Description
Monster Overview
Fix your project right the first time with SAE Flat Washers – Medium Carbon Thru-Hardened, Plain Finish from Monster Bolts. These USA-made SAE pattern washers feature a smaller outside diameter than USS washers and are ideal for machinery, automotive, equipment assembly, fabrication, and industrial applications.
Manufactured from medium carbon thru-hardened steel, these washers deliver a durable, consistent bearing surface under bolt heads and nuts. The plain (uncoated) finish is suitable for controlled environments or for assemblies that will receive additional coatings (paint, plating, etc.). As with all Monster Bolts plain carbon and steel finishes, these washers are fully RoHS compliant.
Monster Features
- SAE Pattern: Smaller OD for tighter assemblies compared to USS washers.
- Medium Carbon Thru-Hardened: Increased hardness and durability for demanding fastener joints.
- Finish: Plain (uncoated) for versatile use and post-treatment applications.
- RoHS Compliant: Plain finish is fully RoHS compliant.
- System: Inch / SAE sizes matched to standard bolt diameters.
- Made in USA: Reliable domestic manufacturing and consistent quality.
- Bulk Quantities: Ideal for industrial users, maintenance shops, and fabrication facilities.
Monster Specifications
| Specification | Details |
|---|---|
| Washer Type | SAE Flat Washer (narrow OD) |
| Material | Medium carbon steel, thru-hardened |
| Finish | Plain (uncoated steel), RoHS compliant |
| Pattern | SAE – smaller OD than USS style |
| System of Measurement | Inch / SAE |
| Country of Origin | Made in USA |
| RoHS Compliance | Plain finish is RoHS compliant |
| Sizes Available | Available in common SAE washer sizes; select washer diameter and bulk quantity above. |
More Monster Products
Matching Hardware: Pair these washers with our USA-made bolts and nuts in matching plain or project-coated finishes. Browse the full Made in USA Fasteners Collection to find compatible hardware.
Order Yours Today
Upgrade your assemblies with reliable USA-Made SAE Flat Washers in medium carbon thru-hardened steel and a flexible plain finish. Choose your washer size and bulk quantity above, then click “Add to Cart” to stock up with Monster Bolts.


