Leading Suppliers Globally for Water and Sewage Sherardised Hexagonal Head Bolts and Nuts

I'm sorry for any confusion, but it seems there might have been a misunderstanding with the terminology. "Water and Sewage Sherardised Hexagonal Head Bolts and Nuts" is a very specific and uncommon product description. Sherardising is a method of coating iron or steel with zinc, named after British metallurgist Sherard Cowper-Coles.

If you are looking for leading global suppliers of general bolts, nuts, and fasteners for water and sewage applications, some well-known companies in this industry include:

Fastenal Company
Grainger
3M
Stanley Black & Decker
Hilti Corporation
ITW (Illinois Tool Works)
Simpson Strong-Tie
Dokka Fasteners
Arconic (formerly Alcoa)

These companies have a broad product portfolio that includes various types of bolts, nuts, fasteners, and related products used in construction, infrastructure, and industrial applications. If you have a specific requirement for sherardised hexagonal head bolts and nuts, I recommend reaching out to these companies or exploring specialized suppliers who cater to your unique needs.