Enclosure Hole Seals

Enclosure hole seals are designed to close and protect unused openings in electrical enclosures, helping maintain environmental integrity and system reliability. RSP Supply carries a full line of enclosure hole seals engineered to block moisture, dust, oil, and other contaminants from entering cabinet interiors. These seals are commonly used to close extra pushbutton holes, conduit knockouts, and unused access points.

Installing enclosure hole seals is a simple yet critical step in preserving enclosure protection ratings. Properly installed seals help maintain watertight and airtight conditions, which is especially important for outdoor installations or environments exposed to liquids, washdowns, or airborne debris. By preventing contaminant ingress, hole seals help reduce corrosion and extend the life of internal electrical components.

Enclosure hole seals are available in a variety of sizes and materials to match enclosure construction and environmental requirements. When selected and installed correctly, these accessories support compliance with NEMA-rated enclosures and help ensure long-term equipment protection in industrial and commercial applications.

Found 81 items
Normally In Stock
nVent Hoffman AS100SS Stainless Steel Hole Seal 1"-1.38"
Free U.S Ground shipping
$81.44
$62.65
Normally In Stock
nVent Hoffman AS075SS Stainless Steel Hole Seal 3/4"-1.06"
Free U.S Ground shipping
$62.87
$48.36
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nVent Hoffman AS050LG Light Gray Steel Hole Seal 1/2-.88"
Free U.S Ground shipping
$22.65
$17.42
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nVent Hoffman ASPB Gray Steel Hole Seal 30.5mm-1.25"
Free U.S Ground shipping
$29.16
$22.43
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nVent Hoffman AS200 Gray Steel Hole Seal 2"-2-1/2"
Free U.S Ground shipping
$48.35
$37.19
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nVent Hoffman AS200SS Stainless Steel Hole Seal 2"-2-1/2"
Free U.S Ground shipping
$111.90
$86.08
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nVent Hoffman AS250SS Stainless Steel Hole Seal 2-1/2"-3"
Free U.S Ground shipping
$204.88
$157.60
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nVent Hoffman AS300SS Stainless Steel Hole Seal 3"-3.62"
Free U.S Ground shipping
$205.18
$157.83
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nVent Hoffman ASPB100125NM Non-Metallic Gray Hole Seal 1.36"
Free U.S Ground shipping
$64.95
$49.96
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nVent Hoffman AS300 Gray Steel Hole Seal 3"-3.62"
Free U.S Ground shipping
$76.60
$58.92
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nVent Hoffman AS350 Gray Steel Hole Seal 3-1/2"-4.12"
Free U.S Ground shipping
$96.49
$74.22
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nVent Hoffman AS400 Gray Steel Hole Seal 4"-4.62"
Free U.S Ground shipping
$120.28
$92.52
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nVent Hoffman AS100LG Light Gray Steel Hole Seal 1"-1.38"
Free U.S Ground shipping
$30.25
$23.27
Normally In Stock
nVent Hoffman AS075 Gray Steel Hole Seal 3/4"-1.06"
Free U.S Ground shipping
$27.31
$21.01
Normally In Stock
nVent Hoffman AS075LG Light Gray Steel Hole Seal 3/4"-1.06"
Free U.S Ground shipping
$28.38
$21.83
Normally In Stock
nVent Hoffman AS050 Gray Steel Hole Seal 1/2-.88"
Free U.S Ground shipping
$22.65
$17.42
Normally In Stock
nVent Hoffman AS056CB Beige Steel Hole Seal Micro .56"
Free U.S Ground shipping
$20.59
$15.84
Normally In Stock
nVent Hoffman EXAS100SS6 Hazardous Locations Hole Seal
Free U.S Ground shipping
$99.15
$76.27
Normally In Stock
nVent Hoffman AS050SS Stainless Steel Hole Seal 1/2"-.88"
Free U.S Ground shipping
$50.63
$38.95
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Stahlin REAVP1/2 Plug
Free U.S Ground shipping
$47.41
$39.51
Normally In Stock
Stahlin REHPSERIES2 Plug
Free U.S Ground shipping
$10.04
$8.37
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Stahlin REHPSERIES3 Plug
Free U.S Ground shipping
$17.52
$14.60
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Stahlin REHPSERIES4 Plug
Free U.S Ground shipping
$22.26
$18.55
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Allied Moulded AMHSPL-GY .625" Hole Seal Gray
Free U.S Ground shipping
$7.74
$6.45
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Allied Moulded AMHS150 2" Hole Seal Light Gray
Free U.S Ground shipping
$17.40
$14.50
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Allied Moulded AMHS075 1" Hole Seal Light Gray
Free U.S Ground shipping
$9.41
$7.84
Normally In Stock
Allied Moulded AMHS100 1.375" Hole Seal Light Gray
Free U.S Ground shipping
$12.25
$10.21
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nVent Hoffman EXAS050SS6 Hazardous Locations Hole Seal
Free U.S Ground shipping
$61.67
$47.44
Normally In Stock
nVent Hoffman EXAS075SS6 Hazardous Locations Hole Seal
Free U.S Ground shipping
$75.36
$57.97
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nVent Hoffman AS056MLG Gray Steel Hole Seal Micro .56"
Free U.S Ground shipping
$20.59
$15.84
Normally In Stock
nVent Hoffman ASPBG Gray Steel Hole Seal 22.5mm-.88"
Free U.S Ground shipping
$22.65
$17.42
Normally In Stock
nVent Hoffman AS056M Gray Steel Hole Seal Micro .56"
Free U.S Ground shipping
$25.78
$19.83
Normally In Stock
nVent Hoffman AS125 Gray Steel Hole Seal 1-1/4"-1.69"
Free U.S Ground shipping
$39.48
$30.37
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nVent Hoffman AS125LG Light Gray Steel Hole Seal 1-1/4"-1.69"
Free U.S Ground shipping
$35.20
$27.08
Normally In Stock
nVent Hoffman AS150 Gray Steel Hole Seal 1-1/2"-2"
Free U.S Ground shipping
$44.88
$34.52
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nVent Hoffman AS200LG Light Gray Steel Hole Seal 2"-2-1/2"
Free U.S Ground shipping
$45.24
$34.80
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nVent Hoffman AS056MSS Stainless Steel Hole Seal Micro .56"
Free U.S Ground shipping
$55.31
$42.55
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nVent Hoffman ASPBGSS Stainless Steel Hole Seal 22.5mm-.80"
Free U.S Ground shipping
$50.63
$38.95
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nVent Hoffman ASPBSS Stainless Steel Hole Seal 30.5mm-1.25"
Free U.S Ground shipping
$68.39
$52.61
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nVent Hoffman AS125SS Stainless Steel Hole Seal 1-1/4"-1.69"
Free U.S Ground shipping
$74.56
$57.35
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nVent Hoffman AS150SS Stainless Steel Hole Seal 1-1/2"-2"
Free U.S Ground shipping
$102.27
$78.67
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nVent Hoffman AS150200250NM Non-Metallic Gray Hole Seal 1.95"
Free U.S Ground shipping
$100.32
$77.17
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Allied Moulded AMHSPL-S .5" Hole Seal Light Gray
Free U.S Ground shipping
$7.74
$6.45
Normally In Stock
Allied Moulded AMHSPL .625" Hole Seal Light Gray
Free U.S Ground shipping
$7.74
$6.45
Normally In Stock
Allied Moulded AMHS050 .812" Hole Seal Light Gray
Free U.S Ground shipping
$8.30
$6.92
Normally In Stock
nVent Hoffman AS350SS Stainless Steel Hole Seal 3-1/2"-4.12"
Free U.S Ground shipping
$271.41
$208.78
Normally In Stock
nVent Hoffman AS400SS Stainless Steel Hole Seal 4"-4.62"
Free U.S Ground shipping
$300.87
$231.44
Normally In Stock
nVent Hoffman ASPB05075NM Non-Metallic Gray Hole Seal .86"
Free U.S Ground shipping
$40.38
$31.06

FAQs

Q: What are enclosure hole seals used for?
Enclosure hole seals are used to seal unused holes in enclosure walls, such as extra pushbutton holes or conduit knockouts, to prevent moisture, dust, and contaminants from entering.

Q: Why is it important to seal unused enclosure openings?
Sealing unused openings helps maintain enclosure protection ratings, prevents corrosion, and protects internal components from environmental damage.

Q: What materials are commonly used for enclosure hole seals?
Common materials include stainless steel, aluminum, and durable rubber or plastic compounds designed to resist moisture, corrosion, and UV exposure.

Q: Are enclosure hole seals suitable for outdoor use?
Yes. Many enclosure hole seals are designed for outdoor use and provide weatherproof protection when installed correctly.

Q: Do enclosure hole seals help maintain NEMA ratings?
When properly rated and installed, enclosure hole seals help preserve the enclosure’s NEMA rating by preventing water and dust ingress.

Why Buy Enclosure Hole Seals from RSP Supply

RSP Supply offers a dependable selection of enclosure hole seals designed for weatherproof protection and long-term reliability. Our products support proper enclosure modifications while helping maintain environmental ratings. Customers rely on RSP Supply for quality enclosure accessories, technical expertise, and solutions that protect critical electrical equipment.