M16 Thin Castle Nuts (DIN 937) Marine Stainless Steel (A4)


Key Features

  • M16 Metric Thread Size (16mm)
  • A4 Stainless Steel, also known as marine grade or 316 Stainless Steel. Details.
  • Thread Size (T): M16 (16mm)
  • Nut Width A/F (F): 24mm
  • Nut THickness (T): 7mm
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M16 Thin Castle Nuts (DIN 937) Marine Stainless Steel (A4) Technical Specification

M16 Thin Castle Nuts (DIN 937) Marine Stainless Steel (A4) Drawing
Castellation Width (CW)21.48mm
Length (L)11.57mm
Manufacturing StandardDIN 937
MaterialMarine Stainless Steel (A4)
Material SpecificationMarine Stainless Steel (A4)
Metric or Imperial?Metric
Nut Thickness (T)7mm
Nut Width A/F (F)24mm
Slot Width (A)4.5mm
Thread Size (T)M16 (16mm)

Product Certifications

Certificate of Conformity Included
Certificate of Conformity Included
RoHS Certified
RoHS Certified
REACH Certified
REACH Certified
Quality Approved

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M16 Thin Castle Nuts (DIN 937) Marine Stainless Steel (A4) Description

The M16 Thin Castle Nuts (DIN 937) Marine Stainless Steel (A4) has the following features:

  • M16 (16mm) Thread Size (T)
  • DIN 937 Manufacturing Standard
  • 11.57mm Length (L)
  • 4.5mm Slot Width (A)
  • 24mm Nut Width A/F (F)
  • Marine Stainless Steel (A4) Material
  • Marine Stainless Steel (A4) Material Specification
  • 2mm Pitch
  • Natural Finish
  • 21.48mm Castellation Width (CW)
  • Metric Metric or Imperial?
  • 7mm Nut Thickness (T)

Discover more about the Thin Castle Nuts range

Thin Castle Nuts are a reduced-height version of Accu’s standard Castle Nuts. These components feature a castellated top, which allows them to lock in place when used alongside a horizontal locking pin. The pin is inserted through a hole in the screw itself, and between the slots of the nut, which creates a locked, vibration-resistant fastening.


These components can be manufactured from A2 and A4 Stainless Steel. Chemical Black Coatings can also be applied on request.

Metric Thin Castle Nuts

Thin Castle Nuts are compliant with DIN 937, and are available in metric thread diameters from M6 up to M30. Widths range from 10.00mm to 55.00mm (A/F), and lengths are available from 3.50mm up to 11.00mm.

Shipping Information

Shipping Destinations:Worldwide.
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Weight Band (100 items):Between 1kg and 5kg. Add to cart to calculate exact weights.

Component History

Product First Available:Sunday, June 28, 2015
Stock Last Updated:12:04 pm
Sunday, September 19, 2021
Specification Last Updated:Sunday, September 19, 2021

APC / Barcodes

APC (Accu Product Code):HCTFN-M16-A4
EAN13 (International Article No.):5054328317796
ASIN (Amazon Stock Identification No.):ASIN not defined.