RR-C-271 Chains And Attachments, Carbon And Alloy SteelThis specification covers carbon and alloy steel chain of commercial quality together with the attachments most commonly used with this chain.

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Trade size (nom)

(inches)

Dimension (D) (min) (inch)

Diameter pin (P) (min) (inches)

Diameter unthreaded eye (E) (ref) (inches)

Width between eyes (W) ± nom tolerance (inches)

Length inside (L)

± nom tolerance

(inches)

Major dia. threaded eye (ref) (inches)

Dia. outside eye (R) (max) (inches)

Weight per

100 shackles (approx) (pounds)

3/16

1/4

5/16

3/8

7/16

1/2

5/8

3/4

7/8

1

1-1/8

1-1/4

1-3/8

1-1/2

1-5/8

1-3/4

2

2-1/4

2-1/2

3

3-1/2

4

0.18

0.24

0.30

0.36

0.42

0.48

0.59

0.71

0.83

0.95

1.07

1.19

1.31

1.42

1.54

1.66

1.90

2.14

2.38

2.85

3.32

3.8

0.24

0.30

0.37

0.43

0.49

0.61

0.73

0.85

0.98

1.10

1.22

1.34

1.46

1.58

1.71

1.95

2.19

2.44

2.68

3.17

3.66

4.14

0.312

0.406

0.469

0.531

0.594

0.719

0.844

0.969

1.094

1.219

1.344

1.469

1.625

1.75

1.875

2.156

2.406

2.656

2.906

3.406

3.906

4.406

0.375 ±0.125

0.469 ±0.125

0.531 ±0.125

0.656 ±0.125

0.750 ±0.125

0.812 ±0.125

1.062 ±0.125

1.250 ±0.125

1.438 ±0.125

1.688 ±0.125

1.812 ±0.125

2.031 ±0.125

2.250 ±0.188

2.375 ±0.188

2.625 ±0.188

2.875 ±0.188

3.250 ±0.188

3.875 ±0.188

4.125 ±0.250

5.00 ±0.25

5.25 ±0.25

5.50 ±0.25

0.750 ±0.062

0.875 ±0.062

1.031 ±0.062

1.125 ±0.125

1.438 ±0.125

1.625 ±0.125

2.000 ±0.125

2.375 ±0.250

2.812 ±0.250

3.188 ±0.250

3.562 ±0.250

3.938 ±0.250

4.438 ±0.250

4.875 ±0.250

5.25 ±0.25

5.75 ±0.25

6.75 ±0.50

7.125 ±0.500

8.0 ±0.5

9.00 ±0.75

10.50 ±0.75

12.00 ±0.75

0.281

0.344

0.406

0.469

0.531

0.656

0.781

0.906

1.031

1.156

1.297

1.422

1.547

1.672

1.797

2.047

2.297

2.547

2.797

3.297

3.797

4.297

0.625

0.875

1

1.25

1.25

1.375

1.875

2.125

2.375

2.625

2.875

3.25

3.5

3.75

4.125

4.5

5.25

5.75

6.25

6.75

8.5

9.5

5

11

17

28

42

68

121

214

310

450

660

890

1,200

1,620

2,020

2,500

3,600

5,000

7,400

10,600

18,900

27,100