For samples, the lead time is about 7 days. For mass production, the lead time is 20-30 days after receiving the deposit payment. The lead times become effective when (1) we have
received your deposit, and (2) we have your final approval for your products. If our lead times do not work with your deadline, please go over your requirements with your sale. In all
cases we will try to accommodate your needs. In most cases we are able to do so.
Finish
ZINC PLATED
Measurement system
Metric
Application
Heavy Industry, Retail Industry, General Industry
Place of Origin
China Hebei
Standard
DIN ASTM BSW GB
Product name
Rivet Nut
Material
Carbon Steel , Stainless Steel
manner of packing
Carton or according to customer requirements
port of shipment
Tianjin Port
Standard
GB, DIN, ISO, JIS
Size
M3-M50 or non-standard as request&design
Material
Carbon steel, stainless steel, alloys steel etc.
Grade
4.8 / 6.8 / 8.8 / 10.9 / 12.9 ,
A2-70 / A4-80
Packing
Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
color
black/natural
size
M16-M30
material
carbon steel
name
Large hexagon bolt
type
Fastener
grade
10.9S, 12.9
port
Tianjin
sample
Support
application
Heavy Industry, Mining, Water Treatment, Healthcare, Retail Industry, General Industry, Oil & Gas, Automotive Industry
customized
Support
Standard
GB, DIN, ISO, JIS
Size
M3-M50 or non-standard as request&design
Material
Carbon steel, stainless steel, alloys steel etc.
Hex head bolt and nut Grade
4.8 / 6.8 / 8.8 / 10.9 / 12.9 ,
A2-70 / A4-80
Packing
Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
Standard
GB, DIN, ISO, JIS
Size
M3-M50 or non-standard as request&design
Material
Carbon steel, stainless steel, alloys steel etc.
Hex head bolt and nut Grade
4.8 / 6.8 / 8.8 / 10.9 / 12.9 ,
A2-70 / A4-80
Packing
Box, carton or plastic bags, then put on pallets, or according to the demand of the customers
Standard Solid Wheels, Tire Style Wheels, caster wheels
Material Nylon, PP, PVC
Place of Origin Handan, China
Customized support OEM, ODM
Material:Nylon/PVC/PU/carbon steel/stainless steel
Product name Caster Wheels
Usage Wide Usage
Packaging and delivery
Packaging Details caster wheels,all goods simple pack in the carton with poly bag or as customer’s request
A double-stacked self-locking washer is a special mechanical connector designed to prevent bolts from loosening, especially in high-vibration or high-load environments.It consists of two spring washers nested inside each other in an S-shaped configuration. The outer spring washer has ends that bend inwards, while the inner spring washer has ends that bend outwards, creating a two-way self-locking feature.The working principle of this washer is based on elastic deformation. When placed between connecting parts, the inner curved part of the outer spring ring interlocks with the outer curved part of the inner spring ring, creating a locking force that prevents the connecting parts from loosening under vibration or load.The advantages of the double-stacked self-locking washer include high reliability, easy installation, and a wide range of applications.It is suitable for various mechanical connections, such as threaded connections and pin connections, and is widely used in industrial production and machinery manufacturing, especially in the automotive manufacturing process, where it is often used to connect engine and chassis systems to improve the safety and reliability of the car.