Zipbolt Exterior XT Post Anchor

The 17.800 Zipbolt Exterior XT Post Anchor provides a strong, reliable, and weather-resistant solution for mounting exterior posts on decks, porches, and verandas. Designed for maximum structural stability, it features a durable base plate with five anchoring points — including a central lag screw for extra holding power. Its elevated design prevents moisture buildup at the post base, while the flush-mounted plate allows for a clean finish and compatibility with PVC sleeving. Built for long-term durability, the XT Post Anchor is finished with a double epoxy and acrylic-baked coating, ensuring exceptional corrosion resistance in outdoor environments.

Key Features

• Five-point base plate with central lag screw for enhanced stability

• Moisture-resistant design elevates posts above deck surface

• Flush profile allows for easy use with PVC sleeves or trim covers

• Durable double epoxy and acrylic-baked finish for weather protection

• Suitable for outdoor or indoor post installations

• Deck, porch, and veranda post installations

• Fencing, railings, and pergola framing

• Structural and architectural exterior projects

• Indoor installations requiring hidden base connections

• Product name: 17.800 Zipbolt XT Post Anchor

• Material: Steel with epoxy and acrylic-baked coating

• Finish: Double epoxy-coated, baked acrylic surface

• Connector type: Exterior surface-mounted post anchor

• Base plate size: 89 mm (3-1/2 in) square

• Base thickness: 10 mm (25/64 in)

• Shaft diameter: 13.5 mm (17/32 in)

• Shaft length: 275 mm (10-13/16 in)

• Minimum bore depth: 37 mm (1-29/64 in)

• Shaft center offset: 18 mm (23/32 in)

• Drive type: 6 mm hex bit

• Mounting: Surface installation with 5 anchoring points

• Advantages: Concealed, corrosion-resistant, and durable connection

• Recommended tools: Paddle bits, spade bits, 10 mm and 17 mm wrench, 6 mm hex bit

Steps

1. Prepare the Deck Surface

   • Add additional blocking under the decking as needed to support all screws and the center lag screw.

   • Bore a 10 mm (3/8 in) pilot hole at the mounting point.

2. Install the Main Shaft

   • Insert and tighten the lag end into the deck using a 10 mm wrench.

   • Stop when the machine thread section is ready to receive the base plate.

   • Wax may be applied to the lag thread for easier installation.

3. Attach the Base Plate

   • Slide the base plate over the shaft and tighten clockwise with a 17 mm wrench until flush with the deck surface.

   • Install all four outer screws for maximum strength.

4. Prepare the Post

   • Mark and drill a 38 mm (1-1/2 in) side hole to the specified depth.

   • Drill a 25 mm (1 in) center hole 19 mm (3/4 in) deep, then continue through with a 16 mm (5/8 in) bit until the two holes meet.

   • Ream the center hole if necessary.

   • The post should fit freely over the base plate nut.

5. Assemble and Tighten

   • Place the post over the shaft and insert the curved washer, pushing it to the very end of the shaft.

   • Install the gear housing and tighten using a 6 mm hex bit with a hand or power tool.

   • Finish by covering the access hole with a plug or sliding on a post sleeve.

6. Final Check

   • Ensure the post is firmly seated, straight, and secure.

   • For larger posts, the base plate can be routered into the post for a flush, concealed appearance.

Tips

• For best corrosion resistance, use stainless or epoxy-coated screws.

• Ensure the deck blocking below is adequate for all anchor points.

• Avoid using impact drivers during tightening to prevent over-torque.