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E-Style External Retaining Ring, Tapered Section, Radial Assembly, 15-7 PH Stainless Steel, Passivated Finish, 1/4" Shaft Diameter, 0.025" Thick, Made in US (Pack of 25)

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Product Specifications
Compatible Groove Depth
0.02  inches
Compatible Groove Dia.
0.210  inches
Compatible Groove Width
0.029  inches
Compatible with OD
1/4  inches
For Shaft Diameter
Indentation Hardness
63 rockwell_30N
Inside Diameter
0.207  inches
Inside Diameter Tolerance
+0.001"/-0.003  inches
Item Shape
E Style
Outside Diameter
0.527  inches
Pkg Qty
0.025  inches
Thickness Tolerance
+0.002"/-0.002  inches
Specification for this product family (See all  products)
Material Type
Stainless Steel
Part Number
Body Style
Brand Name
Small Parts
Manufacturer Series Number
Exterior Finish
Installation Method
Style Name
Tapered Section
Import Designation
Made in US
System of Measurement

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Key Features

  • E-style shape connects with the shaft in three places for retention
  • Tapered section construction provides flexibility to facilitate installation
  • Ring installs radially by sliding onto the shaft from the side
  • 15-7 PH stainless steel offers high strength and hardness, and maintains its corrosion resistance in high temperatures, and the passivated finish enhances its natural corrosion resistance
  • Made in USA

Package Details

Shipping Weight: 0.01 pounds
Package Size: 3 x 2 x 0.2 inches

Product Description

The E-style external retaining ring has a tapered section, assembles radially, is made of passivated 15-7 PH stainless steel, and is made in USA. The ring's E-style shape has three points of contact with the shaft for retention when installed. The tapered section style provides the ring with flexibility to facilitate installation and typically withstands higher thrust loads than constant section and spiral rings. The ring installs by sliding it onto a shaft from the side, also called radial assembly. Often used when the shaft end is not reachable, radial assembly rings enable quicker installation than axially installed rings but may require deeper grooves. The 15-7 PH stainless steel grade offers high strength and hardness, and maintains its corrosion resistance in high temperatures, and the passivated finish enhances its corrosion resistance of stainless steel.

Retaining rings attach to a shaft (external) or install in a bore (internal), creating a shoulder to maintain component positioning within an assembly. While most rings install into a machined groove either on the inside or outside diameter of a shaft, self-locking rings attach to a shaft by using friction from means such as teeth and notches to maintain placement. Retaining rings should fit tightly enough into the groove or onto the shaft so they won't experience any movement.

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