Blulu Ceramic Fence Insulators 50-Pack — 0.5" Hole Porcelain Lag Screw, Heavy-Duty Galvanized 1.8" Screw

Blulu 50-pack ceramic lag screw insulators are heavy-duty porcelain fittings that secure and electrically isolate fence wire on wooden posts for reliable agricultural and ranch fencing.

These porcelain insulators combine a smooth ceramic sleeve with a galvanized lag screw to keep electrified polywire, rope, tape, or cable off wooden posts while resisting weathering and minimizing energy loss. Supplied in a 50-piece package, they’re sized and shaped to suit a range of common fencing tasks and are intended for use where a durable, low-friction insulator is needed.

How do these insulators attach to wooden posts?

Each unit uses a galvanized lag screw integrated into a ceramic body. Pre-drill a pilot hole in the wooden post, then drive the lag screw in until the ceramic shoulder sits snugly against the wood. The ribbed screw helps secure the insulator against pull-out and keeps the ceramic sleeve aligned to hold the wire away from the post.

• Includes a 1.8-inch screw length for firm anchoring.
• Pre-drill recommended; avoid screwing ceramic in by hand.
• Ceramic shoulder creates a stable, insulated barrier.
• Ribbed lag threads improve grip in timber posts.

What wire types and sizes will fit these porcelain insulators?

The insulator’s central hole is roughly 0.5 inches in diameter, allowing common electrified conductors to run smoothly through the sleeve. It accommodates polyethylene lines, polyrope, narrow tape, wire or similar fence materials used on pastures and perimeters. The smooth ceramic interior reduces abrasion and helps prevent concentrated wear at contact points.

• 0.5-inch hole suitable for polywire, rope, tape, and narrow cable.
• Smooth ceramic surface lowers friction and wear.
• Works with single-strand and multi-strand fence materials.
• Good for both horizontal strands and top-line installations.

How weatherproof and durable are these insulators?

The combination of glazed ceramic and galvanized steel is chosen to withstand outdoor exposure without rapid degradation. Ceramic resists UV, heat, and most common weathering while the galvanized screw offers corrosion resistance. Together they aim to give long service life when installed correctly and inspected periodically.

• Glazed ceramic resists UV and minimizes conductor wear.
• Galvanized lag screw reduces rusting in outdoor conditions.
• Dense ceramic construction limits cracking under normal use.
• Pack of 50 lets you replace worn parts promptly.

What size are these insulators and how many come per pack?

Each insulator measures about 4 inches overall with a screw portion near 1.8 inches, making them suitable for most wooden post depths and standard fence line setups. The pack contains 50 identical ceramic lag screw insulators, intended to cover multiple posts or provide spare parts for maintenance. Their size and quantity support medium to large fencing projects or ongoing upkeep.

• Overall length ≈ 4 inches; screw ≈ 1.8 inches.
• Hole diameter ≈ 0.5 inches for versatile conductor fit.
• 50 pieces per package for broad coverage or replacements.
• Balanced size for common post diameters and fence heights.

Who is this for: Blulu’s 50-pack ceramic lag screw insulators suit farmers, ranchers, small-holding owners, and contractors who need dependable, low-friction insulators for wooden fence posts. They are useful when replacing worn insulators, outfitting a new electric fence line, or stocking up on spare parts to keep fences functioning with minimal downtime.