Chain accessories

D Type Anchor Shackle — Anchor End Shackle

The D type anchor shackle is the heavy end shackle that connects the anchor shank to the first length of chain cable. It is a straight-sided bow with enlarged pin bosses and a tapered pin secured by a transverse split pin — not a rigging shackle, and not rated like one.

Ask for availabilityAll anchors & chain
Stud link anchor chain running the length of a deck into the chain stopper
12.5–162 mmChain diameter range
1.4 dPin diameter
1 in 25Break-test sampling

Where it sits in the cable

Working outboard from the anchor: the anchor shank takes the D-type end shackle, which takes the swivel forerunner, which takes the first shot of common chain. Because the end shackle stays outside the hawse pipe when the anchor is stowed, it does not have to pass over the cable lifter — which is why it can be a conventional bow shackle rather than a link-shaped Kenter.

Not a rigging shackle

This is worth saying plainly, because the two get confused in purchasing. A lifting or rigging shackle is rated by a working load limit, marked with it, and sized in the trade’s own series. An anchor end shackle is sized by the chain diameter it serves, is proof- and break-tested at the loads of that chain, and carries no working load limit at all. They are different products under different rules. Do not substitute one for the other in either direction.

Dimensions

Like the rest of the cable, the shackle is proportional to the chain diameter d: the pin is 1.4d, the shackle 8.7d long overall, 4.6d inside, 5.2d across, with a bow of 3.1d. Those proportions are what let an anchor and a cable specified independently actually go together.

Certification

Every shackle is proof-loaded at the proof load of the chain grade it serves. One unit per batch of 25 is destructively break-tested. Accessories are made in Grade 2 steel as a minimum regardless of the chain grade, forged or cast, and the dimensional tolerance is +5 % / −0 on diameter and ±2.5 % on the rest.

Specification

D type anchor shackle — dimensions and loads

Every size in the series. Scroll sideways on a phone.

D type anchor shackle — dimensions and loads
Nominal diameter d mmPin diameter d5 mm1,40 dLength L5 mm8,70 dInside length P5 mm4,60 dWidth W5 mm5,20 dBow F2 mm3,10 dProof load U2 kN0,00981 d²(44 − 0,08 d)Proof load U3 kN0,01373 d²(44 − 0,08 d)Breaking load U2 kN0,01373 d²(44 − 0,08 d)Breaking load U3 kN0,01961 d²(44 − 0,08 d)
12.517.5108.757.56538.866—92—
1419.6121.864.472.843.482—115—
1622.4139.273.683.249.6107150150214
17.524.5152.380.59154.3128179179256
1926.6165.387.498.858.9150211211301
20.528.7178.494.3106.663.6175244244349
2230.8191.4101.2114.468.2201281281401
2433.6208.8110.4124.874.4238333333475
2636.4226.2119.6135.280.6278389389556
2839.2243.6128.8145.686.8321450450642
304226113815693367514514734
3244.8278.4147.2166.499.2416583583832
3447.6295.8156.4176.8105.4468655655936
3650.4313.2165.6187.2111.65237327321045
3853.2330.6174.8197.6117.85808128121160
40563481842081246408968961280
4258.8365.4193.2218.4130.27039849841406
4461.6382.8202.4228.8136.4769107610761537
4664.4400.2211.6239.2142.6837117111711673
4867.2417.6220.8249.6148.8908127012701814
5070435230260155981137313731961
5272.8452.4239.2270.4161.21057147914792113
5475.6469.8248.4280.8167.41135158915892269
5678.4487.2257.6291.2173.61216170217022430
5881.2504.6266.8301.6179.81299181818182597
60845222763121861384193819382767
6286.8539.4285.2322.4192.21472206020602943
6489.6556.8294.4332.8198.41562218721873123
6692.4574.2303.6343.2204.61655231623163308
6895.2591.6312.8353.6210.81749244824483496
70986093223642171846258325833690
73102.2635.1335.8379.6226.31995279227923988
76106.4661.2349.6395.2235.62149300730074295
78109.2678.6358.8405.6241.82254315431544505
81113.4704.7372.6421.2251.12415338033804827
84117.6730.8386.4436.8260.42580361236125158
87121.8756.9400.2452.4269.72750384938495498
901267834144682792924409340935845
92128.8800.4423.2478.4285.23042425842586081
95133826.5437494294.53223451045106442
97135.8843.9446.2504.4300.73345468246826687
1001408704605203103532494349437060
102142.8887.4469.2530.4316.23658512051207312
105147913.5483546325.53850538953897697
107149.8930.9492.2556.4331.73980557155717957
111155.4965.7510.6577.2344.14245594159418486
114159.6991.8524.4592.8353.44447622462248889
117163.81017.9538.2608.4362.74652651165119299
12016810445526243724859680168019714
122170.81061.4561.2634.4378.24999699769979994
124173.61078.8570.4644.8384.451417195719510,276
127177.81104.9584.2660.4393.753547494749410,703
130182113159867640355717796779611,135
132184.81148.4607.2686.4409.257168000800011,426
137191.81191.9630.2712.4424.760838514851412,161
142198.81235.4653.2738.4440.264569036903612,906
147205.81278.9676.2764.4455.768349565956513,662
152212.81322.4699.2790.4471.2721710,10010,10014,426
157219.81365.9722.2816.4486.7760210,64010,64015,197
162226.81409.4745.2842.4502.2799111,18511,18515,975

Where these numbers come from. An accessory is proof- and break-tested at the load of the chain it serves, so the load columns here are the same UR W18 values as the chain table — that identity is a requirement, not a coincidence. Dimensions are the ISO 1704 proportions of the chain diameter d. Break test: one unit per batch of 25.

Documentation

What comes with the goods

  • Proof load on every unit, at the proof load of the chain grade it serves
  • Breaking-load test on one unit per batch of 25
  • Works certificate — material (Grade 2 steel minimum), forging or casting method, heat treatment
  • Dimensional check: diameter +5 % / −0, other dimensions ±2.5 %

Tell us the class your vessel is being built or surveyed to and we will quote against it, with the certificates that class requires. If you are replacing a shot of chain or a single accessory, send us the diameter and the grade stamped on the end link and we will match it.

Frequently asked questions

Is an anchor shackle the same as a rigging shackle?

No. A rigging shackle is rated and marked with a working load limit and sized in its own series. An anchor end shackle is sized by the chain diameter it serves, proof- and break-tested at that chain’s loads, and carries no working load limit. They fall under different requirements and must not be substituted for each other.

What size anchor shackle do I need?

The one matching your chain’s nominal diameter — the shackle series is indexed on chain diameter, not on the anchor. If you know the diameter and grade stamped on the chain’s end link, that is the whole specification. The table on this page gives the resulting pin diameter and bow dimensions so you can check them against the anchor shank eye.

How is the pin secured?

By a taper: the pin is driven through and held by a transverse split or taper pin through the eye. It is not a threaded pin and should not be treated as one. Renew the securing pin whenever the shackle is broken out and made up again.

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Tell us the diameter.

Send the diameter, the grade and the quantity — or the vessel’s Equipment Number if you are starting from scratch — and we will come back with availability and the certification package.

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