Flat Washers F436 SAE Structural Yellow Zinc Plated A325 A490 (ALL SIZES)

Flat Washers F436 SAE Structural Yellow Zinc Plated A325 A490 (ALL SIZES)

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Description
Description
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🔩 Flat Washers F436 SAE Structural Yellow Zinc Plated – A325/A490 (ALL SIZES)

Description for eCommerce:

F436 Structural Flat Washers are engineered for high-strength bolted connections used in structural steel joints. These washers meet SAE J429 and ASTM F436 specifications and are typically paired with A325 or A490 heavy hex structural bolts and nuts. They are made of through-hardened, heat-treated steel for superior strength and durability under heavy loads. The yellow zinc plating adds a corrosion-resistant finish, enhancing longevity in outdoor or exposed environments while maintaining easy identification on job sites.

These washers feature a larger outer diameter than standard USS washers, ensuring optimal load distribution over structural steel members. Their use is essential in critical applications like bridges, buildings, and heavy machinery.

  • Material: Hardened Medium Carbon Steel (through-hardened per ASTM F436)

  • Coating: Yellow Zinc Plated (for moderate corrosion resistance)

  • Compatible Bolts: ASTM A325 & A490

  • Standards: SAE J429, ASTM F436 Type 1

  • Applications: Structural steel, heavy construction, industrial installations

📊 Size & Strength Chart: F436 SAE Structural Yellow Zinc Flat Washers

Washer Size (Bolt Size) Inside Diameter (in) Outside Diameter (in) Thickness (in) Hardness (HRC) Tensile Strength (psi)
1/2" 9/16 1-3/8 0.136 – 0.177 38 – 45 100,000 – 150,000
5/8" 11/16 1-3/4 0.136 – 0.177 38 – 45 100,000 – 150,000
3/4" 13/16 2 0.136 – 0.177 38 – 45 100,000 – 150,000
7/8" 15/16 2-1/4 0.177 – 0.220 38 – 45 100,000 – 150,000
1" 1-1/16 2-1/2 0.177 – 0.220 38 – 45 100,000 – 150,000
1-1/8" 1-3/16 2-3/4 0.177 – 0.220 38 – 45 100,000 – 150,000
1-1/4" 1-5/16 3 0.177 – 0.220 38 – 45 100,000 – 150,000
1-3/8" 1-7/16 3-1/4 0.177 – 0.220 38 – 45 100,000 – 150,000
1-1/2" 1-9/16 3-1/2 0.177 – 0.220 38 – 45 100,000 – 150,000

📌 Notes:

  • Hardness requirement (38–45 HRC) ensures resistance to deformation under preload from structural bolts.

  • Thickness tolerances are governed by ASTM F436; slight variations may exist by manufacturer.

  • These washers are non-ductile and not intended to bend or deform—used purely to maintain bolt tension and integrity.

Shipping & Return
Shipping & Return
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Returns are easy: Simply contact us for a return, replacement, refund, or any questions you may have about the item you received and we will help you through the process quick and easy. Refund Policy Shipping: Most items ship out within 1 business day. Ship to USA only.