TOP 10 ISO 8750 Coiled Spring Pins Manufacturer in China(in No Particular Order)

ISO 8750 coiled spring pins are used in mechanical assemblies that require component positioning, fastening, and resistance to movement under operating loads. Their multi-layer coiled structure allows the pin to compress during installation and exert radial pressure against the mounting hole. This design helps retain the pin while transferring shear loads between connected components.

For machinery manufacturers, automotive component suppliers, industrial equipment producers, and fastener distributors, selecting an ISO 8750 supplier involves more than checking diameter and length. Material grade, dimensional tolerances, mechanical properties, hole fit, surface condition, and batch inspection records all affect the pin's performance after installation.

China has a range of fastener suppliers offering coiled spring pins and customized metal components. This article introduces ten companies for sourcing consideration and outlines the technical details and supplier capabilities worth evaluating before placing bulk orders.

Contents

1. Top 10 ISO 8750 Coiled Spring Pins Manufacturers and Suppliers in China
2. Anhui Pins Metal Products Co., Ltd.
3. Shanghai Sea Song Co., Ltd.
4. Wenzhou Wujing Fastener Co., Ltd.
5. Wenzhou Xionglian Hardware Machinery Co., Ltd.
6. Wuxi Ingks Metal Parts Co., Ltd.
7. Fasto Industrial Co., Ltd.
8. Ningbo Anbor Hardware Co., Ltd.
9. Jiaxing Yheng Group Limited
10. Shenzhen Huaxianglian Hardware Co., Ltd.
11. Hebei Chuangke Fastener Manufacturing Co., Ltd.
12. What Is an ISO 8750 Coiled Spring Pin?
13. How to Verify ISO 8750 Compliance and Product Consistency?
14. Which Materials and Surface Finishes Are Available?
15. What Information Is Required for a Coiled Spring Pin Quotation?
16. What Quality Checks Are Required Before Bulk Production?

Top 10 ISO 8750 Coiled Spring Pins Manufacturers and Suppliers in China

Anhui Pins Metal Products Co., Ltd.

Anhui Pins Metal Products Co., Ltd. is based in Quanjiao County, Chuzhou, Anhui Province. The company began its business in Jiaxing, Zhejiang, in 2017 and relocated to Anhui in 2021. Its product range includes slotted spring pins, coiled spring pins, solid dowel pins, retaining rings, compression limiters, washers, trim clips, and customized metal stamping components.

For metal fastening projects, PINES coordinates production with specialist partner factories and manages requirements across precision stamping, CNC machining, heat treatment, and surface finishing. This arrangement supports projects involving different component structures and processing requirements without representing partner-factory equipment as company-owned production capacity.

Customization and order support include:

• Drawing and specification review: Check nominal dimensions, tolerances, material requirements, and assembly conditions before sampling.
• Material and process coordination: Match steel or stainless steel options with the required mechanical properties and operating environment.
• Sample development: Coordinate sample production for dimensional and installation checks before bulk orders.
• Quality supervision: Arrange dimensional, visual, and mechanical inspections according to agreed specifications.
• Order coordination: Confirm product specifications, packaging requirements, and delivery arrangements for customized and repeat orders.

For ISO 8750 coiled spring pin projects, PINES can review standard dimensions and customer drawings, coordinate material and surface requirements, and support OEM orders for machinery manufacturers, component suppliers, and industrial distributors.

Shanghai Sea Song Co., Ltd.

Shanghai Sea Song Co., Ltd. lists coiled pins under ISO 8750 and DIN 7343. Its product information includes carbon steel, stainless steel, alloy steel, brass, and bronze options, along with finishes such as black oxide, zinc plating, Dacromet, and plain finish. Customized dimensions and packaging are also listed.

Wenzhou Wujing Fastener Co., Ltd.

Wenzhou Wujing Fastener Co., Ltd. offers ISO 8750 / DIN 7343 coiled roll pins. Its listed product range includes diameters from 1.5 mm to 16 mm and materials such as 65Mn, C67S, C75S, 304, and 316 stainless steel. Drawing-based customization and specific material requirements can be discussed.

Wenzhou Xionglian Hardware Machinery Co., Ltd.

Wenzhou Xionglian Hardware Machinery Co., Ltd. supplies spring pins and related hardware products. Its product information references ISO 8750 and other spring-pin standards, making it a potential supplier to contact for standard-duty coiled pin requirements.

Wuxi Ingks Metal Parts Co., Ltd.

Wuxi Ingks Metal Parts Co., Ltd. appears in supplier listings for coiled spring pins and other metal components. Its current ISO 8750 size range, material specifications, production details, and inspection documents should be confirmed before a purchase decision.

Fasto Industrial Co., Ltd.

Fasto Industrial Co., Ltd. supplies industrial fastening products for different mechanical applications. Its current ISO 8750 standard-duty product range and availability of drawing-based customization should be confirmed for specific projects.

Ningbo Anbor Hardware Co., Ltd.

Ningbo Anbor Hardware Co., Ltd. is a hardware supplier to consider when comparing metal fastening components from Zhejiang. Available diameters, material grades, surface conditions, and production or sourcing arrangements should be checked before ordering ISO 8750 pins.

Jiaxing Yheng Group Limited

Jiaxing Yheng Group Limited appears in Chinese industrial fastener supplier listings. Product drawings, dimensional specifications, and documentation confirming ISO 8750 compliance should be requested for the required pin sizes.

Shenzhen Huaxianglian Hardware Co., Ltd.

Shenzhen Huaxianglian Hardware Co., Ltd. is listed among suppliers of hardware and fastening components. Its ability to provide standard-duty coiled spring pins, specified material options, and batch inspection records should be confirmed.

Hebei Chuangke Fastener Manufacturing Co., Ltd.

Hebei Chuangke Fastener Manufacturing Co., Ltd. is a fastener supplier that may be considered for comparative sourcing. Its current coiled spring pin product availability and compliance with ISO 8750 dimensional and mechanical requirements should be verified.

What Is an ISO 8750 Coiled Spring Pin?

ISO 8750 specifies standard-duty coiled spring-type straight pins made from steel, austenitic stainless steel, or martensitic stainless steel. The standard covers nominal diameters from 0.8 mm to 20 mm. It is distinct from ISO 8748 for heavy-duty coiled spring pins and ISO 8751 for light-duty coiled spring pins.

A coiled spring pin is formed by rolling a strip of spring material into a cylindrical shape with multiple overlapping layers. Unlike a slotted spring pin, it does not have one longitudinal opening. When pressed into a mounting hole, the coiled layers compress and generate outward radial force against the hole wall.

This construction provides several functional characteristics:

• Radial retention: Elastic compression creates contact pressure between the pin and the mounting hole.
• Shear load transfer: The pin connects components and transfers loads across the joint's shear planes.
• Vibration accommodation: The coiled structure can help maintain contact with the hole wall under repeated movement.
• Guided installation: Chamfered ends help guide the pin into the hole and reduce edge catching.

Actual performance depends on pin dimensions, material, hole tolerance, engagement length, installation method, and joint design.

Specifications

How to Verify ISO 8750 Compliance and Product Consistency?

A product described as a coiled spring pin is not automatically compliant with ISO 8750. The standard designation, dimensional requirements, and mechanical properties should be checked against the supplied product.

Important verification items include:

• Standard identification: Confirm that the product is standard duty under ISO 8750, not heavy duty ISO 8748 or light duty ISO 8751.
• Dimensional inspection: Check nominal diameter, outside diameter, length, and applicable tolerances.
• Material documentation: Verify the steel or stainless steel grade used for production.
• Mechanical test results: Request applicable double shear strength data when required by the project.
• Sample verification: Compare samples with the approved drawing and test them in the actual mounting hole.
• Batch records: Establish inspection frequency, batch identification, and acceptance criteria for repeat orders.

For ongoing supply, the approved drawing and inspection requirements should remain the reference for subsequent production batches. Any changes to material or manufacturing processes should be reviewed before implementation.

Which Materials and Surface Finishes Are Available?

ISO 8750 covers steel, austenitic stainless steel, and martensitic stainless steel. Material selection should reflect the mechanical load, corrosion exposure, and operating environment.

The standard surface condition for this product is plain or natural finish with protective lubricant. Other surface treatments may be discussed according to the application:

Plain or natural finish: Used when the natural surface condition and protective lubricant meet storage and assembly requirements.

Oiled finish: Requires agreement on lubricant condition and packaging.

Black oxide: Selected when a black surface finish is required.

Zinc plating: May be considered when additional corrosion protection is needed.

Other coatings: Require confirmation of compatibility with the pin material and application environment.

Electroplating spring steel requires particular attention because hydrogen introduced during the process can cause embrittlement in susceptible materials. Coating methods and any necessary post-plating treatment should be discussed before the specification is approved.

What Information Is Required for a Coiled Spring Pin Quotation?

A complete request for quotation helps suppliers assess technical requirements and prepare comparable pricing. Missing details may lead to differences in material selection, dimensions, surface treatment, or inspection scope.

For non-standard dimensions or special assembly structures, include a technical drawing. An existing sample or component can also help clarify the required fit and installation conditions.

What Quality Checks Are Required Before Bulk Production?

Bulk production requires more than an initial sample that fits the mounting hole. Dimensional and material consistency must be maintained across the order, especially when pins are used in automated assembly or repeated mechanical connections.

Key quality checks include:

• Dimensional inspection: Measure diameter, length, and other drawing-defined features.
• Visual inspection: Check for cracks, burrs, damaged edges, uneven winding, and surface defects.
• Material verification: Confirm the specified material grade through relevant material records.
• Mechanical testing: Verify required mechanical properties, including double shear strength when specified.
• Installation testing: Check sample fit and insertion behaviour in the actual mating hole.
• Packaging inspection: Confirm quantity, labels, batch identification, and protection against damage during transport.

The inspection plan should define the test method, sampling frequency, acceptance criteria, and documentation required for each batch. These details help maintain consistent product requirements across repeat orders.