KD Fasteners, Inc.® carries Hex Nuts in various steel and other materials. Hex nut size refers to its nominal thread diameter. The sizes usually range from 1/4" to about 2 1/2" but we can cater to any of your custom needs. Grade 2 is the lowest, in terms of both strength and cost; Grade 5 offers medium strength, and Grade 8 is the highest SAE grade and is usually priced the highest as well. Never replace a graded hex nut with a lower grade or lower strength nut and keep in mind that surface markings identify the grade.

Hex Nut

We specialize in the following Hex Nut Materials:

Grade 2, 5, and 8 in plain, zinc, zinc yellow, black oxide and other types of plating
Metric Din 934 and 439B (8.8, 10.9, 12.9 A2 and A4 stainless)
Nylon
Stainless steel (18-8 and 316)
Brass
Silicon Bronze
Aluminum
Jam nuts (similar to hex nuts but has a smaller thickness)
2H A194
A563 (grade C and DH)
Exotic Materials (Titanium, Hastalloy, and special grades of stainless)
Heavy Hex Nuts:

Plain
Zinc
Zinc yellow
Hot Dipped Galvanized