Washers

300+ products

Expected delivery: Wed, Nov 18

Washers spread the load under a bolt head or nut, protect the surface, and in some cases help keep a joint tight or sealed. This section covers SAE and USS flat washers, hardened flat washers, fender washers, split lock washers, internal and external tooth lock washers, bonded sealing washers with a rubber backing, and nylon washers. Materials include zinc-plated and plain steel, hardened steel, galvanized steel, stainless steel and nylon.

What to check before you order

SAE or USS pattern. SAE flat washers have a smaller outside diameter and a closer fit on the bolt. USS washers are larger and thicker, a common choice for wood and construction work.
Hardness. High-strength bolts such as Grade 8 should use hardened flat washers so the washer does not dish under load.
Fender washers. Their large outside diameter spreads load on thin sheet metal, plastic and slotted holes.
Sealing. Bonded sealing washers are used on roofing and siding screws and on fittings where water or fluid must be kept out.
Material match. Use stainless washers with stainless bolts to avoid corrosion between metals.

Shop matching nuts and hex bolts and cap screws, or see all fasteners.

Common questions

What size washer do I need for a 1/2 in. bolt?

Washers are sold by the nominal bolt size they fit, so a 1/2 in. bolt takes a 1/2 in. washer, which has a slightly larger hole than the bolt. The SAE or USS pattern then sets the outside diameter and thickness.

Where does a split lock washer go?

Place a split lock washer directly under the nut or screw head that is being turned. If a flat washer is also used, the flat washer sits against the part and the lock washer goes between it and the nut or head.

Washers: page 6

Approved Vendor M10 A4-70 Stainless Steel Flat Washers SKU 5965 $0.33
Approved Vendor M10 A4-70 Stainless Steel Split Lock Washers SKU 6131 $0.33
Approved Vendor M10 Brass Flat Washers SKU 27419 $0.97
Approved Vendor M10 Class 10 Hardened Flat Washers Zinc SKU 26658 $0.11
Approved Vendor M10 Class 10 Hardened Flat Washers Zinc Yellow SKU 26667 $0.10
Approved Vendor M10 Split Lock Washers Plain SKU 27015 $0.10
Approved Vendor M10 Split Lock Washers Zinc SKU 26670 $0.09
Approved Vendor M10 Split Lock Washers Zinc Yellow SKU 26763 $0.11
Approved Vendor M10x30x2.5 A4-70 Stainless Steel Fender Washers SKU 5947 $1.16
Approved Vendor M10x30x2.5 Grade A Flat Fender Washers Zinc SKU 26939 $0.34
Approved Vendor M10x30x2.5 Grade C Flat Fender Washers Zinc SKU 27464 $0.51
Approved Vendor M12 A4-70 Stainless Steel Flat Washers SKU 5966 $0.59
Approved Vendor M12 A4-70 Stainless Steel Split Lock Washers SKU 6132 $0.46
Approved Vendor M12 Class 10 Hardened Flat Washers Plain SKU 26780 $0.15
Approved Vendor M12 Class 10 Hardened Flat Washers Zinc SKU 26662 $0.19
Approved Vendor M12 Class 10 Hardened Flat Washers Zinc Yellow SKU 26678 $0.16
Approved Vendor M12 Split Lock Washers Plain SKU 27189 $0.16
Approved Vendor M12 Split Lock Washers Zinc SKU 26680 $0.18
Approved Vendor M12 Split Lock Washers Zinc Yellow SKU 26792 $0.18
Approved Vendor M12x37x3.0 A4-70 Stainless Steel Fender Washers SKU 5948 $2.06
Approved Vendor M12x37x3.0 Grade A Flat Fender Washers Zinc SKU 27105 $0.62
Approved Vendor M12x37x3.0 Grade C Flat Fender Washers Zinc SKU 27334 $0.91
Approved Vendor M14 A4-70 Stainless Steel Flat Washers SKU 5967 $0.81
Approved Vendor M14 A4-70 Stainless Steel Split Lock Washers SKU 6133 $0.65
Approved Vendor M14 Brass Flat Washers SKU 29159 $2.02
Approved Vendor M14 Class 10 External Tooth Lock Washers Zinc Clear SKU 29145 $0.31
Approved Vendor M14 Class 10 Hardened Flat Washers Plain SKU 26981 $0.23
Approved Vendor M14 Class 10 Hardened Flat Washers Zinc SKU 26697 $0.26
Approved Vendor M14 Class 10 Hardened Flat Washers Zinc Yellow SKU 26712 $0.25
Approved Vendor M14 Class 12 High Collar Split Lock Washer Zinc Clear SKU 29151 $0.22
Approved Vendor M14 Split Lock Washers Zinc SKU 26938 $0.24
Approved Vendor M14 Split Lock Washers Zinc Yellow SKU 27167 $0.25
Approved Vendor M14x44x3.0 Grade A Flat Fender Washers Zinc SKU 27418 $0.77
Approved Vendor M16 A4-70 Stainless Steel Flat Washers SKU 5968 $1.03
Approved Vendor M16 A4-70 Stainless Steel Split Lock Washers SKU 6134 $0.97
Approved Vendor M16 Brass Flat Washers SKU 29158 $2.64
Approved Vendor M16 Class 10 Hardened Flat Washers Plain SKU 27190 $0.28
Approved Vendor M16 Class 10 Hardened Flat Washers Zinc SKU 26734 $0.33
Approved Vendor M16 Class 10 Hardened Flat Washers Zinc Yellow SKU 26851 $0.31
Approved Vendor M16 Class 10 Internal Tooth Lock Washers Zinc Clear SKU 29147 $0.31
Approved Vendor M16 Class 12 High Collar Split Lock Washer Plain SKU 29150 $0.22
Approved Vendor M16 Split Lock Washers Zinc SKU 27166 $0.32
Approved Vendor M16 Split Lock Washers Zinc Yellow SKU 27333 $0.41
Approved Vendor M18 Class 10 Hardened Flat Washers Zinc SKU 27311 $0.39
Approved Vendor M18 Split Lock Washers Plain SKU 29156 $0.39
Approved Vendor M20 A4-70 Stainless Steel Flat Washers SKU 5969 $1.57
Approved Vendor M20 A4-70 Stainless Steel Split Lock Washers SKU 6135 $1.95
Approved Vendor M20 Class 10 External Tooth Lock Washers Zinc Clear SKU 29144 $0.72