Hillman Expansion Nut Neoprene Rubber Leakproof Blind Fastening 1/4"-20 x 5/8" Black – 15 Pack

★★★★★ 4.1 105 reviews

US$5.28
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Product details

Management number 250212621 Release Date 2026/09/17 List Price US$5.28 Model Number 250212621
Category

Product Description An expansion or well nut consists of a flanged neoprene bushing with a threaded nut embedded in the non flanged end. It is used in blind bolt holes to fasten a piece and seal the bolt hole. The nut is inserted into the hole flange side up, as the bolt is screwed into the nut the rubber on the other side of the hole expands and seals the bolt hole. From the Manufacturer An expansion or well nut consists of a flanged neoprene bushing with a threaded nut embedded in the non flanged end. It is used in blind bolt holes to fasten a piece and seal the bolt hole. The nut is inserted into the hole flange side up, as the bolt is screwed into the nut the rubber on the other side of the hole expands and seals the bolt hole.

  • LEAKPROOF BLIND FASTENING: Expansion nuts seal bolt holes to prevent leaking; the rubber body expands behind the surface to create a watertight seal.
  • SAFE FOR BLIND AND CLOSED-END HOLES: Designed for use in blind holes and closed-end surfaces where backside access is not possible during installation.
  • RUBBER AND STEEL CONSTRUCTION: Neoprene rubber combined with a steel threaded insert absorbs vibration and seals the bolt hole reliably.
  • PANEL AND MARINE APPLICATIONS: Ideal for panel mounting, equipment installation, automotive components, and marine use requiring sealed fastening.
  • TRUSTED HILLMAN FASTENING SOLUTIONS: Hillman hardware products are engineered for consistent quality, dependable performance, and reliable fastening across construction, repair, and home improvement applications.
UPC 008236028317
ASIN B00I2VTERO
Brand Hillman
Color Black
Model 3326
Set Name 15 Expansion Nuts
Size Name 5/8 Inch
Metal Type Brass
Unit Count 15 Count
Drive Style One Way
Item Weight 1.76 ounces
Part Number 3326
Thread Size 1/4
Thread Type Unified National Coarse
Finish Types Unfinished
Grade Rating industrial
Manufacturer The Hillman Group
Thread Class Class 2
Thread Style Right Hand
Fastener Type Flange
Item Diameter 0.63 inches
Material Type Brass
Exterior Finish Plain
Item Dimensions 1.43 x 2.46 x 1.65 inches
Number Of Items 15
Thread Coverage Partially Threaded
Number of Pieces 15
Outside Diameter 0.63 inches
Screw Head Style Hex
Inside Thread Size #4
Compatible Groove Diameter 0.63 inches
Global Trade Identification Number 00008236028317

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