Hollow rivets, also known as semi-tubular rivets, are fasteners with a partially hollow shank, requiring less force to install compared to solid rivets. They are used for joining materials where a permanent, yet relatively low-force connection is needed. Key specifications include material (e.g., aluminum, steel, stainless steel), head style (e.g., flat, oval, pan, truss), diameter, length, and grip range.

A round bush's specifications include its dimensions (inner diameter, outer diameter, height/length), material (plastic, brass, mild steel, stainless steel, etc.), hardness, temperature range, load capacity, and surface finish. These details vary greatly depending on the bush's intended application, such as for electronics, machinery, furniture, or hydraulic systems

Here are some key specifications for M4 to M14 weld screws: Dimensions and Thread Pitch- M4: 0.7 mm thread pitch, 8 mm head diameter, 2.4 mm head height - M5: 0.8 mm thread pitch (standard), available in various lengths - M6: 1 mm thread pitch, commonly used in general industry applications - M8: 1 or 1.25 mm thread pitch, often used in heavy industry and construction - M10: 1 or 1.5 mm thread pitch, frequently used in automotive and machinery applications - M12: 1.25 or 1.75 mm thread pitch, commonly used in heavy machinery and construction - M14: 1.5 mm thread pitch, major diameter of 13.85-14 mm, pitch diameter of 12.936-13.026 mm Materials and Finishes- Carbon Steel: A common material for weld screws, offering strength and durability - Stainless Steel: Resistant to corrosion, often used in applications where exposure to moisture or chemicals is a concern - Finishes: Zinc plating, black oxide, galvanizing, passivation, nickel plating, and cadmium plating are some common surface treatments Standards and Certifications- DIN 929: A standard for hex weld nuts, which may be relevant for some weld screw applications - ISO 1580: A standard for pan head screws, which could be applicable to certain weld screw designs - ISO 9001, ISO 14001, IATF 16949: Quality management and environmental management certifications for manufacturers Applications- Heavy Industry: Weld screws are often used in construction, machinery, and equipment manufacturing - General Industry: They are also used in various general industrial applications, such as furniture making and appliance manufacturing - Automotive Industry: Weld screws are used in vehicle manufacturing and repair Pricing and Availability- Prices: Vary depending on the manufacturer, material, and quantity, ranging from $0.01 to $0.05 per piece or more - Lead Time: Typically 15-25 days for standard orders, but can vary depending on the manufacturer and customization requirements