MEGA Swivel 10K Steel Anchor + Weld-On Puck Combo
This combo kit packages Frontline's two-piece steel anchorage system in one box: the STM10K-SA MEGA Swivel 10K anchor and the STMP10K-WO weld-on puck it mounts to. The anchor's revolutionary swivel ring design lets the D-ring rotate 360 degrees and flip 180 degrees side to side, with heavy gauge heat treated alloy steel, a reinforced bridge, and a patent pending key lock that keeps the D-ring seated and locked in its swivel housing under heavy loads.
The 3 x 1 inch unplated mild steel puck welds permanently to structural steel with a 3/8 inch minimum fillet, and the anchor threads on with the included plated Grade 8 5/8-11 bolt and internal tooth lock washer - rated up to 10,000 lbs tensile strength, supporting permanent and temporary installations on steel. The welding procedure must be approved by an engineer or other qualified person for the installation location.
Who Needs This Product
This product is a complete two-piece steel anchorage kit - the permanent weld-on puck plus the removable 10K swivel anchor that rides on it. Per our kit rule it lives alongside its components: buy the combo when you are starting a new anchorage location, add bare pucks to extend the route, and carry one swivel anchor between them. Each worker still needs a full body harness and a compatible connecting device.
Features
Everything in one kit
MEGA Swivel 10K anchor, weld-on puck, plated Grade 8 bolt, and internal tooth lock washer ship together.
Full swivel D-ring
Rotates 360 degrees and pivots 180 degrees side to side, so the lifeline tracks the worker without side-loading.
Key lock swivel housing
The patent pending key lock keeps the D-ring seated and locked, preventing the steel from spreading under heavy loads.
Permanent puck, removable anchor
Weld the puck once; the anchor threads on and off and moves to the next welded location.
Heat treated alloy steel
Heavy gauge zinc plated alloy steel with a reinforced bridge rated up to 10,000 lbs tensile strength.
Engineer-approved welding
The weld procedure must be approved by an engineer or qualified person for the structure at the install location.
Technical Specifications
| SKU | STMP10K-WO+STM10K-SA |
|---|---|
| Type | Weld-on puck with steel MEGA Swivel 10K anchor (combo kit) |
| Kit contents | STM10K-SA swivel anchor; weld-on puck; plated Grade 8 5/8-11 bolt; internal tooth lock washer |
| Tensile strength | Rated up to 10,000 lbs |
| D-ring movement | 360 degree rotation; 180 degree side-to-side pivot |
| Puck size | 3 in diameter x 1 in thick, 5/8-11 threaded hole |
| Weld | 3/8 in (9.5 mm) minimum fillet per the installation drawing |
| Bolt torque | 75 to 90 ft-lbs (100 to 120 Nm) |
| Materials | D-ring connector: zinc plated alloy steel (10,000 lbs min); puck: unplated mild steel; fasteners: zinc plated steel, Grade 8 |
| User capacity | 130 to 310 lbs max per ANSI; 130 to 425 lbs max per OSHA |
| Installations | Permanent and temporary installations supported for steel |
| Use modes | Fall protection on structural steel; anchor follows the worker with full swivel freedom |
Welding is engineering-controlled. The welding procedure must be approved by an engineer or other qualified person as compatible with the structural and operational characteristics of the installation location, and the weld must meet the 3/8 inch minimum on the installation drawing. One worker per anchor - verify the completed anchorage for the intended fall protection load and calculate fall clearance before tying off.
Compliance Standards
ANSI User Capacity
Rated for users from 130 to 310 lbs maximum under the ANSI capacity range on the spec sheet.
OSHA User Capacity
Rated for users from 130 to 425 lbs maximum under the OSHA capacity range on the spec sheet.
10,000 lb Anchor Rating
The MEGA Swivel 10K anchor in this kit is rated up to 10,000 lbs tensile strength.
Qualified-Person Welding
Anchorage qualification rests with a qualified person - the weld procedure must be engineer approved for the structure.
Typical Applications
Installation Overview
Follow the manufacturer's manual. The sequence below is an overview only.
- Inspect. Check the anchor, swivel action, puck, threads, and hardware before installation.
- Qualify the weld. Have an engineer or qualified person approve the weld procedure for the structure.
- Position. Locate the puck at the engineered anchor location on clean, prepared steel.
- Weld. Apply the 3/8 inch minimum fillet weld per the installation drawing, then let it cool and inspect the weld.
- Mount the anchor. Thread the Grade 8 bolt with lock washer through the swivel anchor into the puck and torque to 75 to 90 ft-lbs.
- Connect. Attach the connecting device to the D-ring and verify fall clearance before work begins.
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: bending, cracks, nicks, or wear at the connection point.
- Swivel action: binding, grinding, or play in the rotation or pivot; key lock fully seated.
- Weld: cracks, undercut, corrosion, or any visible weld defect.
- Threads and bolt: damage, corrosion, or loss of torque on the Grade 8 hardware.
- Markings: missing or illegible product label.
Retire the anchor and remove the puck location from service immediately after any fall arrest event, any deformation or weld damage, or any condition where the system cannot be verified as safe for service.
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 STMP10K-WO+STM10K-SA Submittals and Documentation
Frontline STMP10K-COMBO Spec Sheet (PDF)Kit contents, weld callout, hardware, and capacity ratings. Frontline STMP10K-COMBO User Manual (PDF)Welding requirements, torque, inspection, and retirement procedures.Compatible and Related Products
- Frontline STMP10K-WO Weld-On Puck. Bare pucks to extend the anchorage route - one swivel anchor covers them all.
- Frontline STM5810K MEGA Swivel 10K Steel Anchor. The bolt-on 10K swivel anchor variant for steel structures.
- Frontline RW Weld-On Commercial Roof Anchor. A weld-on U-rod anchor for structural steel members.
- Frontline RO4W Multifunction 4-Way Anchor. A multifunction anchor for concrete, metal, and wood substrates.
Setting Up a Welded Anchorage Route?
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.
