EFC International
EFC International
1940 Craigshire St. Louis,
MO 63146-4008
Phone: 1 314.434.28881
Contact: www.efc-intl.com/contact
Website: www.efc-intl.com
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Concave Bottom Cup-Type Expansion Plugs seal by pressure exerted by the concave bottom against the walls of the plug. They are made standard from Carbon Steel and are available in 24 sizes, ranging from 3/8" - 3" in Nominal Diameter. (Brass, Aluminum and Galvanized Steel are also available. Please contact EFC International directly for information).
Unit of Measure

Specifications

Material

 N/A Heavy Duty Galvanized Steel

Maximum Crown Height

 N/A 0.167 in

Minimum Crown Height

 N/A 0.111 in

Maximum Hole Diameter

 N/A 3.004 in

Minimum Hole Diameter

 N/A 3 in

Nominal Diameter (Decimal)

 N/A 3 in

Maximum Overall Height

 N/A 0.54 in

Minimum Overall Height

 N/A 0.48 in

Maximum Outside Diameter

 N/A 3.013 in

Minimum Outside Diameter

 N/A 3.01 in

Steel Thickness

 N/A 0.074 in

Finish

Finish

 N/A G90

Features and Benefits

Features and Benefits

 N/A For insertion, they should be driven on the inside bottom radius, and not from the top rim of the cup. The driving arbor should be 0.015/0.025" smaller than the ID of the plug, with a flat bottom to prevent contact with the concave bottom to prevent deforming this surface.
Concave Bottom