Can blind holes be threaded?

Yes. Blind tapped holes are commonly used for concealed fasteners. Bottoming taps are ideal for maximizing thread engagement without break-through.

How deep should a blind hole be?

Typically 3–4× the hole diameter. For threaded blind holes, allow additional unthreaded space at the base.

What’s the tolerance range?

±0.05 mm for diameter and ±0.1 mm for depth is common in CNC precision machining.

What do buyers need to provide when requesting a quote?

Buyers should provide hole diameter, total depth, thread specs, CAD files (2D and STEP), material type, and quantity forecast.

Can bronze rust in coastal environments?

Bronze does not rust like iron, but marine air can accelerate patina formation due to increased moisture and salt exposure.

What causes bronze to turn green?

The green coloration on bronze comes from copper reacting with air, moisture, and carbon dioxide to form copper carbonate, also known as patina.

Is patina a sign of damage?

No. Patina is a natural and often protective layer that forms on bronze, helping shield the underlying material from further corrosion.

How can I keep bronze looking new?

To maintain a clean finish, apply wax or lacquer coatings regularly, avoid acidic or abrasive cleaners, and store or install bronze in dry, well-ventilated environments.

Is bronze or stainless steel better for outdoor fixtures?

Both are durable, but bronze offers an aging aesthetic with protective patina, while stainless steel provides a more consistent, modern appearance. The choice depends on visual goals and environmental exposure.

Can I request bronze parts with pre-applied patina or protective finishes?

Yes. YISHANG offers customizable bronze finishes, including pre-patinated and coated options based on client specifications.

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Modern Design Steel Structure Broiler Chicken Poultry Farme

We are a leading manufacturing expert in China for customizing and designing energy storage enclosures, sheet metal parts, equipment enclosures, network cabinets, composting sheds, poultry houses, large light box enclosures, and metal racks!

Name	Design Custom Steel Structure Metal Chicken Sheds Poultry House
Size	According to the drawings, samples or your requests
Material:	Aluminum, stainless steel, carbon steel
Certificate	ISO9001:2015
Drawing format	3D/CAD/DWG//STEP/PDF
Sample	Pay Sample Fee
Advantage	One-stop Solution
Quality Control	Professional Inspection
Service	OEM sheet metal Fabrication Services
Additional	Sample Order and Small Order are acceptable
Function	Junction, Distribution, Electrical, Battery, Control, Monitoring, Outdoor waterproof Enclosure Box
Transportation packaging	Can be knock-down packaging or complete packaging.

Laser-cut installation circular holes on the welded steel frame panel.

We use fixed fixtures to ensure that the circular holes cut are consistent with the dimensions on the drawing, and each frame cut is subjected to quality inspection.

Design Custom Steel Structure Metal Chicken Sheds Poultry House

Laser-cut installation circular holes on the welded steel frame panel.

We use fixed fixtures to ensure that the circular holes cut are consistent with the dimensions on the drawing, and each frame cut is subjected to quality inspection.