nVent AS350 - Hol-Sealers Hole Seal, 4.62-inch Diameter, Gray, Mild Steel
nVent

AS350

UPC: 783510597900

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Overview

The nVent HOFFMAN Hol-Sealers Hole Seal (SKU: AS350) is a gray mild steel sealing solution designed to protect electrical enclosures, control panels, and industrial equipment from environmental contaminants. Engineered by nVent, this versatile hole seal blocks dust, dirt, oil, and water ingress through pushbutton holes, conduit openings, and knockout openings in enclosures. With a 4.62-inch diameter, the AS350 accommodates hole sizes from 0.19 inches up to the maximum diameter specified in nVent compatibility tables, making it ideal for retrofitting or new installations. Designed for enclosures with wall thicknesses up to 0.31 inches (8 mm), the AS350 maintains ingress protection (IP) ratings of Type 3R, 4, 4X, 12, and 13, ensuring compliance with industrial standards for moisture resistance, dust protection, and corrosion resistance. The gray mild steel construction provides durability in harsh environments such as manufacturing plants, chemical processing facilities, outdoor telecommunications shelters, and utility substations. Installation is tool-free and straightforward, conforming to irregular hole shapes without custom gaskets or additional sealing compounds. This reduces labor time and material waste, making it a cost-effective solution for maintenance teams and electrical contractors.
  • Available in multiple colors and sizes
  • Oil-resistant gasket provided
  • Steel model has plated stud (10-32x5/8) and wing nut
  • Stainless steel model has 300 series stainless steel stud (10-24x5/8) and wing nut
  • 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

Specifications

Accessory Type
Hole Seals
Application
Power Distribution; Controls and Drives
Application
Controls and Drives;Power Distribution
Color
Gray
Color Code
ANSI 61
Finish
Powder Coated
Hol-Sealer Diameter
4.62 in
Hol-Sealer Diameter
89 mm
Material
Mild Steel
Material
Mild Steel;Steel
Max Hole Diameter
4.12 in
Min Hole Diameter
105 mm
Modification Services
Yes
Product Family
Hol-Sealers
Size
4.62 Dia. in
Thickness
1.5 mm
Thickness
16 ga
Thickness
51.40mm (2.024")
Type
External Mounting for Industrial Enclosures
Type Number
Type 3R
Usage
3 1/2-in. conduit holes
Weight
0.7 lb
Works With
NEMA / IEC
Package Dimensions (L x W x H)
8 IN x 6.5 IN x 1 IN
Package Dimensions (L x W x H)
20.32 cm x 16.51 cm x 2.54 cm
Package Weight (Imperial)
0.750 L
Package Weight (Metric)
0.340 kg
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Frequently Asked Questions about nVent

What industries and applications are nVent products used for?

nVent products are engineered for critical infrastructure and industrial applications across multiple demanding sectors. Key markets include Construction, Data Centers, Defense, Healthcare, Mining, Oil & Gas Refineries, Power Plants, Rail/Transit, Renewable Energy, Security, Ship Building, Steel Mills, Telecom, and Utilities. Their solutions are designed to withstand extreme environmental conditions, with temperature ranges from -55°C to 105°C and specialized features like UV resistance, oil resistance, and flame resistance.

What environmental ratings do nVent products have?

nVent enclosures feature comprehensive environmental ratings, including UL 508A, CSA, and NEMA Type 1, 2, 3, 4, 4X, 12, and 13 certifications. They are rated IEC 60529 IP66, providing robust protection against dust, water, and corrosion in both indoor and outdoor environments. These products operate effectively in temperatures ranging from -40°F to 266°F, with enhanced UV inhibitors for outdoor weathering and oil-resistant gaskets for superior sealing.

What accessories are available for nVent products?

nVent offers a comprehensive range of accessories across multiple product lines, including EMC accessories like bonding cable clamps and strain reliefs, inline accessories such as lock inserts and mounting brackets, CONCEPT accessories including panel conversion kits and rack-mount angles, and seismic accessories for specialized mounting requirements. Key accessory categories include grounding kits, DIN rail mounting solutions, panel supports, handles, and various mounting hardware compatible with different enclosure types.

What certifications and standards do nVent products comply with?

nVent products meet critical international certifications including UL (United States), CSA (Canada), CE (European Community), and EAC (Russia). Our products are designed to comply with rigorous industrial standards such as NEMA enclosure ratings, IEC 60529 IP ratings, and international safety standards across multiple industrial markets including oil & gas, power, manufacturing, and infrastructure.

What is nVent's warranty policy?

nVent offers a standard 18-month warranty from invoicing date for most automation products, covering defects in workmanship and materials. The warranty requires proper transportation, handling, storage, and installation within specified environmental conditions. Warranty coverage includes repair or replacement at nVent's discretion, with certain conditions such as authorized service repairs and operation within designed capacity limits.

What technical support does nVent offer?

nVent offers comprehensive technical support through multiple global contact centers across North America, South America, Europe, Middle East, India, and Asia. Customers can reach technical experts by phone at regional numbers, with the North American headquarters in Minneapolis, MN providing primary support at +1.763.421.2240. Additionally, nVent provides online support resources through their website, including CAD drawing downloads and an 'Ask The Expert' feature to assist with product technical inquiries.