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Crosby® Alloy Master Links

The Crosby Group

Ratings below are for use with chain slings fabricated in accordance with ASME B30.9.

Crosby A-342 Alloy Master Link

  • Alloy Steel — Quenched and Tempered.
  • Individually Proof Tested to values shown, with certification.
  • Proof Tested with 60% inside width special fixtures sized to prevent localized point leading per ASME A-952.
  • Crosby A-345 Alloy Master Link
  • Meets or exceeds all requirements of ASME B30.26 including identification, ductility, design factor, proof load and temperature requirements. Importantly, these links meet other critical performance requirements including fatigue life, impact properties and material traceability, not addressed by ASME B30.26.
  • Forgings have a Product Identification Code (PIC) for material traceability, along with the size, the name Crosby and USA in raised lettering.
  • Selected sizes designated with “W” in the size column have enlarged inside dimensions to allow additional room for sling hardware and crane hook.
  • Crosby 1-1/4” to 2” 342/345 master links are type approved to DNV Certification Notes 2.7-1- Offshore Containers. These Crosby master links are 100% proof tested, MPI and impact tested. The tests are conducted by Crosby and 3.1 test certification is available upon request.
  • Incorporates patented QUIC-CHECK® deformation indicators.

A-342 Alloy Master Links

SizeMfg. #CSI Ref. #Weight
Each
(lbs.)
Working
Load
Limit
(lbs.)
Proof
Load
(lbs.)**
(in.)(mm)
1/2W13W 1014266 CS-07-0951 1.3 7,400 17,200
5/816 1014280 CS-07-0952 1.5 9,000 18,000
3/4W19W 1014285 CS-07-0953 2.0 12,300 28,400
7/8W22W 1014319 CS-07-0954 3.3 15,200 35,200
1W26W 1014331 CS-07-0955 6.1 26,000 60,000
1-1/4W32W 1014348 CS-07-0956 12.0 39,100 90,400
1-1/2W38W 1014365 CS-07-0957 18.6 61,100 141,200
1-3/444 1014388 CS-07-0958 25.2 84,900 169,800
251 1014404 CS-07-0959 37.0 102,600 205,200
2-1/457 1014422 CS-07-0960 54.1 143,100 289,200
2-1/263 1014468 CS-05-2980 68.5 160,000 320,000
2-3/470 1014440 CS-05-2981 94.0 216,900 433,800
376 1014486 CS-05-2982 115 228,000 456,000
3-1/483 1014501 CS-05-2983 145 262,200 524,400
3-1/289 1014529 CS-05-2984 200 279,000 558,000
3-3/495 1015051 CS-05-2985 198 336,000 672,000
4102 1015060 CS-05-2986 264 373,000 746,000
†† 4-1/4†† 108 1015067 CS-05-2987 302 354,000 708,000
†† 4-1/2†† 114 1015079 CS-05-2988 345 360,000 720,000
†† 4-3/4†† 121 1015088 CS-05-2989 436 389,000 778,000
†† 5†† 127 1015094 CS-05-2990 516 395,000 790,000

*Ultimate Load is 5 times the Working Load Limit. Based on single leg sling (in-line load), or resultant load on multiple legs with an included angle less than or equal to 120 degrees. Applications with wire rope and synthetic sling generally require a design factor of 5.
**Proof Test Load equals or exceeds the requirement of ASTM A952(8.1) and ASME B30.9.
††Welded Master Link.

A-342 Alloy Master Link Dimensions

Crosby A-342 Alloy Master Link

SizeDimensions (in.)
(in.)(mm)ABCDeformation
Indicator
1/2W13W 0.62 2.80 5.00 3.50
5/816 0.62 3.00 6.00 3.50
3/4W19W 0.73 3.20 6.00 4.00
7/8W22W 0.88 3.75 6.38 4.50
1W26W 1.10 4.30 7.50 5.50
1-1/4W32W 1.33 5.50 9.50 7.00
1-1/2W38W 1.61 5.90 10.5 7.50
1-3/444 1.75 6.00 12.0 7.50
251 2.00 7.00 14.0 9.00
2-1/457 2.25 8.00 16.0 10.0
2-1/263 2.50 8.38 16.0 11.0
2-3/470 2.75 9.88 18.0 12.5
376 3.00 9.88 18.0 13.0
3-1/483 3.25 10.0 20.0 13.5
3-1/289 3.50 12.0 24.0 15.5
3-3/495 3.75 10.0 20.0 13.5
4102 4.00 12.0 24.0 16.0
†† 4-1/4†† 108 4.25 12.0 24.0 -
†† 4-1/2†† 114 4.50 14.0 28.0 -
†† 4-3/4†† 121 4.75 14.0 28.0 -
†† 5†† 127 5.00 15.0 30.0 -

 

A-345 Master Link Assembly with Engineered Flat

for use with S-1325A coupler link.

SizeMfg. #CSI Ref. #Weight
Each
(lbs.)
Working
Load Limit
Based on 5:1
Design Factor
(lbs.)
Proof
Load
(lbs.)**
(in.)(mm)
3/4W19W 1014739 CS-07-0961 3.5 12,300 28,400
7/8W22W 1014742 CS-07-0962 4.8 15,200 35,200
1W26W 1014766 CS-07-0963 9.3 26,000 60,000
1-1/4W32W 1014779 CS-07-0964 15.8 39,100 90,400
1-1/2W38W 1014807 CS-07-0965 34.1 61,100 141,200
1-3/444 1014814 CS-07-0966 46.7 84,900 169,800
251 1014832 CS-07-0967 67.2 102,600 205,200
2-1/264 1014855 CS-04-2991 206 160,000 320,000
2-3/470 1014864 CS-04-2992 282 216,900 433,800
4102 1014999 CS-04-2993 667 373,000 746,000

*Ultimate Load is 5 times the Working Load Limit. The maximum individual sublink working load limit is 75% of the assembly working load limit except for 2-1/2”and 2-3/4”, which are 100% of assembly working load limit. Applications with wire rope and synthetic sling generally require a design factor of 5.
**Proof Test Load equals or exceeds the requirement of ASTM A952(8.1) and ASME B30.9.

A-342 Alloy Master Link Dimensions

SizeDimensions (in.)
(in.)(mm)ABCDEFGDeformation
Indicator
3/4W19W 0.73 3.20 6.00 0.56 3.35 1.77 0.30 4.00
7/8W22W 0.88 3.75 6.38 0.56 3.35 1.77 0.30 4.50
1W26W 1.10 4.30 7.50 0.75 3.94 2.36 0.33 5.50
1-1/4W32W 1.33 5.50 9.50 1.00 6.30 3.54 0.51 7.00
1-1/2W38W 1.61 5.90 10.5 1.25 7.09 3.94 0.65 7.50
1-3/444 1.75 6.00 12.0 1.38 8.00 5.00 0.73 7.50
251 2.00 7.00 14.0 1.50 9.00 5.75 - 9.00
2-1/264 2.50 8.38 16.0 2.50 16.0 8.38 - 11.0
2-3/470 2.75 9.88 18.0 2.75 18.0 9.88 - 12.5
4102 4.00 12.0 24.0 3.50 24.0 12.0 - 15.5***

*** Sublink only.

Grade 100 Alloy Master Links

Crosby A-1342N Alloy Master Links

  • Alloy Steel - Quenched and Tempered.
  • Individually proof tested to values shown with certification.
  • Proof tested with fixture sized to prevent localized point loading per ASTM A952.
  • Proof test certification shipped with each link.
  • All sizes are drop forged.
  • “Look for the Platinum Color - Crosby Grade 100 Alloy Products.”
  • Engineered Flat for use with S-1325A coupler link.

Size

Mfg. #

CSI Ref. #

Designation Marking

Proof Load (lbs.)

Weight Each (lbs.)

Working Load Limit (lbs.)*

(in.)

(mm)

1/4

6-7

1011403

CS-07-0970

X 1

17,200

1.1

8,600

5/16

8

1011412

CS-07-0971

X 2

22,800

1.7

11,400

3/8

10

1011421

CS-07-0972

X 3

35,200

2.5

17,600

1/2

13

1011430

CS-07-0973

X 4

60,000

6.2

30,000

5/8

16

1011449

CS-07-0974

X 5

90,400

10.6

45,200

3/4

19

1011458

CS-07-0975

X 6

141,200

18.8

70,600

7/8

22

1011467

CS-07-0976

X 7

170,800

28.8

85,400

* Minimum Ultimate Load is 4 times the Working Load Limit.

 

Crosby A-1342N Alloy Master Links

Size

Dimensions (in.)

(in.)

(mm)

A

B

C

1/4

6-7

0.6

2.5

5

5/16

8

0.7

2.75

5.5

3/8

10

0.81

3

6

1/2

13

1.09

4

8

5/8

16

1.34

5

9

3/4

19

1.63

5.25

10.5

7/8

22

1.88

6

12

 

A-1345N Master Link Assembly

Crosby A-1345N Alloy Master Links

  • Alloy Steel - Quenched and Tempered.
  • Individually proof tested to values shown with certification.
  • Proof tested with fixture sized to prevent localized point loading per ASTM A952.
  • Proof test certification shipped with each link.
  • All sizes are drop forged.
  • “Look for the Platinum Color - Crosby Grade 100 Alloy Products.”
  • Engineered Flat for use with S-1325A coupler link.

Designation Marking

Mfg. #

CSI Ref. #

Grade 100 Chain Size

Proof Load (lbs.)

Working Load Limit (lbs.)*

(in.)

(mm)

X 2

1011501

CS-07-0977

n/a

6

19,200

9,600

X 3

1011510

CS-07-0978

1/4-5/16

7-8

34,200

17,100

X 4

1011529

CS-07-0979

3/8

10

52,800

26,400

X 5

1011538

CS-07-0980

1/2

13

90,000

45,000

X 6

1011547

CS-07-0981

5/8

16

135,600

67,800

X 7

1011556

CS-07-0982

3/4

19

211,800

105,900

X 8

1011565

CS-07-0983

7/8

22

256,200

128,100

* Minimum Ultimate Load is 4 times the Working Load Limit.

 

Crosby A-1345N Alloy Master Links

Designation Marking

Weight Each (lbs.)

Dimensions (in.)

A

B

C

D

E

F

G

X 2

2.9

0.7

2.75

5.5

0.5

1.57

3.35

0.24

X 3

4.2

0.81

3

6

0.56

1.77

3.35

0.3

X 4

9.6

1.09

4

8

0.75

2.36

3.94

0.33

X 5

19.3

1.34

5

9

1

3.54

6.3

0.51

X 6

31.4

1.65

5.25

10.5

1.25

3.94

7.09

0.65

X 7

54.2

1.88

6

12

1.5

4.25

8

0.81

X 8

112.2

2.25

8

16

1.88

6

12

0.88

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