The BMM Hammerlock Chain Connector is a reliable, heavy-duty coupling link designed for fast, secure, and permanent connections in chain assemblies. Crafted from high-strength Grade 80 alloy steel, this connector delivers exceptional durability and load-bearing performance for demanding applications.FeaturesGrade 80 alloy steel construction: quenched and tempered for superior tensile strength, toughness, and resistance to wearHammerlock design: simple hammer-driven assembly creates a secure, tamper-resistant mechanical interlock (no welding required)Fast installation & repair: ideal for quick field connections, chain repairs, or extending lengths without downtimeBright yellow powder coat finish: enhances visibility and offers added corrosion protectionMarked with chain size and grade: ensures easy identification and compliance with safety standardsCommon ApplicationsCommercial fishing gear repairs (longlines, crab pots, lobster traps, groundlines)Overhead lifting slings and rigging setupsTowing safety chains, trailer connections, and recovery operationsGeneral chain joining, splicing, or attaching hooks/master linksSpecificationsMaterial: High-strength Grade 80 (G80 / T8) alloy steelManufacturing Process: Drop-forged, quenched and tempered for maximum toughness, tensile strength, and wear resistanceFinish: Bright yellow powder coat (standard on BMM models for enhanced visibility and corrosion protection in marine environments)Design Standard: US-type hammerlock (mechanical interlocking pin secured by hammering; no welding required)Safety Factor: 4:1 (minimum breaking strength is 4 Working Load Limit)Assembly: Hammer the pin flush using a heavy hammer for a secure, tamper-resistant mechanical lockSize (Chain Compatibility)WLL (Working Load Limit)A (mm)B (mm)C (mm)D (mm)E (mm)F (mm)Approx. Weight (kg)7mm (BMM Model – Primary)(fits 78mm G80 chain)2 tonnes (2,000 kg)(marine/fishing ratings up to 8T conservative)20248.59248.5958725578 (overall)0.20.510mm(fits 10mm G80 chain)3.153.2 tonnes2526111235401112689068800.30.613mm(fits 13mm G80 chain)5.35.4 tonnes293014154550141588117871000.650.816mm(fits 16mm G80 chain)8 tonnes34361819.8556018201041481081201.11.319mm / 20mm(fits 1920mm G80 chain)1216 tonnes40452225657522251301601301501.82.5Notes:Dimensions (AF) represent typical hammerlock geometry (e.g., A = body/pin area, C = inside length, E/F = overall dimensions). Exact values vary by manufacturer consult your supplier’s diagram or certs for precision.Safety factor: 4:1 (Minimum Breaking Strength = 4 WLL).BMM 7mm model typically features bright yellow powder coat for marine visibility and higher conservative ratings in fishing applications.Always match connector size to chain diameter/grade and never exceed the stated WLL.