Hy-Ko BK-40 Series 4-Inch Zinc House Numbers

Solid coated zinc construction sets these house numbers apart from the plastic junk that fades and cracks after two Montana winters. At 4 inches tall with a satin black finish, they’re visible through snow buildup and won’t blind you with glare when the sun hits them just right.

The BK-40 series earned 4.9 out of 5 stars at Do It Best and True Value — that’s contractors voting with their wallets, not marketing fluff. Skip these if you’re doing a cheap flip or temporary signage. But for permanent address marking that’ll outlast the mortgage, zinc beats plastic every time.

Zinc Construction and Weather Resistance

The solid coated zinc material delivers genuine corrosion resistance, not the surface-level protection you get from painted steel numbers. Zinc forms its own protective patina when exposed to weather — that’s chemistry working in your favor, not against you.

The satin black finish isn’t just aesthetic. Matte finishes hide minor scratches better than glossy ones, and they don’t create hotspots of reflected sunlight that can annoy neighbors or drivers. The coating bonds to zinc better than it would to aluminum or plastic substrates.

Here’s what matters: zinc won’t rust like steel, won’t oxidize white like aluminum, and won’t become brittle like plastic in temperature swings. That’s particularly relevant when your address numbers see -30°F in January and 95°F in August.

Installation and Compatibility

Nail-on mounting works on wood, brick, metal, doors, and walls — basically every surface you’ll encounter on a Montana jobsite. The mounting nails come included, which sounds basic until you’re 40 miles from town and realize the homeowner expected you to provide hardware.

The BK-40 series includes full alphanumeric coverage (0-9, A-Z), so you can handle those rural addresses like “1234A Highway 93” without mixing and matching different product lines. Character consistency matters more than most people realize — mismatched fonts look amateur.

Installation couldn’t be simpler: position, nail, done. No pilot holes needed for wood siding or trim. Brick and masonry might need pre-drilling, but that’s true for any mounting system. The zinc material is soft enough to conform slightly to irregular surfaces but rigid enough to stay put.

Bulk Packaging for Contractors

Single units come as BK-40/4, 5-packs as BK-40/4-XCP5, and 50-packs as BK-40/4-XCP50. The 50-pack makes sense for tract builders or anyone doing multiple properties. You’re not paying retail markup on every individual number.

Smart contractors buy the 50-pack and keep common numbers in stock. Nothing kills job flow like running to town for a missing “3” or “7”. The per-unit cost drops significantly in bulk — money that stays in your pocket instead of the retailer’s.

FAQ

Q: How do these zinc numbers compare to plastic alternatives for Montana weather?

A: Zinc provides genuine corrosion resistance through its material properties, while plastic becomes brittle in cold weather and can crack from thermal cycling. Zinc numbers cost more upfront but won’t need replacement after a few freeze-thaw seasons.

Q: What surfaces can I mount these on?

A: Compatible surfaces include wood, brick, metal, doors, and walls. Mounting nails are included. Pre-drill for masonry surfaces to prevent cracking.

Q: Are these numbers visible during winter conditions?

A: At 4 inches tall, they remain readable even with moderate snow accumulation on horizontal surfaces below. The satin black finish provides contrast against light-colored siding without creating glare issues.

Q: Can I get letters for unit designations?

A: Yes. The full BK-40 series includes characters 0-9 and A-Z, allowing complete address configurations including apartment letters or rural route designations.

Q: How do contractors typically buy these?

A: Packaging options include singles (BK-40/4), 5-packs (BK-40/4-XCP5), and 50-packs (BK-40/4-XCP50). Most contractors opt for the 50-pack to maintain inventory and reduce per-unit costs.