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Hoffman (Pentair)  /  AS300

Hoffman AS300 3 OT KO SEAL


SE Part Number: 71720

UPC:  78351059780

Part Number: AS300

UNSPSC: 39121311

Status:  STOCK

Country of Origin:  Mexico

Your Price:  $44.00 / ea
Qty  eaAdd to Cart View Cart Checkout


Total Availabile: 164 ea

Availability By Branch

  • Springfield, IL42 ea
  • Bloomington, IL1 ea
  • Champaign, IL9 ea
  • East Peoria, IL5 ea
  • Danville, IL10 ea
  • Mt. Vernon, IL1 ea
  • Mattoon, IL8 ea
  • Peru, IL8 ea
  • Rockford, IL1 ea
  • Decatur, IL9 ea
  • Moline, IL4 ea
  • Carbondale, IL8 ea
  • Davenport, IA10 ea
  • Edwardsville, ILB/O or Special Order
  • Decatur - CorporateB/O or Special Order
  • East Peoria - CorporateB/O or Special Order
  • Quincy, IL12 ea
  • Hannibal, MO11 ea
  • Evansville, IN16 ea
  • Vincennes, IN9 ea
  • Terre Haute, INB/O or Special Order


  • Seal extra pushbutton holes, conduit openings and knockout openings against dust, dirt, oil and water with Hoffman HOLSEALERS™ . Seals will cover any size or shape of hole from .19-in. diameter to maximum diameter shown in table. Can be used on enclosure walls up to .31-in. (8-mm) thick.


  • Steel seals have polyester powder paint finish over galvanized front surface.
  • Stainless steel seals have polished front surface.
  • Steel Models:
  • 16 gauge galvanized steel backplate
  • Plated stud (10-32x5/8) and wing nut
  • Stainless Steel Models:
  • 16 gauge stainless steel backplate
  • Seal, backplate, stud (10-24x5/8) and wing nut are 300 series stainless steel
  • Available in multiple colors and sizes
  • Oil-resistant gasket provided


  • Industry Standards: Steel Hole Seals UL 508A Component Recognized; Type 3R, 4, 12, 13; File No. E61997 CSA File No. 42186; Type 3R, 4, 12, 13 NEMA/EEMAC Type 3R, 4, 12, 13 IEC 60529, IP66 Stainless Steel Hole Seals UL 508A Component Recognized; Type 3R, 4, 4X, 12, 13; File No. E61997 CSA File No. 42186; Type 3R, 4, 4X, 12, 13 NEMA/EEMAC Type 3R, 4, 4X, 12, 13 IEC 60529, IP66
  • Bulletin Number: A80HS
  • Material: Steel
  • Model Code: 59780
  • Ship Wt. Std. Pkg. (lbs): 6.0
  • Interchangeable: False
  • Finish Color: ANSI 61 gray

Technical Data

  • For: 3-in. conduit holes
  • Maximum Hole Diameter in.: 3.62
  • Hol-Sealer Diameter in.: 4.12
Time Zone 

Alternative Product Disclaimer

The online Cross-Reference Information presented on Springfield Electric's Website is proprietary and provided as a tool to determine potential equivalent catalog numbers. Catalog numbers of other manufacturers are shown for products that appear to be equivalent in their functional use, though not necessarily interchangeable. Product replacements/cross-reference may not be exact one-for-one match. They may not be equivalent as to form-fit-function requirements and may require a system replacement . Springfield Electric and the manufacturers recommend review of manufacturers' product literature, associated documentation of product details and verification of the information necessary to make the appropriate product selecting for a given application.