Hex bolt diameter is measured on the outside of the threads. Resources. Metric hex bolt sizes (opens in new window/tab) Allen or hex head drive metric stainless steel bolts grade 18.8 with coarse thread. Metric hex bolts ; Hex bolts . A bolt with a six sided head. Stainless steel 18-8 (A-2) Also known as A-2 stainless , 18-8 is heremon grade of stainless steel for general use.

Stainless Steel Fasteners are our Specialty! Stainless steel is our specialty. We make stainless steel fasteners accessible and affordable. We stock and offer: TIME-SERT Thread Repair. License Plate Fasteners. Metric Nuts. Metric Washers. Hex Bolts class 8.8. Hex Bolts class 10.9. Hex Bolts class 12.9. Small Wrench JIS Bolts 8.8 hereplete Line of stainless steel hardware, stainless steel bolts , stainless steel washers, stainless steel screws, stainless steel tubing, stainless steel fasteners, street rod parts, stainless steel exhaust, and stainless steel muffler clamps.

Inch. 18-8 , which can be 302, 303 or 304 stainless , refers to 18% chromium and 8% nickel content. 316 is more corrosion resistant than 18-8 because it contains molybdenum, but in inch fasteners both have the same tensile strength. Monster Bolts is your top choice for both metric nuts and US sizing. Shop now for a great selection of nuts, screws, bolts , sealed electrical connectors and fasteners online. Boltmasters reputation is for quality, service and innovation of Bolts Fasteners. These include stainless steel rivets, nuts screws.

Over 15,000 High Grade Nuts and Bolts Northeast Fasterers stocks over 15,000 types of fasteners. Our in stock selection includes many grades of nuts, bolts , screws, washers and assortments with most shipping the same or next business day.