Precision Roll Pins & Spring Tension Pins

High-precision DIN 1481 spring tension pins and DIN 7343 dowel pins with AutoBlack finish and tight tolerances for critical assembly applications in industrial machinery and automotive.

DIN Pin Types

Two complementary DIN standards providing spring tension and precise alignment for diverse industrial fastening applications.

DIN 1481

Spring Tension Pins

Slotted cylindrical pins designed to provide spring tension and secure components through their natural spring force.

Key Features

  • Continuous split design for consistent tension
  • Sizes: Ø 2mm to Ø 20mm
  • Lengths: 4mm to 500mm
  • AutoBlack finish for corrosion protection
  • Precise manufacturing tolerances
  • Applications: Couplings, hubs, drive mechanisms

Material Composition

  • Alloy spring steel (SAE 1070 equivalent)
  • High carbon content for strength
  • Tempered for consistent spring properties
  • Non-magnetic after AutoBlack treatment
DIN 7343

Precision Dowel Pins

Solid cylindrical pins designed for precise alignment and location of components in assembly operations.

Key Features

  • Solid construction for rigid positioning
  • Sizes: Ø 1mm to Ø 16mm
  • Lengths: 4mm to 80mm
  • AutoBlack finish for enhanced protection
  • Hardened steel for durability
  • Applications: Precision assemblies, alignment

Tolerance Specifications

  • Diameter tolerance: h7 (tight fit)
  • Length tolerance: ±0.5mm
  • Runout: < 0.10mm TIR
  • Surface finish: Ra 0.8-1.6 micrometers

Tolerance & AutoBlack Finish

Precision manufacturing with advanced surface treatment ensuring consistent performance and superior corrosion resistance.

Precision Tolerances

Our pins are manufactured with tight tolerances ensuring precise fit and alignment in critical assembly operations.

  • Diameter tolerance: h7 to h8
  • Length tolerance: ±0.5mm standard
  • Cylindricity: < 0.05mm
  • Straightness: < 0.10mm per 100mm
  • Surface finish: Ra 0.4-1.6 micrometers
  • 100% inspection of critical dimensions

AutoBlack Finish Benefits

Advanced surface treatment providing superior corrosion protection and aesthetic appeal for industrial applications.

  • Nitrided black oxide coating
  • Thickness: 10-25 micrometers
  • Corrosion resistance exceeds zinc plating
  • Salt spray testing: > 1000 hours ASTM B117
  • Improved lubricity reduces assembly friction
  • Professional dark appearance

Technical Specifications

Standard Type Diameter Range Material Finish
DIN 1481 Spring Tension Pin Ø 2mm - Ø 20mm Alloy Spring Steel AutoBlack
DIN 7343 Dowel Pin Ø 1mm - Ø 16mm Hardened Steel AutoBlack

Industrial Applications

Trusted by manufacturers across multiple industries for critical assembly and alignment operations.

Machinery & Drive Systems

Spring pins in motor couplings, pulley hubs, and drive shaft assemblies where spring tension secures components against vibration and rotation.

Precision Assembly

Dowel pins in manifolds, valve bodies, and structural assemblies ensuring precise alignment and maintaining component integrity.

Automotive Components

Used in transmission assemblies, brake systems, and suspension components where tight tolerances and corrosion resistance are essential.

Agricultural Equipment

Spring pins in harvester mechanisms and drive trains; dowel pins in gearbox assemblies ensuring reliable operation in demanding conditions.

Hydraulic & Pneumatic Systems

Critical components in actuator assemblies and control valve mechanisms where alignment precision directly impacts system performance.

General Industrial Fastening

Versatile solutions for machinery assemblies, tool fixtures, and custom mechanical applications requiring secure, reliable fastening.

Packaging & Delivery

Flexible packaging solutions designed for both retail distribution and industrial bulk requirements.

Retail Packaging

  • Small retail boxes
  • 25 to 100 pieces per box
  • Clear specification labeling
  • Display-ready packaging
  • Barcode compatible
  • Protective inner dividers

Bulk Industrial

  • Master cartons up to 5,000 pcs
  • Moisture-resistant packaging
  • Organized by size/type
  • Custom box labeling available
  • Pallet-friendly packaging
  • Cost-effective for high volumes

Export Logistics

  • Euro pallet or US pallet compatible
  • ISPM 15 certification
  • Sea-worthy protection
  • Desiccant moisture control
  • Multi-language documentation
  • Door-to-door delivery available

Need Precision Pins for Your Assembly?

Whether you require DIN 1481 spring tension pins or DIN 7343 dowel pins, our team can discuss your application requirements, tolerances, and delivery specifications.

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