Hex Bolts & Flange Bolts
Hex head, flange and socket head bolts in property classes 8.8 and 10.9, in plain, zinc plated, hot-dip galvanised and zinc-flake finishes. Sizes run from M6 to M24, with metric, UNC and UNF threads.
Also searched as: hex bolts bulk, hex bolt supplier, flange bolts wholesale, class 10.9 bolts, DIN 6921
1 ready part number here, each with photos, dimensions, fitment, packing and a quote form.
What decides the price
In order of impact8.8 and 10.9 are not a quality grade, they are a strength class. Using 8.8 where 10.9 was specified reduces the preload the joint can hold.
Zinc flake costs more than electroplating and survives salt spray far longer. On outdoor or underbody joints the coating is the deciding cost.
Metric, UNC, UNF, BSP and NPT are not interchangeable. A quote that does not state the standard is not a quote.
Worth checking before you order
A 8.8 bolt in a 10.9 joint does not fail politely. It stretches, the joint loosens, and the failure shows up somewhere else.
A DIN 6921 flange bolt and an ANSI flange bolt differ in head and flange diameter. They are not drop-in replacements.
Selection data
Confirmed per orderReady part numbers
Photos and specs per lineQuestions
Can you supply test reports?+
Mill certificates come with the steel. Mechanical property reports come from the factory when it tests, and we pass on what we are given.
What is the minimum order?+
2,000 pieces per size for standard items. Non-standard and specials are quoted per drawing.
Send the specification, not the product name.
Grade, size, thread standard and coating are what a quote is built from. A product name alone produces a price that changes twice before the order.