Nylon Insert Lock Nuts 304 Stainless Steel

Stainless Steel Nylon Insert Hex Lock Nuts

Lock Nut with a Nylon Insert in Corrosion Resistant 304 Stainless Steel


  • Hexagonal shape Nylon Lock Nut
  • Nylon material creates pressure against the fastener
  • Forces the bottom threads of the fastener against the top threads of the bolt
  • Creates a better hold
  • Locks the nut into place so it will not vibrate loose
  • Retain locking ability up to 250 °F (121 °C)
  • Also referred to as Nylon Lock Nuts, Nyloc Nuts, Polymer-Insert Lock Nuts, or Elastic Stop Nuts

To prevent or stop galling (also known as seizing or locking-up) on stainless steel fasteners, we recommend using an anti-seize thread lubricant from our line of
MRO Solutions

Stainless Steel fasteners rubbing against each other (during installation) may cause a reaction known as Galling. The chance of galling increases significantly when a nylon insert is added to the nut. To limit the extra friction created by the nylon insert, Waxed Nylon Insert Lock Nuts are also available.

*Even when using Waxed Nylon Insert Lock Nuts, we still recommend using an MRO Anti-Seize Solution to further deter thread galling during any stainless steel fastener installation.


Nylon Insert
Lock Nut Size
Width Across Flats Height / Thickness
#4 0.251" 0.153"
#6 0.313" 0.188"
#8 0.345" 0.239"
#10 0.376" 0.249"
#12 0.439" 0.328"
1/4" 0.439" 0.328"
5/16" 0.502" 0.359"
3/8" 0.563" 0.468"
7/16" 0.627" 0.468"
1/2" 0.752" 0.609"
9/16"
0.877" 0.656"
5/8" 0.940" 0.765"
3/4" 1.064" 0.890"
7/8" 1.252" 0.999"
1" 1.44" 1.078"
Select Products Below See Product Specifications

NA = "Not Sold In Single Quantity"

Size
Select Package Quantity
SubTotal
Nylon Lock Nut 304 SS - #4-40 (.251 Flats x .153 Height)
SKU #128012
Nylon Lock Nut 304 SS - #4-40 (.251 Flats x .153 Height)
SKU #128012
1
NA
25
$1.50 (0.06/ea)
100
$5.00 (0.05/ea)
1000
$40.00 (0.04/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - #4-48 (.251 Flats x .153 Height)
SKU #128022
Nylon Lock Nut 304 SS - #4-48 (.251 Flats x .153 Height)
SKU #128022
1
NA
25
$2.25 (0.09/ea)
100
$6.00 (0.06/ea)
1000
$30.00 (0.03/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - #6-32 (.313 Flats x .188 Height)
SKU #128032
Nylon Lock Nut 304 SS - #6-32 (.313 Flats x .188 Height)
SKU #128032
1
NA
25
$1.75 (0.07/ea)
100
$5.00 (0.05/ea)
1000
$40.00 (0.04/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - #8-32 (.345 Flats x .239 Height)
SKU #128042
Nylon Lock Nut 304 SS - #8-32 (.345 Flats x .239 Height)
SKU #128042
1
NA
25
$2.25 (0.09/ea)
100
$8.00 (0.08/ea)
1000
$70.00 (0.07/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - #8-36 (.345 Flats x .140 Height)
SKU #1280502
Nylon Lock Nut 304 SS - #8-36 (.345 Flats x .140 Height)
SKU #1280502
1
NA
25
$3.25 (0.13/ea)
100
$9.00 (0.09/ea)
1000
$80.00 (0.08/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - #10-24 (.376 Flats x .249 Height)
SKU #128052
Nylon Lock Nut 304 SS - #10-24 (.376 Flats x .249 Height)
SKU #128052
1
NA
25
$2.50 (0.1/ea)
100
$7.00 (0.07/ea)
1000
$60.00 (0.06/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - #10-32 (.376 Flats x .249 Height)
SKU #128062
Nylon Lock Nut 304 SS - #10-32 (.376 Flats x .249 Height)
SKU #128062
1
NA
25
$2.25 (0.09/ea)
100
$6.00 (0.06/ea)
1000
$50.00 (0.05/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - #12-24 (.439 Flats x .328 Height)
SKU #128072
Nylon Lock Nut 304 SS - #12-24 (.439 Flats x .328 Height)
SKU #128072
1
NA
25
$4.75 (0.19/ea)
100
$15.00 (0.15/ea)
1000
$130.00 (0.13/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - #12-28 (.439 Flats x .328 Height)
SKU #128082
Nylon Lock Nut 304 SS - #12-28 (.439 Flats x .328 Height)
SKU #128082
1
NA
25
$5.50 (0.22/ea)
100
$17.00 (0.17/ea)
1000
$160.00 (0.16/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 1/4-20 (.439 Flats x .328 Height)
SKU #128092
Nylon Lock Nut 304 SS - 1/4-20 (.439 Flats x .328 Height)
SKU #128092
1
NA
25
$3.25 (0.13/ea)
100
$10.00 (0.1/ea)
1000
$80.00 (0.08/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 1/4-28 (.439 Flats x .328 Height)
SKU #128102
Nylon Lock Nut 304 SS - 1/4-28 (.439 Flats x .328 Height)
SKU #128102
1
NA
25
$3.50 (0.14/ea)
100
$11.00 (0.11/ea)
1000
$90.00 (0.09/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 5/16-18 (.502 Flats x .359 Height)
SKU #128112
Nylon Lock Nut 304 SS - 5/16-18 (.502 Flats x .359 Height)
SKU #128112
1
NA
25
$4.75 (0.19/ea)
100
$15.00 (0.15/ea)
1000
$130.00 (0.13/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 5/16-24 (.502 Flats x .359 Height)
SKU #128122
Nylon Lock Nut 304 SS - 5/16-24 (.502 Flats x .359 Height)
SKU #128122
1
NA
25
$5.25 (0.21/ea)
100
$16.00 (0.16/ea)
1000
$130.00 (0.13/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 3/8-16 (.563 Flats x .468 Height)
SKU #128132
Nylon Lock Nut 304 SS - 3/8-16 (.563 Flats x .468 Height)
SKU #128132
1
NA
25
$6.75 (0.27/ea)
100
$25.00 (0.25/ea)
1000
$210.00 (0.21/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 3/8-24 (.563 Flats x .468 Height)
SKU #128142
Nylon Lock Nut 304 SS - 3/8-24 (.563 Flats x .468 Height)
SKU #128142
1
NA
25
$7.25 (0.29/ea)
100
$27.00 (0.27/ea)
1000
$220.00 (0.22/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 7/16-14 (.627 Flats x .468 Height)
SKU #128152
Nylon Lock Nut 304 SS - 7/16-14 (.627 Flats x .468 Height)
SKU #128152
1
$0.50 (0.5/ea)
25
$11.75 (0.47/ea)
100
$43.00 (0.43/ea)
1000
$360.00 (0.36/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 7/16-20 (.627 Flats x .468 Height)
SKU #128162
Nylon Lock Nut 304 SS - 7/16-20 (.627 Flats x .468 Height)
SKU #128162
1
$0.63 (0.63/ea)
25
$14.25 (0.57/ea)
100
$52.00 (0.52/ea)
1000
$430.00 (0.43/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 1/2-13 (.752 Flats x .609 Height)
SKU #128172
Nylon Lock Nut 304 SS - 1/2-13 (.752 Flats x .609 Height)
SKU #128172
1
$0.60 (0.6/ea)
25
$14.25 (0.57/ea)
100
$52.00 (0.52/ea)
1000
$430.00 (0.43/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 1/2-20 (.752 Flats x .609 Height)
SKU #128182
Nylon Lock Nut 304 SS - 1/2-20 (.752 Flats x .609 Height)
SKU #128182
1
$0.83 (0.83/ea)
25
$20.00 (0.8/ea)
100
$73.00 (0.73/ea)
1000
$600.00 (0.6/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 9/16-12 (.877 Flats x .656 Height)
SKU #128191-02
Nylon Lock Nut 304 SS - 9/16-12 (.877 Flats x .656 Height)
SKU #128191-02
1
$2.17 (2.17/ea)
25
$52.75 (2.11/ea)
100
$204.00 (2.04/ea)
1000
$1,640.00 (1.64/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 9/16-18 (.877 Flats x .656 Height)
SKU #128192
Nylon Lock Nut 304 SS - 9/16-18 (.877 Flats x .656 Height)
SKU #128192
1
$2.70 (2.7/ea)
25
$63.00 (2.52/ea)
100
$232.00 (2.32/ea)
1000
$2,130.00 (2.13/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 5/8-11 (.940 Flats x .765 Height)
SKU #128202
Nylon Lock Nut 304 SS - 5/8-11 (.940 Flats x .765 Height)
SKU #128202
1
$1.36 (1.36/ea)
25
$32.00 (1.28/ea)
100
$116.00 (1.16/ea)
1000
$970.00 (0.97/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 5/8-18 (.940 Flats x .765 Height)
SKU #128212
Nylon Lock Nut 304 SS - 5/8-18 (.940 Flats x .765 Height)
SKU #128212
1
$1.70 (1.7/ea)
25
$38.75 (1.55/ea)
100
$141.00 (1.41/ea)
1000
$1,170.00 (1.17/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 3/4-10 (1.064 Flats x .890 Height)
SKU #128222
Nylon Lock Nut 304 SS - 3/4-10 (1.064 Flats x .890 Height)
SKU #128222
1
$4.07 (4.07/ea)
25
$95.00 (3.8/ea)
100
$346.00 (3.46/ea)
1000
$2,900.00 (2.9/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 3/4-16 (1.064 Flats x .890 Height)
SKU #128232
Nylon Lock Nut 304 SS - 3/4-16 (1.064 Flats x .890 Height)
SKU #128232
1
$2.66 (2.66/ea)
25
$62.75 (2.51/ea)
100
$228.00 (2.28/ea)
1000
$1,900.00 (1.9/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 7/8-9 (1.252 Flats x .999 Height)
SKU #128242
Nylon Lock Nut 304 SS - 7/8-9 (1.252 Flats x .999 Height)
SKU #128242
1
$6.35 (6.35/ea)
25
$150.00 (6/ea)
100
$545.00 (5.45/ea)
1000
$4,570.00 (4.57/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 7/8-14 (1.252 Flats x .999 Height)
SKU #128252
Nylon Lock Nut 304 SS - 7/8-14 (1.252 Flats x .999 Height)
SKU #128252
1
$8.47 (8.47/ea)
25
$211.00 (8.44/ea)
100
$837.00 (8.37/ea)
1000
$6,680.00 (6.68/ea)
Subtotal: $0.00 /
Nylon Lock Nut 304 SS - 1-8 (1.44 Flats x 1.078 Height)
SKU #128262
Nylon Lock Nut 304 SS - 1-8 (1.44 Flats x 1.078 Height)
SKU #128262
1
$6.85 (6.85/ea)
25
$161.00 (6.44/ea)
100
$585.00 (5.85/ea)
1000
$4,910.00 (4.91/ea)
Subtotal: $0.00 /

Product Specifications
Color
Silver
Corrosion Resistant
Yes
Drive Style
External Hex
Grade
304
Material
Stainless Steel
Product Type
Nylon Insert Lock Nut
System of Measurement (Unit)
Inch
Thread Direction
Right Hand
Tolerance (IFI)
Actual measurements may vary slightly +/- depending on production run within IFI Tolerances