Where to Buy DIN7343 Coiled Spring Pin Spiral Lock Fastener Pin for Machinery Assembly?

What Is This Spiral Lock Fastener for Mechanical Projects

Mechanical procurement specialists often search for reliable positioning fasteners that can withstand continuous vibration and cyclic impact in equipment assemblies. DIN7343 Coiled Spring Pin Spiral Lock Fastener Pin is widely selected for medium-load machinery assembly, and many buyers struggle to find suppliers that can guarantee stable batch quality, flexible customization and competitive factory pricing for precision elastic pins. When sourcing reliable locking components, engineers will prioritize products manufactured following German DIN industrial standard.

This multi-layer spiral coiled pin creates uniform radial pressure once pressed into the hole. It fills gaps tightly and maintains locking force during long-time running, reducing the risk of component separation under dynamic loads. Unlike simple fasteners that only rely on partial contact, its full-circle contact design evenly distributes stress across the entire pin body. It avoids local stress concentration and greatly improves the service life of connecting parts, making it a preferred choice for dynamic mechanical connection scenarios. Many original equipment manufacturers prefer this elastic fastener because it simplifies assembly procedures and cuts down long-term equipment maintenance expenses

Available Material & Surface Treatment Options

Different working environments require different raw material grades and surface protection. For overseas industrial projects, surface treatments for DIN7343 Coiled Spring Pin Spiral Lock Fastener Pin can also comply with RoHS and other international environmental standards when required. Buyers can pick proper material according to load, humidity and corrosion conditions of their equipment.

Material Category	Exact Grade	Surface Treatment Options
Carbon Steel	65Mn,60Si2Mn	Zinc plating, black oxide, anti-rust oil
Stainless Steel	SS304,SS316	Passivation, polishing, anti-fingerprint treatment

All raw materials are inspected before production to ensure stable elasticity and hardness. You can freely combine material grade and surface finish, and we support custom coating requirements for your bulk purchase of this spiral lock fastener. Every raw material batch comes with original material certificates, our quality team will conduct hardness and tensile tests before mass production to eliminate unstable raw material. Whether you need blue white zinc, yellow zinc or matte black oxide finish, our workshop can adjust the treatment process to match your drawing or specification requirements.

Core Technical Parameters & Custom Range

Most machinery projects require different diameter and length combinations to fit various pin hole designs. DIN7343 Coiled Spring Pin Spiral Lock Fastener Pin supports standard sizes in stock, while non-standard dimensions can be produced based on drawings or samples.

Item	Specification
Standard	DIN7343
Type	Multi-layer coiled spring pin
Size Range	Dia 1.5mm–20mm, Length 4mm–100mm
Custom Service	Custom diameter, length, hardness, marking and packaging

We keep strict tolerance control on every finished part. Burr-free surface and consistent chamfer make installation smooth for automated assembly lines. During production, we use precision rolling equipment to form the multi-layer spiral structure. After forming, heat treatment is applied to obtain stable elasticity. Each finished pin will go through manual and visual inspection to remove products with scratches, cracks or uneven coil gaps. We can also add laser marking on the pin surface to print standard marks or customer logos if your project needs customized identification.

DIN7343 VS Ordinary Slotted Spring Pin Performance Comparison

Engineers often compare coiled spring pins with simple slotted spring pins before final procurement decisions. Structural differences bring obvious performance gaps under vibration and repeated assembly.

The single-slit slotted spring pin only has one opening on the side. When subjected to vibration and impact, stress will continuously concentrate at the slit position, and it is easy to expand, deform or even break after long-term cyclic load. On the contrary, the multi-layer spiral structure of coiled spring pin can absorb shock energy layer by layer. Even under continuous vibration, it can keep the interference fit between pin and hole. It can still maintain good locking performance after repeated disassembly and replacement, which reduces the maintenance frequency and downtime of the whole machine. Test results consistently prove the superior shock absorption capacity delivered, as verified for DIN7343 Coiled Spring Pin Spiral Lock Fastener Pin during equipment vibration fatigue tests.

Typical Application Industries

Mechanical positioning and anti-loosening needs exist across many manufacturing sectors. This spiral lock pin works well for components that require precise alignment and reliable locking. Common industries include agricultural machinery, conveyor systems, construction machinery, automotive spare parts, hydraulic & pneumatic equipment and automation instruments. For dry indoor assembly, carbon steel 65Mn zinc plated version is the most economical option. Stainless steel grade is recommended for outdoor, salty and humid working environments.

In agricultural machinery, it is widely used for the connection of rotating and swinging parts on harvesters and tillers. In construction machinery, it serves for hydraulic cylinder positioning and walking assembly connection. For automated equipment and precision instruments, small-size coiled pins are used for precise positioning of transmission components. No matter static positioning or dynamic vibration connection, this product can provide stable connection performance. Our technical team will recommend the right specification of DIN7343 Coiled Spring Pin Spiral Lock Fastener Pin once you share detailed application conditions.

Packaging, Inspection & Shipment Solution

Proper packaging is critical to protect precision pins during long-distance sea and land transport. All products will go through sorting, inspection and professional export packing before delivery.

Finished pins are sorted by size and packed separately in thick waterproof poly bags. Desiccants are added inside each bag to prevent rust. Sealed plastic bags are placed into reinforced export cartons, with buffer materials to avoid collision damage. Cartons will be stacked neatly on wooden pallets and wrapped with stretch film. Custom shipping marks, batch labels and private stickers can be printed as requested. Our QC team will check quantity and appearance before loading. Ningbo Gangtong Zheli Fasteners arranges stable packing and on-time delivery for global orders.

We follow complete pre-shipment inspection workflow. After production, workers sort products strictly by size specification to avoid mixed sizes. QC inspects surface quality, dimension tolerance and hardness by random sampling. For large bulk orders, we will carry out full sampling inspection. The wooden pallets we use meet export fumigation requirements, which can smoothly pass customs inspection of most countries, ensuring safe global transit of DIN7343 Coiled Spring Pin Spiral Lock Fastener Pin.

Why Choose Ningbo Gangtong Zheli Fasteners

Selecting a trustworthy factory supplier helps buyers reduce procurement risks and stabilize supply chain for long-term machinery manufacturing projects. Ningbo Gangtong Zheli Fasteners owns complete production lines and full inspection processes for standard and custom fasteners. We carry out raw material testing, heat treatment monitoring and finished mechanical performance inspection for every batch. Whether small sample trial order or large tonnage wholesale, we offer stable product quality and direct factory price.

Our technical team has rich experience in fastener application. When customers send over working condition parameters or assembly drawings, we can quickly evaluate whether the selected specification and material can meet the load and anti-vibration requirements, and provide optimization suggestions if necessary. We support sample delivery before mass order, so buyers can test product performance in their own workshop before placing bulk purchase. Customers sourcing DIN7343 Coiled Spring Pin Spiral Lock Fastener Pin regard our professional technical support and reliable after-sales service as core advantages.

FAQ

Q1: Can I get custom sizes for this spiral lock fastener pin?

A1: Yes. We produce both standard DIN7343 sizes and non-custom dimensions according to your technical drawings or samples. We can adjust diameter, length and coil thickness to match your special assembly hole design. Customized dimensions are widely adopted in non-standard mechanical equipment, and our production line is flexible to handle small and large custom orders for DIN7343 Coiled Spring Pin Spiral Lock Fastener Pin.

Q2: What material grades can be supplied?

A2: Carbon steel 65Mn,60Si2Mn and stainless steel SS304,SS316 are available. Zinc plated carbon steel is the most cost-effective choice for most machinery assembly projects. Each material option has distinct mechanical features, and our engineers can compare corrosion resistance, tensile strength and cost for you to pick the most suitable material grade according to your working environment when selecting DIN7343 Coiled Spring Pin Spiral Lock Fastener Pin.

Q3: Can you provide material test certificates?

A3: Yes. MTC and factory inspection reports can be supplied to support quality audit and customs clearance for your shipments. All certificates can be issued in English version to meet international trade requirements. These official documents are essential for quality control archives and customs clearance, and we will prepare and send them together with shipment documents for DIN7343 Coiled Spring Pin Spiral Lock Fastener Pin.

Q4: Is custom packaging and marking available?

A4: Yes, we support customized labels, shipping marks and outer box printing to meet your branding requirements. You can send your label design files, and we can print and paste labels on plastic bags or cartons. Branded packaging helps simplify your warehouse management and resale arrangement once you receive shipments of DIN7343 Coiled Spring Pin Spiral Lock Fastener Pin.