Miller 18D-2-Z7/ 400 Lb Auto-locking Aluminum Carabiner

Product Description

The MILLER 18D-2-Z7/ is an auto-locking aluminum carabiner rated for 400 pounds of load capacity. Designed for fall protection and height-safety applications, this carabiner features an automatic gate-locking mechanism that engages without manual intervention, reducing the risk of accidental gate opening during use. The aluminum construction keeps the unit lightweight while maintaining the structural strength required for occupational safety applications. It measures 9 inches in length and 1.25 inches in width, with a gate opening of 2.25 inches. Licensed riggers, safety supervisors, and qualified fall protection installers are the typical professionals who specify and deploy this hardware on job sites.

This carabiner is suited for residential and commercial work-at-height scenarios including tower work, construction, roofing, and general fall arrest or fall restraint systems. The auto-locking gate is especially practical in environments where workers are frequently connecting and disconnecting lanyards or positioning lines, reducing steps in the connection sequence while maintaining code-compliant gate security. The 0.85-pound unit weight makes it practical for tool lanyards and personal protective equipment harness anchor points.

Key Features

• 400-pound rated load capacity for fall protection applications
• Auto-locking gate engages automatically without a secondary manual step
• Aluminum construction provides a lightweight build at 0.85 pounds
• Gate opening of 2.25 inches accommodates standard anchor hardware and D-rings
• 9-inch length and 1.25-inch width suit standard harness connector points

Compatibility

Designed as an OEM-style replacement or direct-fit carabiner for standard fall protection harness systems and lanyards using auto-locking connectors rated for personal fall arrest.

Installation Notes

Installation and inspection of fall protection hardware must be performed by a qualified person in accordance with OSHA 29 CFR 1926.502 and applicable ANSI Z359 standards. Inspect the gate locking mechanism and body for deformation, corrosion, or cracks before every use. Never load a carabiner in the gate-open position or apply side-loading forces beyond the rated minor-axis load. Remove from service immediately following any fall event regardless of visible damage.