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Spring Hooks

Spring Hooks

Spring Hooks

Spring hooks combine the convenience of an open hook with the security of a spring-loaded gate. The gate closes automatically under spring pressure after the hook is attached - the load can't fall off accidentally, but the operator can release by depressing the gate.

Also known as: Spring Gate Hook, Carabiner Hook, Gated Hook, Stainless Spring Hook.

Stainless A4-70 G316 spring hooks in 4mm x 40mm, 5mm x 50mm and 6mm x 60mm sizes. The first dimension is the wire diameter; the second is the overall length.

GRADES AND MATERIALS

Stainless A4-70 G316 (marine grade): 700 MPa minimum tensile, 316-family austenitic stainless with added molybdenum (2-3%) for chloride-pitting resistance. The standard for direct saltwater exposure, ocean spray, chlorinated pool plant and food-grade processing. Largely non-magnetic - cold-formed sections may show slight residual magnetism from manufacture.

INSTALLATION AND USE

Depress the gate, insert the attachment point through the open gate, release the gate - it springs closed under spring pressure. To release, depress the gate and lift the hook off. The gate spring is the safety mechanism - check periodically that it still closes positively under spring force.

A NOTE ON GALLING

Stainless threads can gall under tension - apply a thin film of nickel-based anti-seize from the Anti-Seize range to the male thread before assembly. Tighten slowly, never with an impact driver.

SIZE AND WLL

Wire diameter determines load capacity. 4mm = ~50kg, 5mm = ~100kg, 6mm = ~150kg (typical figures - confirm per-SKU). NOT for overhead lifting or safety-critical fall-arrest applications.

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