Silicon Bronze Flat Head Machine Screw/Bolt
Bronze CSK Machine Screws
Silicon Bronze Machine Screws
  • Load image into Gallery viewer, Silicon Bronze Flat Head Machine Screw/Bolt
  • Load image into Gallery viewer, Bronze CSK Machine Screws
  • Load image into Gallery viewer, Silicon Bronze Machine Screws

Flat Head Silicon Bronze Machine Screws / Bolts

Regular price
Sale price
Regular price
Sold out
Unit price
Shipping calculated at checkout.

Solid 651 Silicon Bronze Flat Head Countersunk Machine Screws with a Slotted Drive

These machine bolts have a flat, countersunk (CSK) head. You can also find bronze oval head machine bolts or round head machine bolts at our store.

Our Silicon Bronze Machine Screws, often referred to as Machine Bolts, are the highest quality available, made of a solid 651 Silicon Bronze Alloy, and manufactured to meet ASME B18.6.3 standards. These fasteners are often used as bolts with nuts on the end or can be driven in to tapped holes. All of the Machine Screws we carry come with a slotted drive. These flat headed machine bolts have a countersunk (CSK) head, with a standard 82 degree angle on the countersink.

4" lengths and less are fully threaded with rolled threads, while lengths over 4" are partially threaded with full body shanks and cut threads.

We carry one of the largest selections of solid bronze machine screws in the USA. Use them in your boat building application to attach bronze hardware, in your electrical application since bronze is such a good conductor, or in any application where the highly anti-corrosive nature combined with the beauty of bronze is fitting.

We do things a bit differently here at Fair Wind Fasteners. Rather than force you to purchase an entire box of fasteners you can put the exact quantity you need in the quantity box above and we'll box and send the perfect amount. Quantity discounts will be automatically applied.

Customer Reviews

Based on 105 reviews
Superior Quality Bronze

As Usual, Fair Winds delivered a superior product in a speedy fashion. I needed some bronze bolts in order to secure my motor mount on my transom. Worked great and looks good too.

Great Service

Always quick to ship and great service- very responsive over phone as well

Great Service

Items delivered quickly as advertised.


As described. Fast delivery

Thad Van Gilder
flat head silicon bronze machine screws

As a boatbuilder, I have purchased silicon bronze fasteners from a great variety of sources over the last 30 years. My experience with fairwind fasteners has been so positive that I am fairly certain I will not be purchasing marine fasteners anywhere else as long as they are in business.