Nominal Chain Size

Material Diameter

Working Load Limit(Max.)

Proof Test (Min.)

Min. Breaking Force

Max. Length Per 100 Links

Max. Weight

Per 100 FT

in

in

mm

lbs

kg

lbs

kN

lbs

kN

in

m

lbs

kg

1/8

0.156

4.0

375

170

800

3.6

1,600

7.1

94

2.39

19

8.8

3/16

0.218

5.5

750

340

1,500

6.7

3,000

13.3

99

2.51

42

19

1/4

0.281

7.1

1,250

570

2,500

11.1

5,000

22.2

104

2.64

76

34

5/16

0.343

8.7

1,900

860

3,800

16.9

7,600

33.8

114

2.89

115

52

3/8

0.406

10.3

2,650

1,200

5,300

23.6

10,600

47.2

128

3.25

166

75

7/16

0.468

11.9

3,500

1,590

7,000

31.1

14,000

62.3

142

3.60

225

102

1/2

0.531

13.5

4,500

2,040

9,000

40.0

18,000

80.1

156

3.96

289

131

5/8

0.656

16.7

6,900

3,130

13,800

61.4

27,600

122.8

194

4.92

425

193

3/4

0.781

19.8

9,750

4,420

19,500

86.7

39,000

173.5

220

5.59

612

278