Bulk F436 Structural Flat Washers – Plain Finish, Inch Sizes, Made in USA – Monster Bolts

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Monster Overview Fix your project right the first time with F436 Structural Flat Washers – Plain Finish from Monster Bolts. These USA-made structural washers are manufactured to AS TM F436 and built for demanding high-strength bolted connections in structural steel, construction, bridge work, and heavy equipment. F436 structural flat washers provide a hardened, reliable bearing surface under bolt heads and nuts, helping distribute load and protect connection materials from damage during tightening and service. The plain (uncoated) finish is ideal for controlled environments or for applications where parts will receive project-level coatings (paint, galvanizing, or other treatments). As with Monster Bolts’ other plain steel fasteners, these washers are fully RoHS compliant. Monster Features Structural Grade: Manufactured to ASTM F436 structural washer specifications. Washer Type: Structural flat washer for high-strength bolted joints. Finish: Plain (uncoated) hardened steel for maximum flexibility in project finishing. RoHS Compliant: Plain hardened steel finish is fully RoHS compliant. System: Inch-series sizes matched to common structural and heavy hex bolt diameters. Made in USA: Domestic production for consistent quality, specification compliance, and traceability. Bulk Quantities: Perfect for fabricators, contractors, and industrial users stocking structural hardware bins. Monster Specifications Specification Details Washer Type F436 Structural Flat Washer Standard ASTM F436 (structural washers) Finish Plain (uncoated hardened steel) Material Hardened steel per ASTM F436 requirements System of Measurement Inch / SAE Country of Origin Made in USA RoHS Compliance Plain hardened steel is RoHS compliant Sizes Available Offered in common F436 structural washer sizes; select washer diameter and bulk quantity from the options above. More Monster Products Matching Hardware: Pair these F436 structural flat washers with our USA-made structural bolts, heavy hex nuts, and other plain-finish or project-coated fasteners. Explore the Made in USA Fasteners Collection to find compatible hardware. Order Yours Today Equip your structural connections with USA-Made F436 Structural Flat Washers in a versatile plain finish. Select your washer size and bulk quantity above, then click “Add to Cart” to stock your shop or jobsite with reliable structural washers from Monster Bolts. { "@context": "https://schema.org", "@type": "Product", "name": "Bulk F436 Structural Flat Washers – Plain Finish, Inch Sizes, Made in USA – Monster Bolts", "description": "USA-made F436 structural flat washers with plain finish. RoHS-compliant inch-series structural washers for structural steel, construction, bridges, and heavy-duty industrial applications.", "brand": { "@type": "Brand", "name": "Monster Bolts" }, "manufacturer": { "@type": "Organization", "name": "Monster Bolts Inc." }, "material": "Hardened steel, ASTM F436 structural washer", "countryOfOrigin": "US", "additionalProperty": [ { "@type": "PropertyValue", "name": "Washer Type", "value": "F436 Structural Flat Washer" }, { "@type": "PropertyValue", "name": "Finish", "value": "Plain (uncoated hardened steel)" }, { "@type": "PropertyValue", "name": "System of Measurement", "value": "Inch / SAE" }, { "@type": "PropertyValue", "name": "RoHS Compliant", "value": "Yes" } ], "image": { "@type": "ImageObject", "url": "https://cdn.shopify.com/s/files/1/1818/5247/files/Monster_Bolts_website_SEO_Image.jpg?v=1755614615", "contentUrl": "https://cdn.shopify.com/s/files/1/1818/5247/files/Monster_Bolts_website_SEO_Image.jpg?v=1755614615", "creditText": "Monster Bolts", "creator": { "@type": "Organization", "name": "Monster Bolts Inc." }, "copyrightNotice": "Copyright © {{ 'now' | date: '%Y' }} Monster Bolts Inc. All Rights Reserved", "acquireLicensePage": "https://monsterbolts.com/pages/image-licensing", "license": "https://monsterbolts.com/pages/image-licensing" } } Show more