• Mantus M3 duplex-stainless chain hook product view
1 1

Mantus

Mantus M3 CH4 Chain Hook — 1/2–5/8 in (12–16 mm)

Mantus M3 CH4 Chain Hook — 1/2–5/8 in (12–16 mm)

$ 282.00 USD
$ 282.00 USD
Sale Sold out
Shipping calculated at checkout.

M3CH4

  • 1/2–5/8 in / 12–16 mmChain fit
  • 8,250 lb / 3,742 kgWorking load limit
  • 2205 duplexStainless steel

CH4 latching chain hook for 1/2–5/8 in (12–16 mm) anchor chain. It remains captured when the chain goes slack.

See full product details and specifications
  • Ships in 1–5 business days
  • 30-day returns
  • Advice from real cruisers

M3 Locking Chain Hook - Duplex 2205 Stainless (for 1/2–5/8 in chain)


Connect a snubber or bridle to your anchor chain with a compact, locking chain hook. The spring-latched gate closes around the chain link to keep the hook engaged even when the chain is slack, helping to prevent accidental unhooking during anchoring maneuvers. The low-profile body is designed for clearance at the bow and to pass through many bow rollers.

Key features

  • Locking, spring-latched design that closes around the chain link to help prevent accidental release when the chain is unloaded.

  • Duplex 2205 stainless steel for high strength and corrosion resistance in marine environments.

  • Ideal for use with snubbers and bridles.

  • Compatible chain types: BBB, Proof Coil, High Test, and stainless chain (verify link dimensions).

  • Chain size range: 1/2" to 5/8" (approx. 12–16 mm).

Usage notes: Always confirm chain size and link dimensions before use. Inspect hook, latch, and line regularly. Compatibility with specific bow rollers varies by vessel hardware.

 

Shipping & lead times

We're a small team of boaters and we pack orders within 1–5 business days (no weekend or holiday packing). You'll get an email with tracking as soon as a label goes on your box.

Specialty items — fire extinguishers (dangerous goods) and low-stock or built-to-order gear — can take longer; the product description will say so. On a tight timeline or meeting your boat somewhere specific? Contact us and we’ll work out the fastest way to get gear to you.

International orders ship DDU: local duties, taxes, and customs fees are the buyer’s responsibility. Full details in our shipping policy.

Returns & refunds

30-day returns from the date of purchase. Items must be unused, in the original packaging with all cables and accessories, with proof of purchase.

Contact us before shipping anything back — we’ll send the return form that must accompany your return. Fire extinguisher and lithium battery items carry a $15 administrative fee on returns.

Read the full refund policy.

Ask a cruiser before you buy

Everyone here is a current or past cruiser — we’ve docked short-handed, re-rigged at anchor, and chased 12V gremlins too. Not sure this is the right fit for your boat? Send us your question before you order and we’ll give you a straight answer.

Mantus M3 CH4 Chain Hook — 1/2–5/8 in (12–16 mm) $ 282.00
View full details

M3 chain-hook sizing

The M3 closes around a chain link so it stays attached when the rode goes slack. It is intended for connecting a snubber or bridle and fits BBB, Proof Coil, High Test, and stainless chain. The hook body is 2205 duplex stainless steel.

HookChain diameterWorking load limitUltimate breaking strengthRecommended snubber rope
CH11/4–5/16 in (6–8 mm)2,507 lb (1,137 kg)10,028 lb (4,549 kg)1/2–5/8 in (13–16 mm)
CH25/16–3/8 in (8–10 mm)3,344 lb (1,517 kg)13,376 lb (6,068 kg)5/8–3/4 in (16–19 mm)
CH33/8–1/2 in (10–13 mm)4,803 lb (2,179 kg)19,214 lb (8,715 kg)3/4–1 in (19–25 mm)
CH41/2–5/8 in (12–16 mm)8,250 lb (3,742 kg)32,993 lb (14,965 kg)1–1 1/4 in (25–32 mm)

Choose the smallest M3 hook that fits the chain unless higher-grade chain requires the next size.