Hubbard, M. D., Spring Co., Inc. - Hubbard (Welch Type) Expansion Plugs
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Hubbard (Welch Type) Expansion Plugs
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Expansion Plugs

larger image 		Original patent holder and manufacturer of the Welch Expansion Plug since 1913, M.D. Hubbard offers the widest range of sizes anywhere -- from 1/8"diameter up to 6"diameter. Expansion plugs and cupped plugs are an inexpensive, efficient, permanent method of closing/sealing manufactured holes in casting and other processes. Expansion plugs with a ground edge are available for applications requiring an exceptional degree of holding power or leak resistance.

Standard Materials:

• Steel: SAE1008/1010 low carbon steels ASTM#A1089 or A569 depending on gage.
• Aluminum: 1100H14 to ASTM#B209.
• Stainless Steel: type 302 to ASTM#A177 or type 430 to ASTM#A176.
• Brass to ASTM#B36.
• Customer specific materials different than those listed above are commonly run.

Finish:

• Steel: provided plain finish with a light oil. Expansion plugs can be provided with a wide range of coatings: mechanical zinc (processed in house), electro-zinc, black oxide.
• Aluminum: provided plain finish. Aluminum plugs are washed in a light mineral spirit in order to remove any solvents or residue.
• Stainless Steel: Provided plain finish. Stainless Steel plugs are washed in a light mineral spirit in order to remove any solvents or residue. Stainless plugs can be passivated.
• Brass: provided plain finish. Brass plugs are washed in a light mineral spirit in order to remove any solvents or residue.


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Item #

Nominal O.D.-A

Diameter Limits-D

Spherical Radius- R

Thickness

Material

List Price

HP-748-S-62 .748 Inch .751/.745 Inch 11/16 Inch .062 Inch Steel QUOTE
HP-197-B-12 .197 Inch .198/.196 Inch .167 Inch .012 Inch Brass QUOTE
HP-197-A-12 .197 Inch .198/.196 Inch .167 Inch .012 Inch Aluminum QUOTE
HP-197-S-12 .197 Inch .198/.196 Inch .167 Inch .012 Inch Steel QUOTE
HP-166-S-12 .166 Inch .167/.165 Inch 5/32 Inch .012 Inch Steel QUOTE
HP-166-A-12 .166 Inch .167/.165 Inch 5/32 Inch .012 Inch Aluminum QUOTE
HP-166-B-12 .166 Inch .167/.165 Inch 5/32 Inch .012 Inch Brass QUOTE
HP-281-B-32 9/32 Inch .282/.280 Inch 9/32 Inch .032 Inch Brass QUOTE
HP-281-A-32 9/32 Inch .282/.280 Inch 9/32 Inch .032 Inch Aluminum QUOTE
HP-281-S-32 9/32 Inch .282/.280 Inch 9/32 Inch .032 Inch Steel QUOTE
HP-125-A-25 1/8 Inch .127/.124 Inch 7/64 Inch .025 Inch 1100-H14 Aluminum QUOTE
HP-125-B-25 1/8 Inch .127/.124 Inch 7/64 Inch .025 Inch Brass QUOTE
HP-125-S-25 1/8 Inch .127/.124 Inch 7/64 Inch .025 Inch Steel QUOTE
HP-125-S-32 1/8 Inch .127/.124 Inch 7/64 Inch .032 Inch Steel QUOTE
HP-156-A-22 5/32 Inch .158/.154 Inch 5/32 Inch .022 Inch 1100-H14 Aluminum QUOTE
HP-156-A-25 5/32 Inch .158/.154 Inch 5/32 Inch .025 Inch 1100-H14 Aluminum QUOTE
HP-156-S-49 5/32 Inch .158/.154 Inch 5/32 Inch .049 Inch Steel QUOTE
HP-187-A-20 3/16 Inch .189/.186 Inch 11/64 Inch .020 Inch 1100-H14 Aluminum QUOTE
HP-187-B-20 3/16 Inch .189/.186 Inch 11/64 Inch .020 Inch Brass QUOTE
HP-187-A-25 3/16 Inch .189/.186 Inch 11/64 Inch .025 Inch 1100-H14 Aluminum QUOTE
HP-187-B-25 3/16 Inch .189/.186 Inch 11/64 Inch .025 Inch Brass QUOTE
HP-187-S-25 3/16 Inch .189/.186 Inch 11/64 Inch .025 Inch Steel QUOTE
HP-187-A-32 3/16 Inch .189/.186 Inch 11/64 Inch .032 Inch 1100-H14 Aluminum QUOTE
HP-187-B-32 3/16 Inch .189/.186 Inch 11/64 Inch .032 Inch Brass QUOTE
HP-187-S-32 3/16 Inch .189/.186 Inch 11/64 Inch .032 Inch Steel QUOTE
  Results 1 - 25 of 510 1 2 3 4 5 »  

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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