Welded Chain Grades Chain Size Working Load Limit (lbs)
Nominal inside link dim (inches) Weight per 100 ft. (lbs)
Inches Decimal Length Width
welded chain grades CM
GRADE 30 PROOF
COIL CHAIN
3/16 .218 800 .95 .40 38
1/4 .276 1,300 1.00 .47 66
5/16 .327 1,900 1.10 .50 98
3/8 .390 2,650 1.23 .62 144
7/16 .468 3,700 1.37 .75 210
1/2 .531 4,500 1.50 .81 278
5/8 .656 6,900 1.87 1.00 422
3/4 .787 10,600 2.12 1.12 628
1 1.031 17,900 2.75 1.50 1,069
welded chain grades CM
GRADE 43
HIGH TEST
CHAIN
1/4 .281 2,600 1.00 .47 71
5/16 .327 3,900 1.10 .50 98
3/8 .390 5,400 1.23 .62 144
7/16 .468 7,200 1.37 .75 210
1/2 .531 9,200 1.50 .81 278
5/8 .656 13,000 1.87 1.00 422
3/4 .781 20,200 2.12 1.12 606
7/8 .875 24,500 2.25 1.14 776
1 1.000 34,100 2.75 1.50 1,050
welded chain grades CM
GRADE 70
TRANSPORT
(BINDING)
CHAIN
1/4 .281 3,150 .84 .47 74
5/16 .327 4,700 .98 .46 100
3/8 .406 6,600 1.14 .54 156
7/16 .468 8,750 1.33 .62 204
1/2 .531 11,300 1.43 .72 259

Dimensions and weights are approximate and subject to variations.

Welded Chain Grades Chain Size Working Load Limit (lbs)
Nominal inside link dim (inches) Weight lbs./ft. Feet Per Drum
Inches Decimal Length Width
welded chain grades CM
GRADE 100
HERC-ALLOY
1000 CHAIN
7/32 5.5 2,700 0.68 0.31 0.44 800
9/32 7.0 4,300 0.88 0.40 0.73 500
3/8 10.0 8,800 1.25 0.57 1.44 500
1/2 13.0 15,000 1.56 0.73 2.46 300
5/8 16.0 22,600 1.92 0.86 3.70 200
3/4 20.0 35,300 2.40 1.07 5.77 100

CM Grade 30 Proof Coil Chain

Electrically welded from low carbon steel, CM grade 30 is a durable, economical utility chain for applications which do not require a high strength to weight ratio. It has a wide range of applications throughout industry and agriculture, including logging, guard rails, towing, tailgates, and securing loads.

Specification name: Proof coil.

CM Grade 43 High Test Chain

A higher strength carbon steel chain provides an increased strength to weight ratio. Industrial applications include lumbering, construction, binding and load securement assemblies.

Specification name: High test.

CM Grade 70 Binding Chain

Load ratings for CM grade 70 chain average 20% higher than CM grade 43 chain, so a smaller size chain can be used for many jobs. Advantages include less weight, easier handling and more convenient storage. Higher strength makes CM grade 70 ideal for truckers, loggers and highway crews; for secure load binding and tie-downs; for towing, hauling and lashing, and as trawling chain. Additional uses include oil rigs and a variety of other OEM applications.

Specification name: Binding/transport.

CM Grade 100 Herc-Alloy 1000 Chain

CM Herc-Alloy® products are made of superior triple alloy steel that provides the best strength-to-weight performance in the industry. Herc-Alloy® is now one of the most recognized and trusted brands in the rigging industry and is only offered by Columbus McKinnon.

Specification name: Alloy.