2. Product Features
1. High precision and accurate positioning
Using five-axis linkage CNC machining technology, the pin diameter accuracy is controlled at ±0.002mm, the cylindrical error is ≤0.001mm, and the surface roughness is Ra≤0.4μm. Perfectly matched with the positioning hole and the support surface, it ensures zero deviation of the position of the parts during assembly, effectively improving the overall accuracy and stability of the equipment.
2. Strong corrosion resistance and wide application
304 stainless steel has good anti-rust performance and is suitable for general industrial environments; 316L stainless steel has outstanding acid and alkali resistance and seawater corrosion resistance due to the addition of molybdenum elements. It can work stably in humid and corrosive harsh working conditions, and its service life is more than 10 years.
3. High strength, stable and durable
After solution treatment and cold hardening process, the stainless steel positioning pin/support pin has a tensile strength of more than 700MPa and a hardness of HV200-250. It can withstand large shear force and pressure, and is not easy to deform or break under high load and strong vibration environment, ensuring long-term stable operation of the equipment.
4. Various specifications, flexible customization

We provide various types of pins, such as cylindrical pins, conical pins, and threaded pins, with diameters ranging from 1mm to 50mm and lengths from 5mm to 200mm. We support customization of special sizes, head shapes, and surface treatment processes to meet the personalized needs of different industries and equipment. Some common specifications are as follows:

Type	Material	Diameter (mm)	Length (mm)	Main application scenarios
Cylindrical locating pin	304 stainless steel	3 - 20	10 - 100	Automation equipment parts positioning
Tapered support pin	316L stainless steel	6 - 30	20 - 150	Mold support and alignment
Threaded pin	304 stainless steel	8 - 40	30 - 200	Removable parts connection

III. Product Details
1. Material Type
304 stainless steel: Excellent comprehensive performance, good corrosion resistance, mechanical strength and processing performance, widely used in positioning and supporting scenarios of electronic equipment and general industrial machinery.
316L stainless steel: Improved corrosion resistance on the basis of 304, especially strong resistance to chlorides, seawater and other media, suitable for food processing, marine engineering, medical equipment and other fields with extremely high requirements for hygiene and corrosion resistance.
2. Manufacturing Process
CNC machining: Through turning, grinding, milling and other processes, the size and shape of the pin body are accurately controlled to ensure high-precision machining.
Surface treatment: Polishing, passivation, electrolytic grinding and other processes are used to further improve the surface finish and rust resistance; some products can be hard chrome plated to enhance wear resistance.
Special processing: For positioning pins/support pins with special structures such as threads and steps, CNC lathes and special tools are used for fine processing to meet complex design requirements.
3. Quality inspection
Dimension inspection: Use precision instruments such as coordinate measuring machines and micrometers to fully inspect key dimensions such as pin diameter, length, and taper to ensure that they meet tolerance requirements.
Performance inspection: Verify material strength through hardness testing and tensile testing; conduct salt spray testing (corrosion resistance time ≥ 96 hours) on 316L stainless steel products to evaluate their corrosion resistance.
Appearance inspection: Use optical inspection instruments to check the surface of the pin to ensure that there are no defects such as scratches, cracks, and sand holes to ensure product quality.