Low Carbon Steel Flat Washers - General-Purpose Flat Washers

Low carbon steel flat washers are the most widely used washers in industrial and commercial fastener assemblies, providing economical load distribution, vibration resistance, and surface protection. Superior Washer & Gasket Corp manufactures steel flat washers in a comprehensive range of standard sizes and produces custom steel washers to your dimensional requirements.

Our ISO 9001:2015 certified flat washer manufacturing ensures consistent quality across all carbon steel washer orders. We maintain broad inventory of steel flat washers for fast delivery and offer zinc-plated, hot-dip galvanized, and other surface finish options-all made in the U.S.A.

Low carbon steel for general-purpose load distribution
Comprehensive standard size inventory in stock
Custom steel flat washers available
Multiple surface finish options
ISO 9001:2015 certified; made in the U.S.A.

Showing 101–150 of 4,975 products

SKU	ID	OD	Thickness	Material	ID TOL	OD TOL	Quantity
650-1118-020	ID 0.187	OD 0.5	Thickness 0.02	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1119-032	ID 0.187	OD 0.506	Thickness 0.032	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1120-003	ID 0.187	OD 0.545	Thickness 0.003	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1121-060	ID 0.187	OD 0.625	Thickness 0.06	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1122-060	ID 0.187	OD 0.687	Thickness 0.06	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1123-040	ID 0.187	OD 0.751	Thickness 0.04	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1124-005	ID 0.188	OD 0.28	Thickness 0.005	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1125-031	ID 0.188	OD 0.311	Thickness 0.031	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1126-032	ID 0.188	OD 0.388	Thickness 0.032	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1127-010	ID 0.188	OD 0.406	Thickness 0.01	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1128-075	ID 0.188	OD 0.438	Thickness 0.075	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1129-088	ID 0.188	OD 0.501	Thickness 0.088	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1130-032	ID 0.188	OD 0.616	Thickness 0.032	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1131-076	ID 0.188	OD 0.621	Thickness 0.076	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1132-061	ID 0.189	OD 0.313	Thickness 0.061	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1133-056	ID 0.189	OD 0.341	Thickness 0.056	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1134-096	ID 0.189	OD 0.375	Thickness 0.096	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1135-040	ID 0.189	OD 0.378	Thickness 0.04	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1136-040	ID 0.189	OD 0.393	Thickness 0.04	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1137-045	ID 0.189	OD 0.437	Thickness 0.045	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1138-032	ID 0.189	OD 0.467	Thickness 0.032	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1139-032	ID 0.189	OD 0.494	Thickness 0.032	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1140-118	ID 0.189	OD 0.5	Thickness 0.118	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1141-056	ID 0.189	OD 0.623	Thickness 0.056	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1142-061	ID 0.189	OD 0.625	Thickness 0.061	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1143-042	ID 0.189	OD 0.748	Thickness 0.042	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1144-028	ID 0.189	OD 0.75	Thickness 0.028	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1150-010	ID 0.19	OD 0.252	Thickness 0.01	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1151-015	ID 0.19	OD 0.283	Thickness 0.015	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1152-015	ID 0.19	OD 0.294	Thickness 0.015	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1153-032	ID 0.19	OD 0.301	Thickness 0.032	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1154-032	ID 0.19	OD 0.306	Thickness 0.032	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1155-010	ID 0.19	OD 0.31	Thickness 0.01	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1156-031	ID 0.19	OD 0.313	Thickness 0.031	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1157-015	ID 0.19	OD 0.326	Thickness 0.015	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1158-024	ID 0.19	OD 0.339	Thickness 0.024	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1159-030	ID 0.19	OD 0.343	Thickness 0.03	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1160-060	ID 0.19	OD 0.355	Thickness 0.06	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1161-060	ID 0.19	OD 0.359	Thickness 0.06	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1162-014	ID 0.19	OD 0.364	Thickness 0.014	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1163-020	ID 0.19	OD 0.368	Thickness 0.02	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1164-060	ID 0.19	OD 0.375	Thickness 0.06	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1165-016	ID 0.19	OD 0.376	Thickness 0.016	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1166-040	ID 0.19	OD 0.378	Thickness 0.04	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1167-040	ID 0.19	OD 0.38	Thickness 0.04	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1168-031	ID 0.19	OD 0.386	Thickness 0.031	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1169-051	ID 0.19	OD 0.392	Thickness 0.051	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1170-020	ID 0.19	OD 0.394	Thickness 0.02	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1171-072	ID 0.19	OD 0.398	Thickness 0.072	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity
650-1172-024	ID 0.19	OD 0.401	Thickness 0.024	Material Steel Low Carbon	ID TOL +-.005	OD TOL +-.005	Quantity

Low Carbon Steel Flat Washer Frequently Asked Questions

Below are answers to some of the most common questions about low carbon steel flat washers.

What are low carbon steel flat washers?
Low carbon steel flat washers are manufactured from low carbon steel (typically 1008 through 1020 grade), the most common and economical washer material for general-purpose fastener applications. Low carbon steel offers good formability, consistent dimensional quality, and adequate strength for the vast majority of industrial, construction, and mechanical assembly applications.

What finishes are available for low carbon steel flat washers?
Low carbon steel is susceptible to corrosion and is typically supplied with a protective finish. Common finishes include zinc plating (clear or yellow), hot-dip galvanizing, phosphate and oil, black oxide, and plain (oiled). For corrosive environments, zinc plating or stainless steel is recommended. Contact us to specify your finish requirement.

What is the difference between low carbon steel and mild steel washers?
The terms are essentially interchangeable. Mild steel and low carbon steel both refer to steels with a carbon content generally below 0.30%, most commonly in the 1008-1020 range for washer applications. Both terms describe the same class of material.

Can you make custom low carbon steel flat washers?
Yes. Superior Washer manufactures custom low carbon steel washers to your OD, ID, and thickness specifications, in a wide range of finishes. Contact us via the Quick Quote form or by phone.

Are your low carbon steel flat washers made in the USA?
Yes. All low carbon steel flat washers are manufactured in the United States under our ISO 9001:2015 certified Quality Management System. Material certifications are available upon request.

Low carbon steel is our most economical general-purpose washer material. Browse the full flat washers catalog to see all materials available for your application.