The Key-Lock Swivel That Started the Family
The STM585K MEGA Swivel incorporates a revolutionary swivel ring design: a D-ring that rotates 360° and flips back and forth through 180°, so the connection point follows the worker instead of side-loading. Its strength comes from heavy gauge heat treated alloy steel, a reinforced bridge, D-ring, and locking caps — and its patent pending key lock design keeps the D-ring seated and locked into the swivel housing, preventing the steel from spreading outward under heavy loads.
Rated at 5,000 lbf (22 kN) tensile strength with a 310 lb maximum user capacity and a 1,000 lb working load, the zinc plated STM585K installs on steel structures with a variety of installation kits to suit the application. It is reusable — the bolt is easily replaced when moving to the next work area — and works in vertical, horizontal, and overhead applications for fall protection, rescue, lifting, hoisting, and tie-back. Meets ANSI Z359.1-2007 and Z359.7-2011, OSHA CFR 1926.502 and 1910.140.
Who Needs This Product
This product is an anchorage connector — the tie-off point of a personal fall protection system. The steel structure it bolts to is the anchorage; the worker wears a full body harness; a lanyard or self-retracting lifeline connects to the swiveling D-ring. Crews that work around their anchor — not just below it — are who the MEGA Swivel was designed for.
Features
360° + 180° articulation
The D-ring rotates a full circle and flips back and forth, keeping the connecting device aligned with the load path.
Patent pending key lock
The key lock design keeps the D-ring seated and locked in its swivel housing, preventing the steel from spreading under heavy loads.
Heat treated alloy steel
Heavy gauge alloy steel with a reinforced bridge, D-ring, and locking caps delivers the MEGA Swivel strength.
Reusable by design
The bolt is easily replaced when moving to the next work area — the anchor relocates with the crew.
Installation kit options
Installs on steel structures with a variety of installation kits to suit the application.
More than fall protection
Rated for rescue applications, lifting, hoisting, and tie-back per the user manual.
Technical Specifications
| SKU | STM585K |
|---|---|
| Type | MEGA Swivel bolt-on steel anchorage connector |
| Tensile strength | 5,000 lbf / 22 kN |
| Maximum user capacity | 310 lbs / 140 kg (single user) |
| Working load | 1,000 lbs / 454 kg |
| Swivel material | Zinc plated steel |
| Swivel weight | 0.85 lbs |
| Articulation | 360° rotation; 180° flip |
| Key dimensions | 3.0 in (76.2 mm) tall; 2.25 in (57.15 mm) diameter base; 1.05 in (26.6 mm) ring opening |
| Applications | Vertical, horizontal, and overhead steel installations |
| Standards | ANSI Z359.1-2007, ANSI Z359.7-2011; OSHA CFR 1926.502, CFR 1910.140 |
Match the installation kit to the structure. The MEGA Swivel carries its rating only when installed on qualifying steel with the correct installation kit and hardware per the user manual. A competent person must verify the structure and the bolted connection before anyone ties off. One worker per anchor, 310 lbs maximum including tools.
Compliance Standards
ANSI Z359.1-2007
Meets the American National Standard safety requirements for personal fall arrest system components.
ANSI Z359.7-2011
Third-party product testing and certification requirements of the Z359 fall protection code.
OSHA CFR 1926.502
Designed to the OSHA construction criteria for fall protection systems and anchorage strength.
OSHA CFR 1910.140
Designed to the OSHA general industry criteria for personal fall protection systems.
Typical Applications
Installation Overview
Follow the manufacturer's manual. The sequence below is an overview only.
- Verify the steel. A competent person confirms the steel structure can support the loads required by the manual.
- Select the kit. Choose the installation kit and hardware the manual specifies for your steel application.
- Prepare the mount. Drill the mounting hole at the planned location per the kit instructions.
- Bolt the anchor. Install the MEGA Swivel and torque the bolt to the manual specification.
- Check the swivel. Confirm the D-ring rotates and flips freely and the key lock keeps it seated in the housing.
- Connect and relocate. Attach the lanyard or SRL; when the work moves, replace the bolt and reinstall at the next location.
Inspection and Retirement
Inspect before each use, with a documented competent-person inspection at least every 6 months. Pull the equipment from service for any of the conditions below.
- D-ring and bridge: deformation, spreading, cracks, nicks, or corrosion.
- Swivel action: smooth 360° rotation and 180° flip with no binding or grinding.
- Key lock and caps: D-ring seated and locked in the housing with no excessive play.
- Bolt and hardware: correct kit hardware, full engagement, correct torque, no thread damage.
- Markings: product label and rating legible.
Retirement triggers: any fall arrest loading, D-ring spreading or deformation, a swivel that binds, key lock damage, corrosion, or any condition where the inspector cannot verify the anchor is fit for service. Replace bolts per the manual rather than reusing questionable hardware.
Fall ProtectionDistributors, LLC Free Tool · No Signup · OSHA 1926.502 Free Interactive Tool Fall Protection Calculator Pick your system. Run the math. Generate a plan. 1Pick Your SystemDetermine fall restraint vs. fall arrest based on your work surface, edge access, and clearance. 2Run the MathCalculate exact fall clearance required below the work surface for your SRL or lanyard setup. 3Generate a PlanGet a printable OSHA-compliant Fall Protection Plan structured around 29 CFR 1926.502(k).
Frequently Asked Questions
Frontline STM585K Submittals and Documentation
Frontline STM585K Spec Sheet (PDF)Dimensions, materials, strength ratings, and the full compliance summary. Frontline STM585K Test Report (PDF)Third-party laboratory test results documenting the strength rating. Frontline STM585K User Manual (PDF)Installation kits, use, inspection, and retirement procedures.Compatible and Related Products
- Frontline STM585K-SS MEGA Swivel 316 Stainless Anchor. The 316 stainless steel version for corrosive environments.
- Frontline STM10K-SA MEGA Swivel 10K Anchor. The 10,000 lb rated swivel-only big brother.
- Frontline SWX100N-QPQ-CTS Reinforcement Backer Plate. The 4x6 inch backer plate that reinforces MEGA Swivel mounts.
- Frontline RO Commercial Roof Anchor. The ANSI Z359.18 roof anchor for concrete, metal, and wood decks.
Specifying MEGA Swivel Anchor Points?
Need help specifying the right system for your jobsite? Confirm your application, anchorage, and clearance with us and we will walk through the kit list so the right equipment ships together.
Call 863-703-4522 to talk to a fall protection specialist.
