AN960C Washer Specifications

Washer Size Inner Diameter (ID) Outer Diameter (OD) Thickness
#2 C2 0.099" 1/4", 0.25" 1/32", 0.0313"
#2 C2L 0.099" 1/4", 0.25" 1/64", 0.015625" (Light)
#3 C3 0.109" 1/4", 0.25" 1/32", 0.21875"
#3 C3L 0.109" 1/4", 0.25" 1/64", 0.015625" (Light)
#4 C4 0.125" 0.312" 1/32", 0.03125"
#4 C4L 0.125" 0.312" 1/64", 0.015625" (Light)
#5 C5 0.140" 0.438" 3/64", 0.046875"
#6 C6 0.149" 0.375" 1/32", 0.03125"
#6 C6L 0.149" 0.375" 1/64", 0.015625" (Light)
#8 C8 0.174" 0.375" 1/32", 0.03125"
#8 C8L 0.174" 0.375" 1/64", 0.015625"
#10 C10 0.203" 0.437" 1/16", 0.0625"
#10 C10L 0.203" 0.437" 1/32", 0.03125" (Light)
1/4" C416 0.265" 0.500" 1/16", 0.0625"
1/4" C416L 0.265" 0.500" 1/32", 0.03125" (Light)
5/16" C516 0.328" 0.562" 1/16", 0.0625"
5/16" C516L 0.328" 0.562" 1/32", 0.03125" (Light)
3/8" C616 0.390" 0.625" 1/16", 0.0625"
3/8" C616L 0.390" 0.625" 1/32", 0.03125" (Light)
7/16" C716 0.453" 0.750" 1/16", 0.0625"
7/16" C716L 0.453" 0.750" 1/32", 0.03125" (Light)
1/2" C816 0.516" 0.875" 1/16", 0.0625"
1/2" C816L 0.516" 0.875" 1/32", 0.03125" (Light)
9/16" C916 0.578" 1.062" 1/16", 0.0625"
9/16" C916L 0.578" 1.062" 1/32", 0.03125" (Light)
5/8" C1016 0.641" 1.187" 1/16", 0.0625"
5/8" C1016L 0.641" 1.187" 1/32", 0.03125" (Light)
3/4" C1216 0.766" 1.312" 3/32", 0.09375"
3/4" C1216L 0.766" 1.312" 1/32", 0.03125" (Light)
7/8" C1416 0.890" 1.500" 3/32", 0.09375"
1" C1616 1.016" 1.750" 3/32", 0.09375"

Stainless Steel Extra Thick Flat Washer Specifications

Washer Sizes Inner Diameter (ID) Outer Diameter (OD) Thickness
1/4" 9/32" 5/8", Max 0.630" - Min 0.5625" Max 0.125" - Min 0.100"
5/16" 11/32" 3/4", Max 0.760" - Min 0.700" Max 0.125" - Min 0.100"
1/2" 17/32" 1-1/4", Max 1.252" - Min 1.248" Max 0.125" - Min 0.100"
1/2" 17/32" 1-1/2", Max 1.500" - Min 1.4375" Max 0.125" - Min 0.100"

NAS Washer Specifications

Washer Size Inner Diameter (ID) Outer Diameter (OD) Thickness
#0 Max 0.063" - Min 0.060" Max 0.099" - Min 0.090" Max 0.016" - Min 0.013"
#2 Max 0.089" - Min 0.085" Max 0.149" - Min 0.140" Max 0.016" - Min 0.013"
#3 Max 0.102" - Min 0.093" Max 0.180" - Min 0.150" Max 0.032" - Min 0.026"
#4 Max 0.115" - Min 0.105" Max 0.208" - Min 0.200" Max 0.032" - Min 0.026"
#5 Max 0.128" - Min 0.118" Max 0.238" - Min 0.228" Max 0.032" - Min 0.026"
#6 Max 0.143" - Min 0.133" Max 0.267" - Min 0.257" Max 0.032" - Min 0.026"
#6L Max 0.143" - Min 0.133" Max 0.267" - Min 0.257" Max 0.016" - Min 0.013" (Light)
#8 Max 0.169" - Min 0.160" Max 0.304" - Min 0.296" Max 0.032" - Min 0.026"
#8L Max 0.169" - Min 0.160" Max 0.304" - Min 0.296" Max 0.016" - Min 0.013" (Light)
#10 Max 0.195" - Min 0.189" Max 0.354" - Min 0.325" Max 0.063" - Min 0.058"
#10L Max 0.195" - Min 0.189" Max 0.354" - Min 0.325" Max 0.032" - Min 0.028" (Light)
#416 Max 0.255" - Min 0.245" Max 0.468" - Min 0.458" Max 0.063" - Min 0.058"
#416L Max 0.255" - Min 0.245" Max 0.468" - Min 0.458" Max 0.032" - Min 0.028" (Light)

Black Chrome Plated Steel Flat Washers

Steel Flat Washers with a Sleek and Protective Black Chrome Plated Finish

A chrome plated steel flat washer is a round outer diameter plate with a hole in the center punched to the size of the bolt or screw size. Additionally, Flat Washers may be used to provide ease of movement for spinning parts, or when the hole holding the fastener assembly is larger than the finishing nut. Black chrome plated steel flat washers are made of steel with a shiny black chrome plating to provide superior corrosion resistance to the washer while also providing a shiny, decorative finish.

Chrome Plated Steel Flat Washers

Steel Flat Washers with a Decorative and Protective Chrome Plated Finish

A chrome plated steel flat washer is a round outer diameter plate with a hole in the center punched to the size of the bolt or screw size. Additionally, Flat Washers may be used to provide ease of movement for spinning parts, or when the hole holding the fastener assembly is larger than the finishing nut. Chrome plated steel flat washers are made of steel with a shiny chrome plating to provide superior corrosion resistance to the washer while also providing a shiny, decorative finish.

Conical Belleville Washers

Vibration Reducing Washers used to Add Pre-Load

Belleville washers (also called Belleville Washers, Disc Springs, Spring Washers, Conical Washers, Cupped Spring Washers, or Conical Spring Washers) are used to add a layer of vibration resistance and pre load to a bolt assembly. The conical shape applies a spring force against the bottom of the bolt head to help prevent accidental loosening after installation. Belleville washers can be stacked below a bolt head to add more force to the assembly if needed. Conical washers are commonly used in the automotive and machinery industries.

Stainless Steel Belleville Conical Washer Configurations

For more information on Conical Washers read our What Are Belleville Washers Blog Post.

Flat Washers - Standard

Round Washers in a Variety of Materials and Finishes

A flat washer is a round outer diameter thin ring with a center hole (inner diameter) punched to a size just larger than a bolt or screw. Flat washers are normally used to distribute loads of threaded bolts, screws and nuts evenly as the fastener is tightened. While there are many types of flat washers standard are the most commonly used.

Standard Washers are available in 304 Stainless Steel, 316 Stainless Steel, Black Oxide 18-8 Stainless Steel, Brass, Hot Dip Galvanized, Silicon Bronze and Zinc.

Not sure what material you need? Check out our Material Guide to find the right material for your needs!

Metric Fender Washers

Flat Washers with a Larger Outside Diameter - Metric Sizes

Fender Washers are used to prevent pull-though and provide a greater weight bearing surface under the fastener. This prevents nuts, bolts or screws from pulling through base material. Metric fender Washers are distinguished from standard flat washers by their significantly larger outside Diameter (or OD), which creates a larger surface area on the fastener assembly, allowing it to withstand more force. Fender Washers are commonly used to distribute load force on sheet metal, and gain their name from the use on car fenders. Due to their large size they are also used to allow fasteners to connect where rust or damage has made the hole bigger.

Not sure what material you need? Check out our Material Guide to find the right material for your needs!

Trade Names: Penny Washer, Repair Washer

Metric Washers

Metric Sized Flat Washers, Lock Washers & more in different materials & finishes for use in a variety of applications

Metric washers are available in quality grade A2 Stainless Steel. Metric flat washers, metric fender washers, metric lock washers, metric external tooth lock washers, metric internal tooth lock washers, and metric high collar lock washers are available and always in stock. Metric A2 Stainless Steel is corrosion resistant and rust resistant.

A2 Stainless Steel Metric Washers

Stainless Steel Metric sized Washers in A2 Stainless Steel offer the Fastener Industry standard for corrosion and rust resistance in Metric Fasteners, and are recommended for use in exterior applications, or those that are exposed to fresh water moisture.

Nut and Washer Assortment Kits

Assorted Size Runs of Matching Nuts and Washers

Nut and Washer kits in stainless steel or brass come in a wide variety of types and sizes. These kits come in a durable metal box, or a heavy duty plastic compartment box, depending upon the kit's size. A simple nut and washer does not fit the requirements for every application. That is why these kits are designed with both generic and specialty varieties.

We know having variety is amazing when you know what your looking for. Unsure of what you need? Check our resources below!

Phillips Pan Head SEMS Screws - External Tooth Lock Washer

Machine Screws with Free-Spinning Star Lock Washers

Phillips Pan Head SEMS with External Tooth Lock Washers are essentially a pre-assembled machine screw with lock washer. The lock washer is beneath the head of the screw and is free-spinning. This pre-assembly saves time and hassle on production lines and in any application where a machine screw with lock washer may be necessary, since they do not need to be put together, and there is no need to worry about losing a screw or washer. External Tooth SEMS screws provide greater torsional resistance than internal tooth lock washers. Because of the integrated lock washer, SEMS screws are often referred to as lock screws, or locking screws.

Phillips Pan Head SEMS Screws - Internal Tooth Lock Washer

Machine Screws with Free-Spinning Lock Washers

Phillips Pan Head SEMS screws in this selection are essentially a machine screw with a pre-assembled internal tooth lock washer. The lock washer is free spinning and sits below the head of the screw. SEMS screws are valued for saving time on production lines, and the hassle of losing matching parts. Internal Tooth SEMS screws are often used over other styles of locking screws when the locking teeth need to be hidden for appearance, or there is a chance of external locking mechanisms snagging.

Square Washers

Plate and Beveled Square Washers

Square washers are washers with a greater resistance to movement than a regular washer once fastened. Due to their larger surface area, more contact can help to hold the washer in place. Commonly used to limit the effect of vibration from loosening a fastener assembly. Square washers are similar to fender washers but have a much larger profile and feature a square shape.

Square washers are shown to function better in earthquakes and are recommended for buildings where seismic activity is likely. Regular washers had a higher pull-though and split rate in this type of application making square washers the optimal choice.

Trade Names: Square Plate Washers

Grade 8 Extra Thick Flat Washer Specifications

Washer Sizes Inner Diameter (ID) Outer Diameter (OD) Thickness
1/4" 9/32" (0.281") 5/8" (0.625") Max 0.125" - Min 0.100"
5/16" 0.344" 0.688" Max 0.125" - Min 0.100"
7/16" 0.469" 0.922" Max 0.125" - Min 0.100"
1/2" 0.531" 1.062" Max 0.125" - Min 0.100"
9/16" 19/32" (0.594") 1-5/32" (1.156") 3/16" (0.1875")
5/8" 21/32" (0.656") 1-5/16" (1.3125") 3/16" (0.1875")
3/4" 13/16" (0.8125") 1-15/32" (1.469") 3/16" (0.1875")
7/8" 15/16" (0.9375") 1-3/4" (1.75") 3/16" (0.1875")
1" 1-1/16" (1.0625") 2" 1/4" (0.25")

Zinc Plated Steel Flat Washers

Steel Flat Washers with a Protective Zinc Plated Finish

A zinc plated steel flat washer is a round outer diameter plate with a hole in the center punched to the size of the bolt or screw size. Additionally, Flat Washers may be used to provide ease of movement for spinning parts, or when the hole holding the fastener assembly is larger than the finishing nut. Zinc plated steel flat washers are made of steel with a zinc plating to protect the fastener from environmental damage and increase durability

All Zinc Plated Fasteners from Albany County Fasteners are REACH and RoHS Compliant