TOP 10 ISO 13337 Slotted Spring Pins Manufacturer in China(in No Particular Order)

Ranking is not in a particular order.

ISO 13337 slotted spring pins are light-duty mechanical fasteners used to connect, locate, and retain components in mechanical assemblies. Their cylindrical bodies feature a longitudinal slot that allows the pin to compress during installation. Once inserted into a correctly sized hole, the pin expands and creates radial pressure against the hole wall.

For industrial buyers, selecting an ISO 13337 slotted spring pin involves more than confirming its nominal diameter and length. Material grade, dimensional tolerances, hole fit, surface condition, mechanical properties, and inspection requirements all influence the pin's performance in the final assembly.

China has a broad supply base for spring pins and precision fastening components. The following list introduces 10 companies with relevant products or manufacturing capabilities. Buyers should verify each supplier's current product specifications and production scope before placing an order.

TOP 10 ISO 13337 Slotted Spring Pins Manufacturer in China(in no particular order)

Company	Main Product Focus
Anhui Pins Metal Products Co., Ltd. (PINES)	Slotted spring pins, coiled spring pins, dowel pins, and custom metal components
Shanghai Yihai Industrial Co., Ltd.	Slotted pins, dowel pins, and retaining rings
Shanghai Sea Song Co., Ltd.	Spring pins, slotted pins, circlips, and washers
Wenzhou Xionglian Hardware Machinery Co., Ltd.	Spring pins, stamping parts, and special fasteners
PINTECH Machinery (Shaoxing) Co., Ltd.	Spring pins and precision pin products
WENQI	Slotted, straight, and coiled spring pins
Hebei Yida Changsheng Fastener Manufacturing Co., Ltd.	Slotted spring pins and industrial fasteners
China Loong Fastener Co., Ltd.	Spring pins and industrial fastening products
Oriental Industry Co., Ltd.	Spring pins, retaining rings, and washers
SPIROL China	Slotted spring pins and coiled spring pins

Anhui Pins Metal Products Co., Ltd. (PINES) specializes in precision metal pins, fastening components, and customized metal parts for industrial and mechanical assemblies. Its product range includes slotted spring pins, coiled spring pins, solid dowel pins, retaining rings, compression limiters, washers, trim clips, and custom metal stamping components.

Manufacturing and Processing Capabilities

PINES coordinates production with specialist partner factories and works with different metal processing methods according to product structure and technical requirements. Its manufacturing-related processes include precision stamping, CNC machining, heat treatment, and surface finishing. These processes support the production of components with different geometries, material requirements, and dimensional specifications.

Mold design and manufacturing

CNC machining

Surface treatment

Rigorous quality control

OEM and Customization Services

For projects requiring non-standard dimensions or specific assembly conditions, buyers can provide engineering drawings, physical samples, or technical specifications. PINES can coordinate product development and manufacturing according to the submitted requirements, including:

Drawing and Specification Review: Evaluate dimensions, tolerances, component structure, and technical requirements before production.

Material Selection: Discuss steel, stainless steel, and other material options according to application conditions.
Process Coordination: Arrange suitable machining, stamping, heat treatment, and surface finishing processes.
Sample Development: Coordinate samples for dimensional checks and assembly testing before bulk production.
Quality Supervision: Follow agreed product specifications and inspection requirements during production.
Order Coordination: Discuss production schedules, packaging specifications, and delivery arrangements for bulk orders.

ISO 13337 Slotted Spring Pin Supply

PINES supports sourcing and customization discussions for light-duty slotted spring pins according to DIN EN ISO 13337:2009. The supplied specifications cover diameters from 2 mm to 50 mm, with steel, austenitic stainless steel, and martensitic stainless steel options.

Buyers can confirm pin dimensions, length tolerances, hole requirements, surface condition, and shear strength testing requirements according to their applications. For drawing-based projects, the company can also coordinate discussions about material alternatives and non-standard product requirements.

With its product range and coordinated manufacturing resources, PINES provides a sourcing and customization option for machinery manufacturers, industrial distributors, importers, and OEM buyers requiring standard or drawing-based metal components.

Shanghai Yihai Industrial Co., Ltd. supplies dowel pins, slotted pins, retaining rings, and other fastening components. Its product range includes components associated with ISO 13337, ISO 8752, DIN 6325, and ISO 2338 standards.

Shanghai Sea Song Co., Ltd. supplies spring pins, slotted pins, retaining rings, circlips, and washers. Its product listings include ISO 13337 / DIN 7346 slotted spring pins in carbon steel and stainless steel options.

Wenzhou Xionglian Hardware Machinery Co., Ltd. focuses on fasteners, stamping parts, and special fastening components. Its spring pin range includes slotted spring pins, slotted tooth spring pins, and other mechanical fastening products.

PINTECH Machinery (Shaoxing) Co., Ltd. supplies spring pins, dowel pins, and other precision pin products. Its product range includes slotted and coiled spring pin designs for different mechanical assembly requirements.

WENQI offers spring pins in straight, coiled, and slotted configurations. Its listed material options include stainless steel, brass, and carbon steel for different fastening applications.

Hebei Yida Changsheng Fastener Manufacturing Co., Ltd. is based in Handan, Hebei, and supplies slotted spring pins and other industrial fasteners. Its product information identifies machinery, automotive, furniture, and construction as potential application areas.

China Loong Fastener Co., Ltd. supplies a range of industrial fastening products, including spring pins and slotted roll pins. Its catalog covers different fastener types and material options for industrial purchasing requirements.

Oriental Industry Co., Ltd. lists spring pins alongside retaining rings, circlips, snap rings, and disc spring washers. Its product range serves buyers sourcing fastening and retention components for machinery and industrial equipment.

SPIROL supplies slotted spring pins and coiled spring pins through its China operation. Its product range covers different spring pin structures, allowing buyers to compare slotted and coiled designs according to assembly requirements.

An ISO 13337 slotted spring pin is a light-duty spring-type straight pin with a cylindrical body and a longitudinal slot. The slot allows the pin to compress radially when it enters a hole.

During installation, the pin diameter decreases temporarily under pressure. After insertion, the pin expands against the hole wall and creates radial contact pressure. This contact helps retain the pin and connect the assembled components.

Compared with a solid dowel pin, a slotted spring pin uses its elastic structure to maintain contact with the mating hole. Its selection therefore depends on the hole dimensions, pin material, assembly loads, and installation conditions.

Item	Specification
Standard	DIN EN ISO 13337:2009
Product Type	Slotted Spring Pin, Light Duty
Design	Cylindrical body with longitudinal slot
Nominal Diameter	2–50 mm
Standard Diameters	2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 10, 12, 13, 14, 16, 18, 20, 21, 25, 28, 30, 35, 40, 45, 50 mm
Materials	Steel, Austenitic Stainless Steel, Martensitic Stainless Steel
Length	Standard lengths according to ISO 13337
Recommended Hole Tolerance	H12
Surface Condition	Natural finish with protective lubricant, unless otherwise agreed
Shear Strength Test	According to ISO 8749
Customization	Other materials and product requirements by agreement

Nominal Length (L)	Length Tolerance
L ≤ 10 mm	±0.25 mm
10 < L ≤ 50 mm	±0.5 mm
50 < L ≤ 200 mm	±0.75 mm

Buyers should confirm the applicable standard edition and dimensional requirements with the supplier before ordering. The approved drawing and purchase specification should serve as the basis for production inspection and acceptance.

ISO 13337 and ISO 8752 cover different duty classifications of slotted spring pins. ISO 13337 specifies light-duty slotted spring pins, while ISO 8752 specifies heavy-duty slotted spring pins.

The distinction affects product selection because the pin must match the mechanical requirements of the assembly. Buyers should not substitute one standard for the other based only on nominal diameter.

Comparison	ISO 13337	ISO 8752
Classification	Light duty	Heavy duty
Structure	Slotted cylindrical pin	Slotted cylindrical pin
Selection consideration	Assembly load and retention requirements	More demanding load and retention requirements
Buyer focus	Hole fit, pin dimensions, and application conditions	Load requirements, pin dimensions, and mating component strength

When replacing an existing pin, buyers should check the original standard, diameter, length, material, and hole dimensions. A replacement should be approved against the assembly requirements rather than selected by appearance alone.

Diameter and length determine how the pin fits into the mating hole and how much of the connected components it engages.

When selecting the diameter, buyers should first identify the finished hole size and its tolerance. The recommended hole tolerance in the supplied ISO 13337 specification is H12. The selected pin must also match the requirements of the connected materials and installation process.

Length selection should account for:

The combined thickness of the connected components.
The required engagement depth.
The position of the pin relative to adjacent parts.
Any clearance needed at the pin ends.
The dimensional tolerance specified in the drawing.

For assemblies involving several components, buyers should provide the complete assembly drawing rather than only the nominal pin dimensions. This helps the manufacturer review the pin length and installation position together.

Material selection depends on mechanical requirements, corrosion exposure, operating conditions, and the properties of the mating components.

Material	Main Considerations	Typical Selection Conditions
Steel	Material grade, heat treatment, hardness, and surface protection	General mechanical assemblies
Austenitic Stainless Steel	Corrosion exposure and required mechanical properties	Assemblies exposed to moisture or corrosive environments
Martensitic Stainless Steel	Hardness, strength, corrosion conditions, and heat treatment	Applications requiring a different balance of mechanical properties

Buyers should specify the exact material grade rather than simply requesting steel or stainless steel. Different grades can have different mechanical and corrosion properties.

Material selection should also consider the mating-hole material. A pin installed in a softer component may behave differently from one installed in a hardened steel part.

Shear strength depends on material properties, pin diameter, heat treatment, pin structure, and the way the pin is installed.

The number and position of shear planes also influence the loading condition. A pin connecting two components may experience a different load distribution from one passing through three components.

Buyers should consider the following factors:

Material grade: Different steel and stainless steel grades have different mechanical properties.
Heat treatment: The specified treatment affects hardness and the mechanical behavior of the pin.
Pin diameter: The effective cross-sectional area influences the load the pin can withstand.
Assembly configuration: Single-shear and double-shear arrangements create different loading conditions.
Hole fit: Incorrect hole dimensions can affect contact and load transfer between the pin and components.

The supplied product specification identifies ISO 8749 as the shear strength test reference. When shear performance is a critical acceptance requirement, buyers should request the relevant test method and results.

Yes. Buyers can discuss customized materials and product requirements with manufacturers, subject to technical review and production feasibility.

Customization may involve non-standard dimensions, material grades, surface conditions, or inspection requirements. However, a customized pin should not automatically be described as fully compliant with ISO 13337 if its dimensions or other controlled characteristics depart from the standard.

Before approving a customized order, buyers should confirm:

Which dimensions follow ISO 13337.
Which dimensions are modified according to the drawing.
Whether the material or heat-treatment requirements have changed.
Whether the surface condition differs from the standard product.
Which inspection items determine final acceptance.

For drawing-based projects, the manufacturer should review the drawing and clarify incomplete or conflicting specifications before production.

Slotted spring pins are generally installed by pressing them into a prepared hole. The longitudinal slot allows the cylindrical body to compress as it enters the hole. After insertion, the pin expands against the hole wall and creates radial contact pressure.

A typical installation process involves three steps:

1. Prepare the hole. Confirm that the hole diameter, tolerance, and surface condition meet the assembly drawing.

2. Align the components. Position the mating components and align their holes before inserting the pin.

3. Press the pin into place. Use a suitable installation tool to apply axial force and guide the pin into the hole without damaging its ends or deforming the connected components.

For production assembly, buyers should consider the installation tool, pin orientation, component alignment, and insertion-force requirements. These factors can affect assembly consistency, particularly when pins are installed repeatedly on an automated line.