TABLE 7

Imperial mild steel round washers are flat, low-carbon steel washers sized in fractional inches to accompany traditional imperial thread forms like UNC, UNF, BSW (Whitworth), and BSF.

These are categorised according to BS 3410 where washers are divided into specific tables that govern their dimensional scope and intended utility:

  • Table 7 Series: Explicitly designated as "Regular Sized Black Washers" with wide tolerances. They are manufactured with significantly more generous hole clearances and heavier thickness profiles to support structural engineering, civil layout projects, and heavy equipment assemblies.
TABLE 7