リベット・ブラインドリベット完全ガイド：種類、設置、薄い金属板の接合用途

Rivet Types: Solid, Blind, and Structural

Rivets are permanent fasteners that join sheet materials by deforming the rivet shank to create a second head (shop head) on the blind side. Unlike bolts and screws, rivets require access to only one side of the joint — making them ideal for joining sheet metal, panels, and enclosures. The main types: Solid rivets (扁冲铆钉) — traditional solid steel/aluminum rivets requiring access to both sides for bucking; Pop rivets (blind rivets) — hollow rivets installed from one side using a rivet gun; Structural rivets — high-strength rivets for critical load-bearing connections (aircraft, bridges, cranes); Rivet nuts / threaded inserts — convert thin sheet into threaded accepting structure.

Pop Rivets (Blind Rivets): The Workhorse

Pop rivets (named after the Pop® brand) are the most widely used blind rivet in African construction and manufacturing. They consist of a hollow rivet body and a mandrel; pulling the mandrel expands the rivet body against the hole walls. Installation requires access to only one side — the rivet 'pops' when the mandrel breaks. Key types: Open-end (standard) — for general purpose sheet metal joining; Closed-end — provides watertight seal, for outdoor enclosures and HVAC; Multi-grip — one rivet fits multiple grip ranges, reduces inventory; Structural — high-shear strength for load-bearing applications.

Rivet Material and Coating Selection

Rivet material must be compatible with the sheet materials and environment: Aluminum rivets (most common) — lightweight, corrosion-resistant, suitable for aluminum and steel sheets; use with aluminum or steel sheets. Steel rivets — stronger than aluminum, use in steel structures where galvanic corrosion is not a concern; hot-dip galvanized for outdoor use. Stainless steel rivets — maximum corrosion resistance for marine environments, food processing, chemical plants. For African coastal applications (Mombasa, Lagos, Durban), always use stainless steel 316 pop rivets with stainless steel sheets or matched aluminum with closed-end aluminum rivets.

Rivet Nuts (Threaded Inserts): Adding Threads to Sheet Metal

Rivet nuts (also called threaded inserts or nut inserts) solve the problem of creating a strong threaded attachment point in thin sheet metal. Installation: insert the rivet nut into a drilled hole from one side; use a specialized tool to compress (spin) the nut, forming a flange on the blind side. The result is a female thread in the sheet — M3 to M12 or #6-1/2" threads are common sizes. Rivet nuts are widely used in: Electrical enclosures and switchboards; HVAC equipment and air handling units; Automotive and commercial vehicle body building; Solar inverter and controller mounting.

Installation: Pop Rivet Gun Types

The right rivet gun makes installation faster and more reliable: Hand riveter (lever type) — most common for general use; 5-10 rivets per minute; sufficient for M3-M6 rivets. Ratchet riveter — spring-loaded, faster operation for production work. Pneumatic riveter — air-powered, 20-30 rivets per minute; essential for production assembly. Hydraulic riveter — for large rivet nuts (M10-M12) and heavy structural rivets. For African workshops, a quality lever-action hand riveter is the best starting point; upgrade to pneumatic for high-volume production.

Frequently Asked Questions