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 7
- Approved Vendor M20 Class 10 Hardened Flat Washers Zinc SKU 27066 $0.51
- Approved Vendor M20 Class 10 Internal Tooth Lock Washers Zinc Clear SKU 29146 $0.74
- Approved Vendor M20 Class 12 High Collar Split Lock Washer Plain SKU 29149 $0.49
- Approved Vendor M20 Split Lock Washers Plain SKU 29155 $0.67
- Approved Vendor M3 A4-70 Stainless Steel Flat Washers SKU 5960 $0.05
- Approved Vendor M3 Class 10 Hardened Flat Washers Zinc SKU 27207 $0.01
- Approved Vendor M3 Split Lock Washers Plain SKU 29157 $0.01
- Approved Vendor M4 A4-70 Stainless Steel Flat Washers SKU 5961 $0.06
- Approved Vendor M4 Class 10 Hardened Flat Washers Plain SKU 27466 $0.01
- Approved Vendor M4 Class 10 Hardened Flat Washers Zinc SKU 26877 $0.01
- Approved Vendor M4 Class 12 High Collar Split Lock Washer Plain SKU 29154 $0.02
- Approved Vendor M4 Split Lock Washers Zinc SKU 27168 $0.01
- Approved Vendor M4x12x1.0 A4-70 Stainless Steel Fender Washers SKU 5943 $0.10
- Approved Vendor M5 A4-70 Stainless Steel Flat Washers SKU 5962 $0.06
- Approved Vendor M5 A4-70 Stainless Steel Split Lock Washers SKU 6128 $0.08
- Approved Vendor M5 Class 10 Hardened Flat Washers Plain SKU 27003 $0.02
- Approved Vendor M5 Class 10 Hardened Flat Washers Zinc SKU 26735 $0.02
- Approved Vendor M5 Class 10 Internal Tooth Lock Washers Zinc Clear SKU 29148 $0.03
- Approved Vendor M5 Class 12 High Collar Split Lock Washer Zinc Clear SKU 29153 $0.05
- Approved Vendor M5 Split Lock Washers Zinc SKU 27033 $0.04
- Approved Vendor M5x15x1.2 A4-70 Stainless Steel Fender Washers SKU 5944 $0.13
- Approved Vendor M5x15x1.2 Grade A Flat Fender Washers Zinc SKU 27206 $0.05
- Approved Vendor M6 A4-70 Stainless Steel Flat Washers SKU 5963 $0.10
- Approved Vendor M6 A4-70 Stainless Steel Split Lock Washers SKU 6129 $0.11
- Approved Vendor M6 Brass Flat Washers SKU 27465 $0.26
- Approved Vendor M6 Class 10 Hardened Flat Washers Plain SKU 26729 $0.03
- Approved Vendor M6 Class 10 Hardened Flat Washers Zinc SKU 26660 $0.03
- Approved Vendor M6 Class 10 Hardened Flat Washers Zinc Yellow SKU 26684 $0.04
- Approved Vendor M6 Class 12 High Collar Split Lock Washer Plain SKU 29152 $0.03
- Approved Vendor M6 Flat Washer 16MM OD Zinc SKU 32411 $1.00
- Approved Vendor M6 Flat Washer 19MM OD Zinc SKU 32410 $1.00
- Approved Vendor M6 Flat Washer 22MM OD Zinc SKU 32409 $1.00
- Approved Vendor M6 Flat Washer 25MM OD Zinc SKU 32408 $1.00
- Approved Vendor M6 Split Lock Washers Plain SKU 27065 $0.04
- Approved Vendor M6 Split Lock Washers Zinc SKU 26683 $0.04
- Approved Vendor M6 Split Lock Washers Zinc Yellow SKU 26835 $0.05
- Approved Vendor M6-1.0x16mm Hex Head Sems Bolts, 17mm Washer, Black Fluorocarb SKU 27411 $1.28
- Approved Vendor M6-1.0x35mm Hex Head SEMS Body Bolt, Type CA, 17mm Washer, Black Phosphate SKU 29123 $1.50
- Approved Vendor M6x18x1.6 A4-70 Stainless Steel Fender Washers SKU 5945 $0.23
- Approved Vendor M6x18x1.6 Grade A Flat Fender Washers Zinc SKU 26733 $0.09
- Approved Vendor M6x18x1.6 Grade C Flat Fender Washers Zinc SKU 27048 $0.12
- Approved Vendor M7 Class 10 Hardened Flat Washers Zinc SKU 27228 $0.04
- Approved Vendor M8 A4-70 Stainless Steel Flat Washers SKU 5964 $0.19
- Approved Vendor M8 A4-70 Stainless Steel Split Lock Washers SKU 6130 $0.22
- Approved Vendor M8 Brass Flat Washers SKU 27310 $0.49
- Approved Vendor M8 Class 10 Hardened Flat Washers Plain SKU 26704 $0.05
- Approved Vendor M8 Class 10 Hardened Flat Washers Zinc SKU 26659 $0.04
- Approved Vendor M8 Class 10 Hardened Flat Washers Zinc Yellow SKU 26668 $0.06