A container of fasteners usually reaches its weight limit long before it is full, and that single fact drives the whole loading plan. This guide explains payload limits, palletised versus loose loading, and how mixed fastener orders are packed and marked for easy receiving.
The drill point decides whether a self-drilling screw cuts cleanly or burns out on the steel. This guide explains drill point numbers from #1 to #5, the steel thickness each one handles, and how to match point, thread and washer to roofing and purlin applications.
Fasteners are heavy and sharp, so packing decides whether your shipment arrives clean, countable and easy to resell. This guide compares bulk cartons, small retail boxes, bags and pallet options, and explains what to confirm about weight limits and labelling before ordering.
DIN, ISO and ASTM fasteners can look identical and still differ in dimensions, tolerances or testing. This guide explains what each standard system defines, why “equivalent” fasteners are not always interchangeable, and how to specify standards clearly when ordering from China.
Bolt head markings tell you the strength class at a glance. This guide explains what 4.8, 8.8, 10.9 and 12.9 mean for carbon steel bolts, how stainless A2 and A4 grades differ, and why the marking must match your drawing and material certificate.
OEM fastener production starts with drawing review and feasibility check. The factory confirms material, tooling, surface treatment and inspection criteria. After sample approval, mass production, quality inspection, packing and export loading are arranged.
Importers should confirm factory identity, material grade, product standard, drawing tolerance, coating, packing method, sample approval and inspection records. A clear specification reduces misunderstanding and helps the factory plan production accurately.
Zinc plated fasteners are widely used for indoor and light duty applications. Hot dip galvanized fasteners provide heavier coating for outdoor and structural environments. The best choice depends on corrosion exposure, assembly tolerance, appearance requirement and budget.
Roofing screws must match the base material, panel thickness, washer type and corrosion environment. For steel purlins, self drilling screws with the right drill point reduce installation time. For timber purlins, sharp point screws and bonded washers are common. Buyers should confirm coating, salt spray requirement, washer diameter and packing before ordering.