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Engineering Reference Handbook

Bus Bars Washers - C Shaped
Clamps and Brackets Washers - Centering
Expansion Plugs Washers - Countersunk
Grounding Straps Washers - Finishing
Insulators Washers - Flat
Jumpers Washers - Lock
Retaining Rings Washers - Odd Shaped ID
Sheet Metal Nuts and Strips Washers - Odd Shaped OD
Solder Lugs Washers - Retaining
Spacers Washers - Retention
Spring Clips Washers - Shoulder
Tags Washers - Split
Washers - Spring
Washers - Tab, Key, and Notch
Washers - Terminal Cup


Tab, Key, & Notch Washers

Tab Lock Washers

Definition: Tab lock washers are designed to prevent both the washer and the nut from rotating in an assembly. The tabs lock over the edge of the assembly base or in a predrilled hole. The ears are bent up by the user to lock the nut in place.

Tab Lock Washers are available in the following materials and finishes:

  • Cold Rolled Steel (Steel): Black Oxide, Cadmium types I & II, Chrome, Degreasing, Bright Nickel, Pickling, Phosphate, Silver, Bright Tin, Hot Tin Dip, and Zinc types I & II
  • Stainless Steel 301-304: Black Oxide, Cadmium types I & II, Chrome, Degreasing, Bright Nickel, Passivate, Pickling, Silver, Bright Tin, Hot Tin Dip, and Zinc types I & II

Tab Lock Washer: 5748
Tab Lock Washer: 5749
Tab Lock Washer: 5745 - Style 1
Tab Lock Washer: 5745 - Style 2

Example: Tab Lock Washer

     



     

The tabs of the Tab Lock Washer hold the nut in place in relation to the chassis.



Tab washer

Definition: Tab washers are available with a wide variety of both internal and external tab configurations. The tabs prevent the washer from rotating under the bolt or in relation to a shaft. The internal tabs prevent shaft rotation, whole external tabs can lock into holes or over the edge of the assembly base.

Tab Washers are available in the following materials and finishes:

  • Cold Rolled Steel (Steel): Black Oxide, Cadmium types I & II, Chrome, Degreasing, Bright Nickel, Pickling, Phosphate, Silver, Bright Tin, Hot Tin Dip, and Zinc types I & II

Internal Tab Formed Key Washer: 5739
Single Internal Tab Washer: 5746
Double Internal Tab Washer: 5747
Single External Tab Washer: 5741
Single Internal-External Tab Washer: 5744
Multiple External-Internal Tab Washer: 5743
Multiple External Tab Washer: 5742-Style 1 (2 Tabs)
Multiple External Tab Washer: 5742-Style 2 (4-23 Equally Spaced Tabs)
Multiple External Tab Washer: 5742-Style 3 (7 Unevenly Spaces Tabs)

Example: Tab Washer



Formed tab prevents washer from rotating or used as a stop.



Internal-External tab washer prevents nut from loosening.



Prevents shaft from turning.



Key Washer

Definition: Formed key washers are designed to lock into the base material or assembly with the external key to prevent the washer’s rotation. The internal tab prevents the shaft from rotating.

Formed Key Washers are available in the following materials and finishes:

  • Cold Rolled Steel (Steel): Black Oxide, Cadmium types I & II, Chrome, Degreasing, Bright Nickel, Pickling, Phosphate, Silver, Bright Tin, Hot Tin Dip, and Zinc types I & II
  • Stainless Steel 301-304: Black Oxide, Cadmium types I & II, Chrome, Degreasing, Bright Nickel, Passivate, Pickling, Silver, Bright Tin, Hot Tin Dip, and Zinc types I & II

Internal Tab Formed Key Washer: 5739
Formed Key Washer: 5740

Example: Formed Key Washer



Notch Washer

Definition: Notch washers are designed with both internal and external notches depending on their application. Notch washers are generally used with a key to prevent the rotation of the washer relative to the shaft.

Notch Washers are available in the following materials and finishes:

  • Cold Rolled Steel (Steel): Black Oxide, Cadmium types I & II, Chrome, Degreasing, Bright Nickel, Pickling, Phosphate, Silver, Bright Tin, Hot Tin Dip, and Zinc types I & II
  • Stainless Steel 301-304: Black Oxide, Cadmium types I & II, Chrome, Degreasing, Bright Nickel, Passivate, Pickling, Silver, Bright Tin, Hot Tin Dip, and Zinc types I & II

Single Internal Notch Washer: 5750
Single Internal Notch Washer: 5752
Double Internal Notch Washer: 5751
Single External Notch Washer: 5753
Double External Notch Washer: 5754

Example: Notch Washer


Key locks shaft into washer and prevents it from turning.