A clevis grab hook is a type of chain hook designed to engage and “grab” a link of chain to secure, shorten, or tension a chain in transportation and tie-down applications. The H-330 and A-330 designations refer to versions for different chain grades:
H-330 (G43): Forged carbon steel, suitable for Grade 43 (high-test) chain.
A-330 (G70): Forged alloy steel, suitable for Grade 70 transport chain with higher strength and working load limits.
Materials & Construction
Forged Steel: Drop-forged for strength and durability.
Quenched & Tempered: Heat treated to improve toughness and fatigue resistance.
Clevis Connection: The hook is attached to the chain with a clevis pin, making it easy to install or remove when adjusting chains.
Design & Function
Grab Hook Profile: The hook’s throat is shaped to capture a chain link, holding it securely in place so that the chain doesn’t slip under tension.
No Safety Latch: Unlike slip hooks, grab hooks generally do not have a safety latch, relying on the chain link wedging into the throat for secure engagement.
Markings: Hooks are often stamped with their grade (G43 or G70) and size to match the correct chain.
Specification: