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Shackle - Class 1 Round Pin Chain - Carbon



  • RRC-271D Amend 1 Type IVB, Grade A, Class 1

  • All shackles meet or exceed Federal Specification RRC-271D

  • Working Load Limit and traceability codes shown as permanent marking on body and pin

  • Available in painted, galvanized and self-colored finishes (Dacromate coating upon special request only)

  • All shackles have alloy quenched and tempered pins

  • Shackles made from technically advanced microalloy material

  • Load break tests consistently show microalloy outperforms quenched and tempered carbon material

  • Shock load testing of assemblies at -300oF consistently demonstrate microalloy outperforms quenched and tempered carbon material*

  • Shackles exhibit extreme deformation before failure*

  • Special testing and certification including magnetic particle, proof load, and fatigue test available upon request at time of order

  • Special products engineering available to fit your special lifting, tie down, and pulling needs


*Independent lab verified
Click Here to view Metric Chart
SIZE

DIMENSIONS (INCHES)

SIZE

Diameter of Pin

Diameter of Hole

Width between Eyes

Inside Length

Outside Diameter of Eye

D

(nominal)

P

(nom)

E

(ref)

W
(nom)

L
(nom)

R
(max)

1/4

0.312

0.401

0.469

0.875

0.875

5/16

0.375

0.463

0.531

1.031

1.000

3/8

0.438

0.531

0.656

1.250

1.125

7/16

0.500

0.593

0.750

1.437

1.250

1/2

0.625

0.718

0.813

1.625

1.375

5/8

0.750

0.843

1.063

2.000

1.875

3/4

0.875

0.968

1.250

2.375

2.125

7/8

1.000

1.109

1.438

2.812

2.375

1

1.125

1.234

1.688

3.188

2.625

1 1/8

1.250

1.375

1.812

3.562

2.875

1 1/4

1.375

1.531

2.031

3.938

3.250

1 3/8

1.500

1.656

2.250

4.438

3.500

1 1/2

1.625

1.781

2.375

4.875

3.750

1 5/8

1.750

1.906

2.625

5.250

4.125

1 3/4

2.000

2.156

2.875

5.750

4.500

2

2.250

2.406

3.250

6.750

5.250

 

Size

Working Load Limit WLL (tons)*

Product Code

Painted

UPC 43927-

Galvanized UPC 43927-

Approx Weight Each (lbs)

1/4

3/4

M546

40304

40303

0.11

5/16

1

M547

40310

40309

0.17

3/8

1 1/2

M548

40316

40315

0.29

7/16

2

M549

40322

40321

0.40

1/2

3

M550

40328

40327

0.60

5/8

4 1/2

M551

40334

40333

1.2

3/4

6 1/2

M552

40340

40339

2.0

7/8

8 1/2

M553

41949

40344

3.0

1

10

M554

40350

40349

4.5

1 1/8

12

M555

40355

40354

6.5

1 1/4

14

M556

40360

40359

8.6

1 3/8

17

M566

40365

40364

12

1 1/2

20

M557

40370

40369

15

1 5/8

24

M585

40375

40374

22

1 3/4

30

M577

40380

40379

27

2

35

M558

40385

40384

36

 

*1 ton = 2000 lbs
WARNING
To Avoid Injury:
  • Do not exceed working load limit
  • Always follow safe rigging practices
  • Do not shock load or impact load
  • Do not replace pin with other than original equipment parts
  • Always inspect for wear and or damage before use.
  • Replace if damaged or worn
  • Please note side load limitations
  • Do not side load round pin shackles

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