Hubbard, M. D., Spring Co., Inc. - Hubbard Plugs Ground
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Hubbard Plugs Ground
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Ground Plugs

larger image 		The ground expansion plug offers the greatest level of holding power or leak resistance available in an expansion plug. The ground edge provides maximum contact surface area and the finest surface finish.
To maximize effect, the counter bore should receive special finishing.
A second operation on the hole and a ground finish on the edge of a Hubbard Plug will produce the maximum effectiveness possible.
We grind the edge circumferentially to a high finish, and segregate the parts when packing to prevent damage to the edge during shipment. For greatest protection ground edge Hubbard Plugs should be kept in their packing containers up to the point of assembly.
Ground Plugs, installed in a correctly prepared counter bore, should eliminate the need for sealer and should hold highly penetrating liquids.
While their cost is higher than standard Hubbard Plugs, they are less expensive than pipe plugs or other closures when considering the total cost including tapping.

Standard Materials:

• Steel: SAE1008/1010 low carbon steels to ASTM #A109 or A569 depending on gage.
• Stainless Steel: type 302 to ASTM#A177 or type 430 to ASTM#A176.
• Brass to ASTM#B36.
• Customer specific materials diffferent than those listed above can be run.

Finish:

• All ground plugs are packaged in segregated rows with a special light oil finish.

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Item #

Nominal O.D.-A

Diameter Limits-D

Spherical Radius- R

Thickness

Material

List Price

HPG-625-S-62 5/8 Inch .628/.622 Inch 3/4 Inch .062 Inch Steel QUOTE
HPG-625-B-62 5/8 Inch .628/.622 Inch 3/4 Inch .062 Inch Brass QUOTE
HPG-685-S-62 .685 Inch .688/.682 Inch 7/8 Inch .062 Inch Steel QUOTE
HPG-685-B-62 .685 Inch .688/.682 Inch 7/8 Inch .062 Inch Brass QUOTE
HPG-750-S-62 3/4 Inch .753/.747 Inch 15/16 Inch .062 Inch Steel QUOTE
HPG-750-B-62 3/4 Inch .753/.747 Inch 15/16 Inch .062 Inch Brass QUOTE
HPG-875-S-83 7/8 Inch .878/.872 Inch 1 3/32 Inch .083 Inch Steel QUOTE
HPG-875-B-83 7/8 Inch .878/.872 Inch 1 3/32 Inch .083 Inch Brass QUOTE
HPG-937-S-83 15/16 Inch .940/.934 Inch 1 5/32 Inch .083 Inch Steel QUOTE
HPG-937-B-83 15/16 Inch .940/.934 Inch 1 5/32 Inch .083 Inch Brass QUOTE
HPG-1000-S-83 1 Inch 1.003/.997 Inch 1 1/8 Inch .083 Inch Steel QUOTE
HPG-1000-B-83 1 Inch 1.003/.997 Inch 1 1/8 Inch .083 Inch Brass QUOTE
HPG-1125-S-83 1 1/8 Inch 1.128/1.122 Inch 1 3/8 Inch .083 Inch Steel QUOTE
HPG-1125-B-83 1 1/8 Inch 1.128/1.122 Inch 1 3/8 Inch .083 Inch Brass QUOTE
HPG-1155-S-83 1.155 Inch 1.157/1.151 Inch 1 1/2 Inch .083 Inch Steel QUOTE
HPG-1155-B-83 1.155 Inch 1.157/1.151 Inch 1 1/2 Inch .083 Inch Brass QUOTE
HPG-1168-S-83 1.168 Inch 1.171/1.165 Inch 1 1/2 Inch .083 Inch Steel QUOTE
HPG-1168-B-83 1.168 Inch 1.171/1.165 Inch 1 1/2 Inch .083 Inch Brass QUOTE
HPG-1187-S-83 1 3/16 Inch 1.190/1.184 Inch 1 1/2 Inch .083 Inch Steel QUOTE
HPG-1187-B-83 1 3/16 Inch 1.190/1.184 Inch 1 1/2 Inch .083 Inch Brass QUOTE
HPG-1250-S-83 1 1/4 Inch 1.253/1.247 Inch 1 5/8 Inch .083 Inch Steel QUOTE
HPG-1250-B-83 1 1/4 Inch 1.253/1.247 Inch 1 5/8 Inch .083 Inch Brass QUOTE
HPG-1363-S-83 1.363 Inch 1.366/1.360 Inch 1 13/16 Inch .083 Inch Steel QUOTE
HPG-1363-B-83 1.363 Inch 1.366/1.360 Inch 1 13/16 Inch .083 Inch Brass QUOTE
HPG-1375-S-83 1 3/8 Inch 1.380/1.370 Inch 1 13/16 Inch .083 Inch Steel QUOTE
  Results 1 - 25 of 58 1 2 3 

M.D. Hubbard Spring Company  
595 S. Lapeer Rd., Box 425T • Oxford, MI 48371
Ph: 248-628-2528 • Fax: 248-628-7734

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