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
Print Back
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 0.075 in

Minimum Crown Height

 N/A 0.049 in

Maximum Hole Diameter

 N/A 0.381 in

Minimum Hole Diameter

 N/A 0.379 in

Nominal Diameter (Decimal)

 N/A 0.375 in

Maximum Overall Height

 N/A 0.208 in

Minimum Overall Height

 N/A 0.168 in

Maximum Outside Diameter

 N/A 0.387 in

Minimum Outside Diameter

 N/A 0.385 in

Steel Thickness

 N/A 0.042 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