316 SS Nylon Insert Lock Nut
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316 SS Nylon Insert Lock Nut

316 stainless steel nylon insert lock nuts are hex nuts that have a nylon collar insert in one end of the nut. The nylon insert increases friction on the screw thread, which resists loosening. Dimensional specifications are governed by ASME B18.16.6. The nylon insert lock nut is an economic locking nut and ideal in applications where vibration or motion could loosen or undo the nut.

Governing Standards316 Stainless Steel

ASME B18.16.6 Covers the complete general, dimensional, mechanical, and performance requirements (proof load, prevailing torque, and torque-tension) for carbon steel, inch series nylon insert locknuts of grades N2, N5, and N8 in styles NE (1/4 in. – 1-1/2 in.), NTE (1/4 in. – 1-1/2 in.), NU (1/4 in. – 3 in.), NTU (1/4 in. – 3 in.), NM (#2-#12), NTM (#2-#12), and hex flange (1/4 in. – 3/4 in.). This Standard also includes all-metal hex (#4-1-1/2 in.) and hex flange (1/4 in. – 3/4 in.) locking nuts of grades A, B, C, F, and G. These nut designs are designated as American National Standards.
ASME B1.1 UNC & UNF Class 2B Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.

316 Stainless Steel Lock Nut Material Marking
316 Stainless Steel requires no material marking

Dimensional Specifications316 Stainless Steel

Nylon insert locknut dimensions
Per ASME B18.16.6-2017
Nominal Diameter UNC UNF A B C D
Width Across Flats Width Across
Corners
Thickness Hex Height
Basic Max Min Min Max Min Min
#2 0.086 56   1/4 0.251 0.243 0.268 0.153 0.133 0.081
#3 0.099 48   1/4 0.251 0.243 0.268 0.153 0.133 0.081
#4 0.112 40   1/4 0.251 0.243 0.268 0.153 0.133 0.081
#5 0.125 40   1/4 0.251 0.243 0.268 0.153 0.133 0.081
#6 0.138 32 40 5/16 0.313 0.305 0.339 0.188 0.168 0.103
#8 0.164 32 36 11/32 0.345 0.336 0.374 0.239 0.219 0.140
#10 0.190 24 32 3/8 0.376 0.243 0.410 0.249 0.229 0.140
#12 0.216 24 28 1/4 0.439 0.430 0.482 0.328 0.298 0.225
1/4 0.250 20 28 7/16 0.439 0.430 0.482 0.328 0.298 0.225
5/16 0.313 18 24 1/2 0.502 0.492 0.552 0.359 0.329 0.250
3/8 0.375 16 24 9/16 0.564 0.553 0.622 0.468 0.438 0.335
7/16 0.438 14 20 5/8 0.627 0.616 0.698 0.468 0.438 0.324
1/2 0.500 13 20 3/4 0.752 0.741 0.837 0.609 0.579 0.464
9/16 0.563 12 18 7/8 0.877 0.865 0.978 0.656 0.626 0.469
5/8 0.625 11 18 15/16 0.940 0.928 1.051 0.765 0.735 0.593
3/4 0.750 10 16 1 1/8 1.064 1.052 1.191 0.890 0.861 0.742
7/8 0.875 9 14 1 5/16 1.252 1.239 1.403 0.999 0.969 0.790
1 1.000 8 14 1 1/2 1.440 1.427 1.615 1.078 1.016 0.825
1 1/8 1.125 7 12 1 11/16 1.627 1.614 1.826 1.203 1.410 0.930
1 1/4 1.250 7 12 1 7/8 1.815 1.801 2.038 1.422 1.360 1.125
1 1/2 1.500 6 12 2 1/4 2.197 2.159 2.444 1.640 1.578 1.313
  1. All dimensions are in inches.
316 SS Nylon Insert Lock Nut
View
Diameter Thread Pitch Width Across Flats Height of Nut Item # Availability Price Quantity UOM
#4 40 1/4 0.1330 NNIS 400S6 3-5 Working Days $0.18909/EA EA
#6 32 5/16 0.1680 NNIS 600S6 3-5 Working Days $0.15121/EA EA
#10 24 3/8 0.2290 NNIS102000S6 3-5 Working Days $0.4566/EA EA
1/4 20 7/16 0.2980 NNIS025S6 In Stock $0.24573/EA EA
5/16 18 1/2 0.3290 NNIS031S6 In Stock $0.19167/EA EA
3/8 16 9/16 0.4380 NNIS037S6 In Stock $0.29327/EA EA
7/16 14 5/8 0.4380 NNIS043S6 3-5 Working Days $1.20173/EA EA
1/2 13 3/4 0.5790 NNIS050S6 In Stock $0.45215/EA EA
5/8 11 15/16 0.7350 NNIS062S6 In Stock $1.16518/EA EA
3/4 10 1 1/8 0.8610 NNIS075S6 In Stock $1.76892/EA EA
7/8 9 1 5/16 0.9690 NNIS087S6 In Stock $6.97321/EA EA
1 8 1 1/2 1.0160 NNIS100S6 In Stock $8.70542/EA EA