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1/4 in.-20 Grade 18-8 Stainless Steel Nylon Insert Lock Nut (20-Pack)

$976
  • Installs easily with most wrenches
  • Designed to be used with the same sized screw
  • Stainless steel construction offers rust-resistant performance
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Product Details

Lock nuts (or locknuts) feature a nylon insert that grips onto threads and resists loosening due to vibration. It is best to only use each nut once as its holding power is reduced if reused. They should not be used in extremely high heat or in certain chemical environments as that could weaken the plastic insert.
  • Inner diameter-thread size: 1/4 in.-20
  • Features an internal nylon ring that grips bolt threads better than a standard finished nut
  • Great for use in applications where the bolt may be subject to vibration
  • Can also be used as a secondary nut to help lock the main nut in place
  • Side with the nylon insert should face towards the tip of the bolt, not towards the surface being fastened
  • Thread class: UNC-2B thread type: coarse
  • Specifications met: ASME B18.6.6 and ASME B1.1
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Typical questions asked about products:

  • Is the product durable?
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Customer Reviews

4.4 out of 5
(6)
  • 4.4
    out of 6 reviews
  • 67% recommend this product
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Showing 1-6 of 6 reviews
Worst nylon insert nut ever!
I got a bunch of these for a project I was constructing. Using a 1 inch bolt 1/4 in.-20 stainless steel, the nut will only go on about 1/8 of an inch and trying to force it further, the bolt will break. I thought it was a fluke. So I tried again and another broken bolt. The nylon is too thick and stops the nut from going on. I even tried to heat the nut up with a heat gun before putting it on and only got about 1/2 inch in on a 1 inch bolt before it would not go on any further.
by
    These are the best nuts I have laid my hands...
    These are the best nuts I have laid my hands on, they are better than old nuts
    by
    • Verified Purchase
    by
    • Verified Purchase
    LOCKS
    Locks without needing a lock washer with it.
    by
    • Verified Purchase
    • Recommended
    The Product is Great! it just took 2 months to get shipped.
    The Product is Great! it just took 2 months to get shipped.
    by
    • Verified Purchase
    • Recommended
    5 Star Review
    Rating provided by a verified purchaser
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    Showing 1-6 of 6 reviews

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    Ratings
    (6)
    (48)
    (1)
    (1)
    Fastener Thread TypeCoarseFineCoarseCoarse
    Measurement StandardSAESAESAESAE
    Finish FamilyStainless SteelStainless SteelStainless SteelStainless Steel
    Package Quantity20155050
    Size1/4 in1/4 in#6#8
    Fastener PlatingStainless SteelStainless SteelStainless SteelStainless Steel
    Thread pitch20283232
    MaterialSteelSteelSteelSteel
    Grade18-8 Stainless18-8 Stainless18-8 Stainless18-8 Stainless
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