Content with Delta Coating
04 January 2017
Washer size
Bolt Size NL8
M8 NL10
M10 NL12
M12 NL16
M16 NL20
M20 NL22
M22 NL24
M24 NL27
M27 NL30
M30 NL36
M26 Internal diameter
(id) 8.7
(+/-) 0.1 10.7
(+/-) 0.5 13.0
(+/-) 0.5 17.0
(+/-) 0.5 21.4
(+/-) 0.5 23.4
(+/-) 0.5 25.3
(+/-) 0.5 28.4
(+/-) 0.5 31.4
(+/-) 0.5 37.4
(+/-) 0.5 Outside diameter
(od) 13.5
(+/-) 0.2 16.6
(+/-) 0.2 19.5
(+/-) 0.2 25.
Read more about Nord-lock washers - Dimensions for popular sizes of steel washers ↬
Read more about Nord-lock washers - Dimensions for popular sizes of steel washers ↬
25 August 2015
Self Colour / Black Finish Finish Specification S/C
Self Colour Bare / Blackened (Black Oxide)
Lightly Oiled products are supplied in a black finish with a light covering of oil Hot Dip Galvanised (HDG) Finish Specification HDG
Hot Dip Galvanised EN ISO 10684
EN 1461
BS 7371-6 heavy coating deposits of molten zinc (40-180 microns) suitable for long term corrosion protection; a thicker coating deposit gives a longer life expectancy; it is most suitable for structural steelwork; the coating will affect the thread fit and assembly of fasteners due to the non-uniformity of the coating and the average coating thickness of 50-80 microns; in general the fullnuts are tapped oversize after the plating to allow for this but in some cases the bolt threads are undersize prior to coating; high temperature may affect the metallurgical properties of high tensile metals, i.
Read more about Finished (Plating) ↬
Read more about Finished (Plating) ↬