hooks on both ends. - Do you sell chain and binder kits?
Yes. Our chain and binder kit pairs 20 ft Grade 70 chain with 5/16″–3/8″ ratchet binders: buy one chain and one binder per tie-down. For 3/8″ or 1/2″ chain, use the pairing table on this page.
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