SAE flat washers are precision-sized washers manufactured to Society of Automotive Engineers (SAE) dimensional standards. Compared to USS washers, SAE washers feature a smaller outside diameter and tighter dimensional profile, making them ideal for automotive, equipment, and controlled assembly applications.
Offshore Milling & Sourcing supports bulk and factory-direct sourcing programs for SAE flat washers, serving distributors, OEM manufacturers, automotive suppliers, and industrial procurement teams requiring consistent dimensional accuracy and scalable supply.
We provide container-based programs, recurring volume schedules, and secondary supplier strategies aligned with cost control and lead-time stability.
Specifications
- Standard: SAE (Society of Automotive Engineers)
- Dimensional Reference: ANSI / ASME B18.21.1
- Inside Diameter: Sized to standard bolt diameters
- Outside Diameter: Smaller OD than USS washers
- Thickness: Standard SAE thickness profile
- Fit Type: Closer tolerance fit than USS
- Configuration: Flat washer (hardened options available upon request)
SAE vs USS Washer Comparison
| Feature | SAE Flat Washer | USS Flat Washer |
|---|---|---|
| Outside Diameter | Smaller | Larger |
| Application Fit | Controlled assemblies | General industrial |
| Common Industries | Automotive / OEM | Construction / Structural |
This dimensional difference is critical for engineered assemblies requiring precise load distribution and limited footprint.
Materials
- Low Carbon Steel
- Hardened Carbon Steel
- Stainless Steel 304
- Stainless Steel 316
- Alloy Steel (special applications)
Finish & Coating Options
- Zinc Plated
- Plain Finish
- Black Oxide
- Hot-Dip Galvanized
- Mechanical Galvanized
- Stainless Steel (Corrosion Resistant)
- Custom Coatings Available
Finish selection is driven by environmental exposure and application requirements.
Dimensional & Variation Capabilities
We support a wide range of SAE washer configurations:
- Standard bolt-matching diameters
- Hardened SAE washers
- Precision thickness variations
- Custom OD and ID per print
- Private label packaging
- Mixed SKU container programs
Industries Served
- Automotive Manufacturing
- Equipment OEMs
- Agricultural Machinery
- Industrial Equipment
- Metal Fabrication
- MRO Distribution
- Heavy Equipment Assembly
Applications
- Engine assemblies
- Equipment mounting
- Machinery fastening systems
- Automotive bolt assemblies
- Controlled-load fastening applications
SAE flat washers are commonly paired with hex bolts, machine bolts, and cap screws in precision assembly environments.
Strategic Sourcing Capabilities
Washers are often bundled with bolt and nut programs in bulk container imports.
Offshore Milling & Sourcing supports:
- Factory-direct bulk programs
- Container consolidation with bolts and nuts
- Secondary supplier sourcing
- Volume-based pricing models
- Lead-time stabilization
- Recurring scheduled imports
We frequently assist distributors and OEMs seeking cost efficiency and reliable multi-SKU sourcing programs.
Volume & Packaging Options
- Bulk cartons
- Palletized shipments
- Mixed container programs
- Custom-labeled packaging
- Scheduled recurring imports
Request a Quote
To request SAE flat washer pricing, please provide:
- Bolt size / inside diameter
- Material
- Finish requirement
- Hardened or standard
- Quantity
- Delivery timeline
Specification sheets and drawings may be uploaded with your RFQ.
