Keep-Nut 4 Crown, 1/4-20 Thread, 8.5mm Height (IM4S/P1-4.20/H8.5)

SKU: SPE-IM4S/P1.4-20/H8

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18713 in stock

Quantity Discount (%) Price
1 $2.14
500 5.14 % $2.03
2,000+ 13.08 % $1.86
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Keep-Nut press-in self-anchoring inserts by Specialinsert is a revolutionary press-in self-anchoring insert commonly used for a number of applications including undermount sink installation, ventilated facades, cladding and furniture. These self-anchoring fasteners are designed to install into a wide range of surfaces including Granite, Marble, Quartz, Solid Surface, HPL, Glass, Fiber Cement and other compact materials.

The insert’s small size also lends itself to be installed into extremely thin surfaces while also being extremely strong. The Keep-nut is made with nylon and stainless steel for exterior performance.

Testing Data:

Material Keep-Nut Type Average Pull-Out Load on a Single Insert (lbs)
Granite 20mm IM4S/P1-4.20/H8.5 1080
Marble 20mm IM4S/P1-4.20/H8.5 849
Travertine 20mm IM4S/P1-4.20/H8.5 496
Fiber Cement (high density) 12mm IM4S/P1-4.20/H8.5 606
Fiber Cement (high density) 10mm IM4S/P1-4.20/H8.5 527
Fiber Cement (high density) 8mm IM2S/P1-4.20/H6 277
HPL 12mm IM4S/P1-4.20/H8.5 1194
HPL 10mm IM4S/P1-4.20/H8.5 1348
HPL 8mm IM2S/P1-4.20/H6 596
Corian 12mm IM4S/P1-4.20/H8.5 1068
Corian 10mm IM2S/P1-4.20/H6 650
Engineered Stone 15mm IM4S/P1-4.20/H8.5 672

Additional information

Weight 0.006 lbs
Dimensions 0.5 × 0.5 × 0.33 in

Thread Size



Keep Nut Allen Post

Must Ship Freight

Country Of Manufacture





4 Crown, 1/4-20 Thread, 8.5mm Height


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