Shop USA Flat Washers Online at South Coast Fasteners

South Coast Fasteners, Inc. supplies USA flat washers that are thru hardened for strength and reliability in demanding assemblies. Thru hardening improves durability and load-bearing capacity, ensuring washers can perform under high torque and heavy clamping forces without deforming.

Industries such as construction, energy, transportation, and heavy equipment rely on USA thru hardened flat washers for use with high-strength bolts and nuts. From structural steel frameworks to machinery and infrastructure projects, these washers provide the stability and protection needed to keep bolted connections secure.

Get the Best Prices on Premium USA-Made Products from South Coast Fasteners

South Coast Fasteners, Inc. proudly carries a wide selection of USA made products from heavy duty fasteners to professional grade tools, all crafted to support construction, automotive, and industrial applications. To complete your setup, do not miss the SAS Safety® Raven Patriot Gloves, recognized nationwide as the best nitrile gloves available. Built for both strength and flexibility, these gloves alongside our full line of American made products give you the power to take on every project with reliability.

Types of USA Flat Washers (Thru Hardened)

USS Flat Washers (USA)

Available in plain, zinc CR+3, and zinc yellow CR+6 finishes, USA USS flat washers are larger in diameter and designed to distribute load over a wide area. They are widely used in construction, heavy machinery, and structural assemblies.

SAE Flat Washers (USA)

Supplied in plain, zinc CR+3, and zinc yellow CR+6 finishes, USA SAE flat washers have a smaller outside diameter compared to USS washers. They are used in automotive, machinery, and applications requiring tighter tolerances.

USA F436 Structural Flat Washers

Available in plain, zinc CR+3, and hot dip galvanized finishes, USA F436 structural washers meet ASTM standards for use with structural bolts such as A325 and A490. They are specified in bridges, towers, and steel frameworks where code compliance is required.

USA Extra Heavy Flat Washers

These washers, supplied in zinc yellow CR+6 finish, provide additional thickness and strength for high-load assemblies. USA extra heavy flat washers are used in heavy equipment, construction, and energy infrastructure projects.

USA Metric Flat Washers

Made to ASME B18.22M standards, USA metric flat washers are available in narrow styles with thru hardened construction. Offered in zinc CR+3 finishes, they are trusted in global machinery and equipment assemblies where metric fasteners are required.

USA Flat Washers - Material Options

South Coast Fasteners stocks USA thru hardened flat washers in multiple standards and grades to match industry requirements.

USS Standard

USA USS flat washers provide wide load distribution and are common in heavy construction and industrial applications.

SAE Standard

USA SAE flat washers offer tighter dimensions and are widely used in automotive and machinery applications.

F436

USA F436 washers are thru hardened structural washers designed for use with high-strength bolts in structural steel connections.

Metric

USA metric flat washers meet ASME B18.22M standards and are essential for equipment built to metric specifications.

USA Flat Washers - Available Finishes

South Coast Fasteners offers USA flat washers (thru hardened) in a curated range of finishes designed to improve durability and meet environmental requirements.

Plain

USA plain thru hardened washers are untreated and cost-effective, suited for indoor or controlled environments.

Zinc CR+3

USA zinc CR+3 washers have a silver finish that provides corrosion resistance. They are commonly used in plumbing, machinery, and general assemblies.

Yellow Zinc CR+6

USA yellow zinc CR+6 washers offer a gold-tone finish and enhanced corrosion protection. They are popular in automotive, electrical, and equipment assemblies.

Hot Dip Galvanized

USA hot dip galvanized washers are coated in thick zinc for long-lasting protection. They are widely used in outdoor, marine, and infrastructure projects.

Microchrome Plating (MCAL)

USA washers with microchrome plating (MCAL) provide excellent corrosion resistance with a smooth, durable finish. This finish is commonly used in precision, transportation, and energy applications.

Why Choose South Coast Fasteners?

South Coast Fasteners is trusted for USA thru hardened flat washers because we stock a wide range of types, sizes, and finishes to match demanding applications. Customers across construction, transportation, and manufacturing depend on our washers to meet industry standards and project requirements, delivered with speed and accuracy.

Shop USA Flat Washers (Thru Hardened) Online at South Coast Fasteners

Order USA thru hardened flat washers today from South Coast Fasteners and complete your assemblies with confidence. With options in USS, SAE, F436, extra heavy, and metric washers across multiple finishes, we make it easy to source exactly what your project requires. Bulk ordering, fast turnaround, and certification support are available to keep your work moving forward.