Steel Spring Pins

Q: What are the common types of steel spring pins and when should I use each?

The most common forms of steel spring pins include: Slotted roll pins: The standard type, cut with a longitudinal slot to allow compression. They are widely used for general-purpose securing across shafts and housings. Hollow roll pins (also called shaft pins): Similar to slotted pins but with a continuous hollow bore for lighter assemblies or where a wire insert is needed. Double-slit or multi-slit pins: Provides higher expansion in larger holes and can offer greater resistance to transverse shear in some designs. Metric and inch sizes: Available in both metric (mm) and imperial (inch) dimensions to suit regional standards and component specifications. Choosing between these depends on hole diameter, load, ease of installation, and whether removal and reassembly are frequent. For most standard mechanical assemblies, a carbon steel or stainless steel slotted roll pin in the correct size provides a robust, vibration-resistant fastener.

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RS PRO 5 mm Diameter Galvanised Steel Spring Pin

RS Stock No. 037-4058

Brand RS Pro

Category: Spring Pins
Finish: Galvanised
Pin Type: Slotted Spring

AED 61.68

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RS PRO 2 mm Diameter Galvanised Steel Spring Pin

RS Stock No. 037-4008

Brand RS Pro

Finish: Galvanised
Length: 30 x 12 mm, 30 x 18 mm, 30 x 20 mm, 30 x 8 mm
Pin Type: Slotted Spring

AED 56.18

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RS PRO 2.5 mm Diameter Galvanised Steel Spring Pin

RS Stock No. 037-4014

Brand RS Pro

Diameter: 2.5mm
Length: 30 x 12 mm, 30 x 18 mm, 30 x 20 mm, 30 x 8 mm
Pin Type: Slotted Spring

AED 56.51

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RS PRO 3.5 mm Diameter Galvanised Steel Spring Pin

RS Stock No. 037-4036

Brand RS Pro

Category: Spring Pins
Finish: Galvanised
Pin Type: Slotted Spring

AED 65.28

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RS PRO 4 mm Diameter Galvanised Steel Spring Pin

RS Stock No. 037-4042

Brand RS Pro

Diameter: 4mm
Material: Steel
Pin Type: Slotted Spring

AED 63.31

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RS PRO 3 mm Diameter Galvanised Steel Spring Pin

RS Stock No. 037-4020

Brand RS Pro

Category: Spring Pins
Finish: Galvanised
Length: 30 x 10 mm, 30 x 16 mm, 30 x 24 mm, 30 x 30 mm

AED 67.63

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RS PRO 600 piece Galvanised Steel Spring Tension Pin Kit 5 mm 40 mm

RS Stock No. 037-4064

Brand RS Pro

Diameter Largest: 5mm
Material: Steel
System of Measurement: Metric

AED 394.12

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Pinet Raw Stainless Steel Spring with a Spring Loaded Pin, 60 mm x 35 mm x 1 mm

RS Stock No. 183-1638

Brand Pinet

Closing Type: Spring
Pin Style: Spring Loaded
Thickness: 1mm

AED 273.85

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Pinet Raw Steel Spring with a Spring Loaded Pin, 12 mm x 4 mm x 1.5 mm

RS Stock No. 917-4425

Brand Pinet

Hinge Type: Spring
Pin Style: Spring Loaded
Product Type: Spring Hinge

AED 91.85

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Pinet Raw 304 Stainless Steel Spring with a Spring Loaded Pin, 12 mm x 4 mm x 1.5 mm

RS Stock No. 917-4422

Brand Pinet

Category Link: https://ae.rsdelivers.com/browse/ppe-safety-test-it/security-ironmongery/latches-hinges-handles/hinges
Hinge Type: Spring
Thickness: 1.5mm

AED 128.64

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Pinet Raw Steel Spring with a Spring Loaded Pin, 180 mm x 40 mm x 1.5 mm

RS Stock No. 917-4428

Brand Pinet

Category Link: https://ae.rsdelivers.com/browse/ppe-safety-test-it/security-ironmongery/latches-hinges-handles/hinges
Section: Security & Ironmongery
Super Section: Latches, Hinges & Handles

AED 207.85

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Pinet Raw 304 Stainless Steel Spring with a Spring Loaded Pin, 180 mm x 4 mm x 1.5 mm

RS Stock No. 917-4444

Brand Pinet

Category: Hinges
Category Link: https://ae.rsdelivers.com/browse/ppe-safety-test-it/security-ironmongery/latches-hinges-handles/hinges
Closing Type: Spring

AED 180.15

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Pinet Raw Steel Spring with a Spring Loaded Pin, 240 mm x 40 mm x 1.5 mm

RS Stock No. 917-4453

Brand Pinet

Category Link: https://ae.rsdelivers.com/browse/ppe-safety-test-it/security-ironmongery/latches-hinges-handles/hinges
Hinge Type: Spring
Width: 40 mm

AED 187.91

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Pinet Zinc Plated Steel Spring with a Spring Loaded Pin, drilled Fixing, 180 mm x 4 mm x 1.5 mm

RS Stock No. 917-4440

Brand Pinet

Finish: Zinc Plated
Holes per Leaf: 3
Section: Security & Ironmongery

AED 151.56

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Pinet Raw Stainless Steel Spring with a Spring Loaded Pin, Screw Fixing, 180 mm x 40 mm x 1.5 mm

RS Stock No. 917-4412

Brand Pinet

Category: Hinges
Thickness: 1.5mm
Width: 40 mm

AED 216.89

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Pinet Raw 304 Stainless Steel Spring with a Spring Loaded Pin, drilled Fixing, 180 mm x 4 mm x 1.5 mm

RS Stock No. 917-4438

Brand Pinet

Finish: Raw
Length: 180mm
Pin Diameter: 4mm

AED 198.86

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Pinet Zinc Plated Steel Spring with a Spring Loaded Pin, Screw Fixing, 240 mm x 40 mm x 1.5 mm

RS Stock No. 917-4456

Brand Pinet

Holes per Leaf: 4
Length: 240mm
Product Type: Spring Hinge

AED 188.07

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Pinet Raw Stainless Steel Spring with a Spring Loaded Pin, Screw Fixing, 240 mm x 40 mm x 1.5 mm

RS Stock No. 917-4478

Brand Pinet

Closing Type: Spring
Length: 240mm
Pin Style: Spring Loaded

AED 420.19

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Pinet Zinc Plated Steel Spring with a Spring Loaded Pin, 50 mm x 50 mm x 2 mm

RS Stock No. 183-1637

Brand Pinet

Category: Hinges
Category Link: https://ae.rsdelivers.com/browse/ppe-safety-test-it/security-ironmongery/latches-hinges-handles/hinges
Pin Style: Spring Loaded

AED 110.38

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Pinet Raw 304 Stainless Steel Spring with a Spring Loaded Pin, 24 mm x 4 mm x 1.5 mm

RS Stock No. 917-4475

Brand Pinet

Finish: Raw
Material: 304 Stainless Steel
Pin Style: Spring Loaded

AED 260.09

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Steinbach & Vollman Stainless Steel Spring with a Barrel Pin, 76.2 mm x 50.8 mm x 8.75 mm

RS Stock No. 240-0533

Brand Steinbach & Vollman

Category Link: https://ae.rsdelivers.com/browse/ppe-safety-test-it/security-ironmongery/latches-hinges-handles/hinges
Hinge Type: Spring
Pin Style: Barrel

AED 143.13

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Pinet Raw 304 Stainless Steel with a Spring Loaded Pin, Bolt-On Fixing, 82 mm x 18.2 mm x 2.8 mm

RS Stock No. 347-8478

Brand Pinet

Category: Hinges
Finish: Raw
Length: 82mm

AED 178.41

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RS PRO Stainless Steel Piano with a Spring Loaded Pin, 75 mm x 20 mm x 0.7 mm

RS Stock No. 726-4093

Brand RS Pro

Material: Stainless Steel
Section: Security & Ironmongery
Thickness: 0.7mm

AED 74.99

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Pinet Steel Latch with a Spring Loaded Pin, LH-Handed, Bolt-On Fixing, 82 mm x 21 mm x 2.8 mm

RS Stock No. 436-6843

Brand Pinet

Length: 82mm
Material: Steel
Pin Style: Spring Loaded

AED 65.84

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What are steel spring pins and how do they work?

Steel spring pins, commonly called roll pins, are hollow cylindrical fasteners engineered to retain parts in precise alignment. They are slit along their length so they can compress as they are inserted into a slightly undersized hole. Once fully seated, the pin expands radially inside the hole, creating a secure, vibration-resistant interference fit without the need for threads, heat, or adhesives. This makes them ideal for shafts, gears, pulleys, couplings, and assemblies that may require frequent disassembly or maintenance.

Steel spring pins combine simplicity with reliability. Their expandable design distributes load along the pin’s length and provides resistance to loosening under dynamic loads, making them a staple in mechanical assemblies, automotive components, industrial machinery, robotics, and hardware kits.

What are the common types of steel spring pins and when should I use each?

The most common forms of steel spring pins include:

Slotted roll pins: The standard type, cut with a longitudinal slot to allow compression. They are widely used for general-purpose securing across shafts and housings.
Hollow roll pins (also called shaft pins): Similar to slotted pins but with a continuous hollow bore for lighter assemblies or where a wire insert is needed.
Double-slit or multi-slit pins: Provides higher expansion in larger holes and can offer greater resistance to transverse shear in some designs.
Metric and inch sizes: Available in both metric (mm) and imperial (inch) dimensions to suit regional standards and component specifications.

Choosing between these depends on hole diameter, load, ease of installation, and whether removal and reassembly are frequent. For most standard mechanical assemblies, a carbon steel or stainless steel slotted roll pin in the correct size provides a robust, vibration-resistant fastener.

What materials and finishes are available for steel spring pins?

Steel spring pins are offered in a range of materials and finishes to suit environments and corrosion requirements:

Carbon steel: Common, cost-effective, suitable for general-purpose use with good strength.
Stainless steel (e.g., AISI 304/316): Excellent corrosion resistance, ideal for damp, humid, or saline environments and outdoor applications.
Alloy steel: Higher strength for demanding loads or high-service life applications.

Finishes and coatings commonly used include:

Zinc-plated or galvanized: Improved corrosion resistance for general environments.
Aesthetics and additional protection for stainless or alloy pins.
Enhanced wear resistance in some precision applications.

When selecting, consider environment, temperature, exposure to chemicals, and the mating components to ensure compatibility and longevity.

What sizes and tolerances are typical for steel spring pins?

Sizes for steel spring pins come in both metric and imperial offerings. Typical diameters range from small to large to match standard hole sizes in assemblies:

Imperial (inch): common diameters such as 1/16", 3/32", 1/8", 3/16", 1/4", up to 1/2" (with corresponding lengths to suit your bore depth).
Metric (mm): typical diameters include 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm, etc., with lengths chosen to penetrate the assembly sufficiently without protruding excessively.

Tolerances depend on the pin series and material, but you will usually see standard tolerances that balance fit and ease of installation. Always consult the manufacturer’s catalog for exact tolerance data and ensure your hole size and depth are compatible with the selected pin to achieve reliable seating and removal.

How do I install a steel spring pin correctly?

Proper installation ensures maximum retention and minimizes damage to both the pin and the housing. Follow these steps:

Ensure hole diameter and depth match the pin size and that the hole is clean and free of debris.
Align the pin with the hole and gently start by hand to ensure it seats squarely.
Use an appropriate pin punch or installation tool to drive the pin in until it is flush or to the required depth. Do not hammer directly on the pin to avoid deformation.
Check seating by attempting light axial movement. A properly seated roll pin should resist rotation and axial displacement while remaining removable when needed.
Inspect the assembly for even expansion along the length of the hole. If the pin binds or seats unevenly, remove and recalculate the fit.

For automated or high-volume production, consider using a press or specialized installation tools designed for roll pins to ensure consistency and throughput.

What are the best practices for removal and re-use of steel spring pins?

Removal is straightforward but care is needed to avoid damage to the surrounding components:

Use a thin punch or pry tool to access one edge of the pin and gently drive it out in the reverse direction of installation.
Inspect both the pin and the hole for wear, deformities, or scoring. Replace damaged pins and, if the hole shows signs of wear, consider resizing or re-boring as needed.
Re-use of roll pins is possible in light-duty applications where the pin has not experienced deformation or excessive shear. In high-load or critical assemblies, replace with a new pin to ensure integrity.

For critical safety or aerospace/automotive applications, follow the relevant maintenance manual and supplier recommendations regarding re-use limits.

What applications are steel spring pins ideal for?

Steel spring pins are versatile in many sectors due to their simple installation and reliable retention:

Automotive and motorcycle components (driveshaft couplings, gears, shafts)
Industrial machinery and robotics (bearings, pulleys, gear trains)
Electromechanical assemblies and control housings
Aerospace and defense applications requiring vibration resistance with maintenance-friendly fasteners
DIY and hardware kits for hobby projects, electronics enclosures, and furniture assemblies

Their tolerance for vibration and axial loads makes them a preferred choice where threaded fasteners are impractical or where rapid field maintenance is needed.

What standards and specifications relate to steel spring pins?

Steel spring pins are covered by a variety of international standards and supplier specifications. Common references include:

DIN standards for roll pins used in European manufacturing
ISO considerations for pin geometry and material hardness
ANSI/ASME guidelines for fasteners and vibration-resistant connections
Manufacturer datasheets specifying material grade, coating, diameter, length, and recommended tolerances

When ordering, verify the standard, material grade, corrosion resistance, and fit to your application. RS Components typically lists these details on product pages to help you compare options quickly.

How should I measure and specify steel spring pins for placing an order?

Accurate measurement ensures you select the correct pin for your hole and load requirements:

Determine the hole diameter and the intended seating depth in the assembly.
Choose the pin diameter that provides the appropriate interference fit (often slightly smaller than the hole to allow expansion).
Select the pin length so it fully engages the hollow portion or extends as required by the design, without protruding excessively.
Specify the material (carbon steel, stainless steel, alloy), finish (zinc, nickel, passivation), and any special coatings or heat treatment if needed.

If you’re unsure, use a trusted supplier’s sizing chart or contact technical support for dimensional guidance to prevent undersized or oversized pins.

Why choose RS Components for steel spring pins?

RS Components offers a broad range of steel spring pins in various materials, finishes, and standards, with detailed datasheets to help you compare options. Whether you need carbon steel roll pins for general purpose, stainless steel pins for corrosive or damp environments, or specialty coatings for enhanced wear resistance, RS Components provides:

Multiple sizes in both metric and imperial units
Clear specifications for diameter, length, material grade, and finish
Reliable supply and quick delivery for prototyping and production runs
Technical support and application notes to assist with installation and maintenance

This makes it easier to design, source, and assemble robust fastener solutions across mechanical, electrical, and industrial projects.

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"Steel Spring Pins"

RS PRO 5 mm Diameter Galvanised Steel Spring Pin

RS PRO 2 mm Diameter Galvanised Steel Spring Pin

RS PRO 2.5 mm Diameter Galvanised Steel Spring Pin

RS PRO 3.5 mm Diameter Galvanised Steel Spring Pin

RS PRO 4 mm Diameter Galvanised Steel Spring Pin

RS PRO 3 mm Diameter Galvanised Steel Spring Pin

RS PRO 600 piece Galvanised Steel Spring Tension Pin Kit 5 mm 40 mm

Pinet Raw Stainless Steel Spring with a Spring Loaded Pin, 60 mm x 35 mm x 1 mm

Pinet Raw Steel Spring with a Spring Loaded Pin, 12 mm x 4 mm x 1.5 mm

Pinet Raw 304 Stainless Steel Spring with a Spring Loaded Pin, 12 mm x 4 mm x 1.5 mm

Pinet Raw Steel Spring with a Spring Loaded Pin, 180 mm x 40 mm x 1.5 mm

Pinet Raw 304 Stainless Steel Spring with a Spring Loaded Pin, 180 mm x 4 mm x 1.5 mm

Pinet Raw Steel Spring with a Spring Loaded Pin, 240 mm x 40 mm x 1.5 mm

Pinet Zinc Plated Steel Spring with a Spring Loaded Pin, drilled Fixing, 180 mm x 4 mm x 1.5 mm

Pinet Raw Stainless Steel Spring with a Spring Loaded Pin, Screw Fixing, 180 mm x 40 mm x 1.5 mm

Pinet Raw 304 Stainless Steel Spring with a Spring Loaded Pin, drilled Fixing, 180 mm x 4 mm x 1.5 mm

Pinet Zinc Plated Steel Spring with a Spring Loaded Pin, Screw Fixing, 240 mm x 40 mm x 1.5 mm

Pinet Raw Stainless Steel Spring with a Spring Loaded Pin, Screw Fixing, 240 mm x 40 mm x 1.5 mm

Pinet Zinc Plated Steel Spring with a Spring Loaded Pin, 50 mm x 50 mm x 2 mm

Pinet Raw 304 Stainless Steel Spring with a Spring Loaded Pin, 24 mm x 4 mm x 1.5 mm

Steinbach & Vollman Stainless Steel Spring with a Barrel Pin, 76.2 mm x 50.8 mm x 8.75 mm

Pinet Raw 304 Stainless Steel with a Spring Loaded Pin, Bolt-On Fixing, 82 mm x 18.2 mm x 2.8 mm

RS PRO Stainless Steel Piano with a Spring Loaded Pin, 75 mm x 20 mm x 0.7 mm

Pinet Steel Latch with a Spring Loaded Pin, LH-Handed, Bolt-On Fixing, 82 mm x 21 mm x 2.8 mm

What are steel spring pins and how do they work?

What are the common types of steel spring pins and when should I use each?

What materials and finishes are available for steel spring pins?

What sizes and tolerances are typical for steel spring pins?

How do I install a steel spring pin correctly?

What are the best practices for removal and re-use of steel spring pins?

What applications are steel spring pins ideal for?

What standards and specifications relate to steel spring pins?

How should I measure and specify steel spring pins for placing an order?

Why choose RS Components for steel spring pins?