M18 Castle Nut (DIN 935) 4.5mm Slot Width | Marine Grade A4 Stainless Steel

Product code: CSTN935-M18-A4
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M18 Castle Nut (DIN 935) 4.5mm Slot Width | Marine Grade A4 Stainless Steel
M18 Castle Nut (DIN 935) 4.5mm Slot Width | Marine Grade A4 Stainless Steel
M18 Castle Nut (DIN 935) 4.5mm Slot Width | Marine Grade A4 Stainless Steel
M18 Castle Nut (DIN 935) 4.5mm Slot Width | Marine Grade A4 Stainless Steel
M18 Castle Nut (DIN 935) 4.5mm Slot Width | Marine Grade A4 Stainless Steel
M18 Castle Nut (DIN 935) 4.5mm Slot Width | Marine Grade A4 Stainless Steel
Quantity
Unit Price
(ex. VAT)
Unit Price
(inc. VAT)
1 - 99 £5.25 £6.30
100 - 999 £5.07 £6.08
1000 + £3.41 £4.09
£6.30 / each
Quantity:


Product Specification
Thread Size M18
Thread Pitch 2.50mm
Across Flats 27.0mm
Total Height 21.0mm
Slot Width 4.5mm
Nut Height 15.0mm
Material A4 Stainless Steel

Next Day or Standard Delivery available via DHL or Royal Mail.
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M18 Castle Nut DIN 935 - A4 Stainless Steel

The M18 Castle Nut DIN 935 - A4 Stainless Steel CSTN935-M18-A4 is a castellated locking nut designed for secure fastening applications where a split pin or locking wire is used to prevent loosening under vibration or movement.

What are Castle Nuts?

M18 Castle Nut DIN 935 - A4 Stainless Steel CSTN935-M18-A4 is a hexagonal slotted nut manufactured to DIN 935 standards. Commonly paired with a drilled bolt or shaft these nuts allow a retaining pin to pass through the slots, helping to keep the assembly locked in position for reliable long-term use.

Key Features:

  • Manufactured to DIN 935 specification
  • Made from A4 Stainless Steel
  • Castle nut design with slotted top for use with split pins
  • Suitable for locking assemblies exposed to movement or vibration
  • Metric M18 thread size with 2.50mm pitch
  • Corrosion resistant construction for indoor and outdoor applications

Key Applications and Industries

These castle nuts are widely used across UK engineering, automotive, agricultural, marine, maintenance and machinery applications where a dependable locking nut is required. They are ideal for securing rotating parts, hubs, shafts, linkage systems and bolted assemblies that benefit from additional mechanical locking.

Technical Specifications

  • Product Code: CSTN935-M18-A4
  • Thread Size: M18
  • Pitch: 2.50mm
  • Nut Height: 15.0mm
  • Total Height: 21.0mm
  • Across Flats: 27.0mm
  • Slot Width: 4.50mm
  • Standard: DIN 935
  • Material: A4 Stainless Steel

Benefits:

  • Helps prevent accidental loosening in critical assemblies
  • Provides a dependable mechanical locking method when used with a split pin
  • Offers strong resistance to corrosion and wear
  • Suitable for replacement, repair and OEM applications
  • Available in a range of metric sizes to suit different fastening requirements

Why Buy from Vital Parts?

At Vital Parts we supply high quality fasteners and fixing components for trade, industrial and commercial use across the UK.

  • High quality components available in a range of sizes
  • Competitive pricing for single and bulk quantities
  • Fast UK delivery options available
  • Expert support for product selection and technical queries

If you need assistance selecting the right size or would like to discuss custom options , contact our expert team at 01233 713581.

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