1. Spring washer anti-loosening: The material of the spring washer is spring steel. After assembly, the washer is flattened. Its rebound force can maintain the compression force and friction between the threads, thereby achieving anti-loosening. 2. Anti-loosening of the jacking nut: The jacking effect of the nut is used to cause the bolt to receive additional tension and additional friction. 3. Self-locking nut to prevent loosening: One end of the nut is made into a non-circular closing or a radial closing after opening. When the nut is tightened, the closing opening expands, and the elastic force of the closing opening is used to compress the screwed threads. This kind of anti-loosening structure is simple, reliable and can be disassembled and assembled multiple times without reducing the anti-loosening performance.

It consists of a group of single nails and connecting pieces of the same shape arranged at equal distances. The connecting piece can be copper-plated iron wire. The connecting piece is connected to each nail in the direction of β angle with the center line of each nail rod, and the nails are connected in series. Join together and roll into a roll.

Flat washers are typically thin pieces of various shapes used to reduce friction, prevent leaks, isolate, prevent loosening, or distribute pressure.

Fastener Fair Mexico 2023 has started! We will provide you with the best quality fastener series products, bolts, nuts and screws here from Thursday to Saturday. Qingdao Vanku Industury Group booth number is 500.Welcome to inquire!

Expo Nacional Ferretera 2023, exhibition time: September 07-09, 2023, exhibition location: Mexico-Guadalajara-Av Mariano Otero 1499, Verde Valle, 44550 Guadalajara, Jal .,-Guadalajara Convention and Exhibition Center, sponsor: Mexican government, Reed Exhibitions, holding period: once a year, exhibition area: 42,554 square meters, exhibitors: 52,410 people, the number of exhibitors and participating brands reached 921 .

The combined bolt refers to a three-component assembly that is fastened together by an outer hexagonal bolt, a spring washer and a flat washer. Combination bolts are also called outer hexagon combination screws, also known as hexagon combination bolts.

Holding time：2023.9.7-2023.9.9 Venue: Mexico City, Mexico Products on display: All kinds of industrial fasteners, construction fasteners, assembly and installation systems, fastener production technology, warehousing, distribution, factory equipment, information, communication and services, etc.

The guardrail bolt is an important part of connecting the guardrail and the bracket, and is also a key part to ensure the stability and safety of the guardrail.