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This modified geometry is often referred to as heavy hex geometry. [8] Nuts must meet ASTM A563, which also uses heavy hex geometry. [9] Dimensions of heavy hex geometry are per document ANSI/ASME B18.2.6, which uses "coarse" threads as defined by Unified Thread Standard.
This standard defines property classes, the metric equivalent of a screw grade, that are almost identical to those defined by ISO 898-1, [2] except for the addition of the 8.8.3 and 10.9.3 classes. These two additional standards are fasteners that have the same mechanical properties as their base property class (i.e. 8.8 and 10.9), but are made ...
Steel fasteners (grade 2,5,8) - the level of strength; Stainless steel fasteners (martensitic stainless steel, austenitic stainless steel), Bronze and brass fasteners - water proof usage; Nylon fasteners - used for the light material and water proof usage. In general, steel is the most commonly used material of all fasteners: 90% or more. [8]
Hexagon slotted nuts and castle nuts with metric coarse and fine pitch thread – Product grades A and B: Active: DIN 935-2: M42 to M160x6 hexagon head nuts; product grade B: Active: DIN 935-3: Hexagon slotted nuts with metric coarse pitch thread – Product grade C: Active: DIN 936: M8 to M52 and M8x1 to M52x3 hexagon thin nuts; product grades ...
6. (Now withdrawn) Nuts with specified proof load values – Fine pitch thread [7] 7. Torsional test and minimum torques for bolts and screws with nominal diameters 1 mm to 10 mm [8] With exception to part 7, which defines test standards, the parts of this standard define properties for fasteners made of carbon steel and alloy steel.
Just be aware that the tolerable upper intake level of selenium is about 400 mcg and Brazil nuts contain 68–91 mcg per nut. Try not to exceed three nuts per day (because they are so large, 1–2 ...