Custom Slotted Spring Pins Manufacturer for Radial Retention & Mechanical Assembly

Anhui Pins manufactures slotted pins and slotted spring pins with a longitudinal slot that allows the pin body to compress during insertion and expand against the mating hole. This spring action creates radial retention between the pin and hole, making the pin suitable for shaft retention, component fastening, hinge joints and mechanical connections exposed to movement or vibration.

We produce slotted pins to DIN 1481, ISO 8752 and customer-defined specifications, with production controlled around the required pin diameter, free diameter, length, slot geometry, wall thickness and hardness. Custom configurations can be manufactured from customer drawings or samples when the standard size does not match the required hole and assembly conditions.

Need Custom Slotted Pins?

Send your drawings, size requirements, material grade, or batch quantity. We can support OEM manufacturing and fast quotation.

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Elastic Fastening

Stable interference-fit retention for industrial fastening systems and mechanical assemblies.

 

Anti-Loosening

Reliable retention under vibration, repeated movement, and mechanical load conditions.

 

OEM Production

Flexible custom manufacturing based on drawings, samples, specifications, and production quantities.

 

Precision Quality

Controlled dimensions, material consistency, and inspection procedures for stable batch production.

Standards

Manufactured in accordance with standards

Standard
Specification
Description
View PDF file
ISO
ISO 8752
Spring-Duty Straight Pins-Slotted, Heavy Duty
PDF
ISO
ISO 13337
Spring-Duty Straight Pins-Slotted, Light Duty
PDF
GB/T
GB/T 879.1
Spring-Duty Straight Pins-Slotted, Heavy Duty
PDF
GB/T
GB/T 879.2
Spring-Duty Straight Pins-Slotted, Light Duty
PDF
  • Heavy Duty Slotted Spring Pins ISO 8752
    Standard: ISO 8752
    Material: Spring Steel / Stainless Steel
    Duty Type: Heavy Duty
    Diameter: Standard & Custom Diameters Available
    Length: Standard & Custom Lengths...
  • ISO 8752 Slotted Pins
    Standard: ISO 8752 (DIN 1481)
    Product Type: Slotted Spring Pins / Heavy Duty Slotted Pins
    Nominal Diameter: M1.5 – M50 (Custom sizes available upon request)
    Material: Spring...
  • Heavy Duty Slotted Spring Pins
    Manufacturing Standards: ISO 8752 (DIN 1481) Heavy Duty, ISO 13337 (DIN 7346) Light Duty
    Diameter Range (d): Metric 1.0 mm – 50.0 mm / Inch 1/16" – 2"
    Length Range (L): 4.0 mm – 200.0 mm...
  • Slotted Roll Pins
    Manufacturing Standards: ISO 8752 (Heavy Duty), ISO 13337 (Light Duty)
    Diameter Range (d): Metric 1.0 mm – 50.0 mm / Inch 1/16" – 2"
    Length Range (L): 4.0 mm – 200.0 mm
    Material...
  • Metric Slotted Spring Pins
    Applicable Standards: ISO 8752 / ISO 13337 / GB/T 879.1 / GB/T 879.2
    Duty Types: Heavy Duty / Light Duty
    Diameter: Metric 2.0–20.0 mm
    Length: 6.0–150.0 mm
    Material: Spring...
  • Slotted Spring Pins
    Standards: ISO 8752 / ISO 13337
    Duty Types: Heavy Duty / Light Duty
    Material: Spring Steel / Stainless Steel
    Diameter: Metric & Inch Sizes / Custom Diameters Available
    Length:...
  • Stainless Steel Spring Pins
    Diameter: Available in standard diameters according to ISO 8752, DIN 1481 standards. Custom diameters are available upon request.
    Length: Available in various standard lengths with custom...

Custom Slotted Spring Pins Manufacturing Capability

We provide OEM and custom slotted pin manufacturing solutions based on customer drawings, samples, and technical specifications. Our production supports non-standard dimensions, special slot structures, and customized tolerance requirements for industrial fastening and positioning applications.

With flexible manufacturing capability and stable batch production control, we support global OEM customers requiring custom diameters, lengths, materials, surface finishes, and packaging solutions for long-term industrial supply programs.

Custom Diameter & Length
Special Slot Width Design
Drawing-Based Manufacturing
Surface Finish Customization
Slotted Pin

 

Slotted Pins Manufacturing Process Flow

Tooling & Die

Tooling & Die Manufacturing

Progressive dies control slot geometry, forming radius, and compression behavior during insertion.

Raw Material Slitting

Raw Material Slitting

Spring steel strips are slit into controlled widths to maintain stable feeding and forming accuracy.

Stamping Process

Stamping Process

Steel strips are stamped and rolled into elastic cylindrical structures with controlled slot width.

Heat Treatment

Heat Treatment

Quenching and tempering stabilize hardness, elasticity, and deformation resistance under cyclic load.

Inspection

Heat Treatment Inspection

Hardness, deformation, and dimensional stability are checked after thermal processing operations.

Grinding Process

Grinding Process

Grinding controls outer diameter tolerance and improves surface consistency before coating.

Surface Treatment

Surface Treatment

Natural Finish + Protective Lubricant
Electroplating, Phosphating, Coatings (Hydrogen Embrittlement Relief)

Optical Sorting

Optical Sorting

Optical systems detect slot deviation, deformation, and surface defects before packaging. 

Quality Inspection System

A strict quality inspection system is implemented throughout the entire slotted pin manufacturing process to ensure stable dimensional accuracy, reliable fastening performance, and consistent batch quality for industrial applications.

Multi-Stage Inspection Management

Our inspection procedures cover raw materials, production dimensions, slot consistency, hardness performance, surface quality, and final product verification before shipment.

Raw materials: elemental properties
Molding: appearance, dimensions
Heat treatment: hardness
Surface treatment: corrosion detection
Finished product dimensions & shear force
Inspection Accuracy

Consistency Control For OEM Orders

Strict inspection procedures help maintain dimensional stability and fastening consistency across bulk OEM production batches.

Production Traceability

Stable Industrial Quality Management

Quality management procedures support production traceability, process consistency, and stable industrial fastening performance.

Factory Strength & Production Capability

Our manufacturing facility focuses on precision slotted pin production with stable process control, consistent batch quality, and reliable OEM supply capability. Equipped with automated production systems and precision inspection equipment, we support large-volume industrial orders with stable manufacturing performance.

01

Automated Production

Automated production lines support stable manufacturing efficiency and consistent batch quality control.

02

Precision Inspection

Equipped with precision inspection equipment for dimensional verification and fastening consistency control.

03

Stable OEM Supply

Reliable OEM manufacturing capability for large-volume industrial fastening component supply programs.

With abundant experience, we are one of the most professional slotted pins manufacturers and suppliers in China. Please rest assured to buy high quality slotted pins made in China here from our factory. For custom service and OEM&ODM service, contact us now.

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