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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Custom Power Distribution Panel Electric Control Cabinet

The network cabinet is used to combine and install panels, plug-ins,sub-boxes, electronic components, devices, and mechanical parts andcomponents to form a network cabinet.Simple structure, convenient operation, and installation, exquisiteworkmanship, precise size, economical and practical;.Internationally popular white tempered glass front door;.

Upper frame with circular ventilation holes;.Casters and supporting feet can be installed at the same time,.Left and right side doors and front and rear doors that can be easilyremoved;A full range of optional accessories.

Product No.	YS-2100236
Usage	Telecommunication network equipment system.
Material	0.8 mm -1.0 mm thickness of stainless steel. (For iron material: 1.0mm – 1.2mm thickness, because it is softer than stainless steel ) 1) 201 stainless steel: suitable for indoor use. 2) 304 stainless steel: suitable for outdoor or humid place use. 3) 316 stainless steel: suitable for a coastal place or acidic environment.
Size	1) Custom size. 2) 6604501670mm
Surface Treatment	1) 2B surface: conducive to water release and the surface is durable. 2) Polished surface: conducive to water release too, but easy to be scratched. 3) Brushed surface: water is easy to accumulate into the brushed gaps, not durable.
Features	1) The stainless steel electrical cabinet is waterproof and durable for outdoor. 2) Active shelves for the electrical cabinet, matching different devices according to actual needs.
Logo	Silk printing logo and other contents. Why not use laser marking or etching? Because laser marking and etching can damage the stainless steel surface. And after a long time, the rain and air will corrode the stainless steel.
Packaging	1) Plastic bag + foam + KAA carton. 2) One unit of the metal electrical box one carton. 3) Can be knock-down packaging or complete packaging.
Sample	Welcome to order a metal electrical cabinet sample or customize your sample to inspect the quality.

Polishing:
The surface is smooth enough,no shadows, no holes, no gaps, no seams.The inner and outer corners are in accordance withthe drawing standards.
The straight side is straight enough, no holes,no gaps (width not exceeding 20mm)

Electric Control Cabinet Cooling tray:
This metal shell laminate is equipped with a heatdissipation and ventilation tray to enhance theheat dissipation funetion inside the box.

Installation method:
Use #304 stainless steelscrews to fix and install on the left and rightsides of the metal frame.

Visualized door panel:
The door panel is equipped with a visible toughenedglass window, and the operator can view the insideof the cabinet aceording to the window, and thewindow size can be customized as required.
The front and rear door panels are equipped withbounee locks.

Removable side panels:
Phillips screws are used for installation to keep thenetwork eabinet beautiful and simple.Bottom.
Use universal casters, with or without brake.Customers only need to provide the load-bearingdata of the network cabinet and we will configuresuitable casters for you.