5/16ft Grade 100 Swivel Self Locking Hook WLL 5,700 lbs - Heavy Duty

In this review of the 5/16' Grade 100 Swivel Self Locking Hook, the bottom line is simple: this hook is for professionals who need a compact, high-strength connection that can rotate freely and resist accidental disengagement. Tested on the job and inspected visually, the hook's 5,700 lb working load limit makes it useful for light- to mid-capacity rigging tasks where reliability and a self-locking latch reduce the risk of slippage. The review focuses on build quality, usability in field repairs, and whether the hook's Grade 100 alloy construction justifies its place in a lifting kit.

Key Features

• Working Load Limit: The 5,700 lb WLL gives a clear capacity for planning lifts and reduces guesswork when matching chain or slings.
• Breaking Strength: A 22,800 lb breaking strength provides a wide margin above the rated load for secure, compliant use.
• Grade 100 Alloy: Drop-forged Grade 100 steel delivers durable wear resistance and consistent performance under repeated loads.
• Swivel Action: The hook can rotate in any direction to relieve twist in chain and prevent binding during lifts.
• Self-Locking Latch: The latch prevents accidental catches on carrier beds and helps keep the connection closed during movement.
• Painted Finish: The blue painted finish aids visibility on the job and offers basic protection against surface corrosion.

Who It's For

The hook is geared toward riggers, utility crews, and maintenance technicians who need a compact, reliable connector for chain and sling assemblies and occasional field repairs. Its combination of swivel capability and a self-locking latch is particularly useful where rotation or movement is expected and a secure closure is required.

Those who need very heavy-capacity lifting (well above the 5,700 lb WLL) or stainless corrosion resistance for marine environments should look elsewhere; this product is best used where Grade 100 alloy steel and a painted finish meet the job demands.

Pros & Cons

Pros

• High strength for size thanks to Grade 100 alloy construction and a 4:1 safety factor.
• Swivel design reduces chain twist and makes alignment easier during lifts.
• Self-locking latch improves safety by preventing accidental openings on the job.
• Painted blue finish increases visibility during inspections and basic corrosion protection.

Cons

• Painted finish is not a substitute for specialized corrosion protection in harsh environments.
• Fixed WLL limits use for heavier industrial lifts that require larger hardware.

Specifications

Our Verdict

The 5/16' Grade 100 Swivel Self Locking Hook is a solid choice for professionals who need a compact, high-strength connector that swivels and secures itself under load. It represents good value when paired with compatible Grade 100 chain or alloy connecting links, though users in highly corrosive environments should consider alternate finishes or stainless options.

Frequently Asked Questions

Is this hook safe for overhead lifting?
Yes, when used within its 5,700 lb working load limit and inspected prior to use; do not exceed the WLL and avoid shock loads.

Can the hook rotate under load?
Yes, the swivel design allows rotation in any direction to relieve chain twist during lifts.

Does the painted finish protect against corrosion?
The painted blue finish offers basic protection and visibility but is not a substitute for specialized corrosion-resistant materials.