316 SS Hex Nut
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316 SS Hex Nut

316 stainless steel hex nuts are made from 316 stainless steel, an austenitic alloy which differs from 18-8 by its molybdenum content (2-3%) and a higher nickel content (10-14%). Dimensional specifications are governed by ASME B18.2.2 for finish nuts, and ASME B18.6.3 for the smaller diameter machine nuts. Nuts made of 316 stainless steel are marked "316". 316 stainless steel fasteners are commonly used in applications that require general atmospheric corrosion resistance, such as chemical and food processing equipment. More corrosion resistant than 18-8 stainless steel nuts.

Governing Standards316 Stainless Steel

ASME B18.2.2 Covers the complete general and dimensional data for the various types of inch series square and hex nuts, including machine screw nuts and coupling nuts.
ASME B1.1 UNC & UNF Class 2B Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.

18-8 Stainless Steel Nut Head Marking
316 Stainless Steel requires no material marking

Dimensional Specifications316 Stainless Steel

Hex nut dimensions Hex nut dimensions
Per ASME B18.2.2-2015
Nominal Diameter UNC UNF F G H
Width Across Flats Width Across Corners Thickness
Basic Max Min Max Min Basic Max Min
#0 0.060 80 80 5/32 0.1560 0.1500 0.2210 0.2060 5/32 0.0500 0.0430
#1 0.073 64 72 5/32 0.1560 0.1500 0.2210 0.2060 5/32 0.0500 0.0430
#2 0.086 56 72 3/16 0.1880 0.1800 0.2650 0.2050 3/16 0.0660 0.0570
#3 0.099 48 64 3/16 0.1880 0.1800 0.2650 0.2050 3/16 0.0660 0.0570
#4 0.112 40 48 1/4 0.2500 0.2410 0.2890 0.2750 1/4 0.0980 0.0870
#5 0.125 40 44 5/16 0.3120 0.3020 0.3610 0.3440 5/16 0.1140 0.1020
#6 0.138 32 40 5/16 0.3120 0.3020 0.3610 0.3440 5/16 0.1140 0.1020
#8 0.164 32 36 11/32 0.3440 0.3320 0.3970 1.2540 11/32 0.1300 0.1170
#10 0.190 24 32 3/8 0.3750 0.3620 0.4330 1.4650 3/8 0.1300 0.1170
#12 0.216 24 28 7/16 0.4380 0.4380 0.5050 1.6750 7/16 0.1610 0.1480
1/4 0.2500 20 28 7/16 0.4380 0.4280 0.5050 0.4880 7/32 0.2260 0.2120
5/16 0.3125 18 24 1/2 0.5000 0.4890 0.5770 0.5570 17/64 0.2730 0.2580
3/8 0.3750 16 24 9/16 0.5630 0.5510 0.6500 0.6280 21/64 0.3370 0.3200
7/16 0.4375 14 20 11/16 0.6880 0.6750 0.7940 0.7680 3/8 0.3850 0.3650
1/2 0.5000 13 20 3/4 0.7500 0.7300 0.8660 0.8400 7/16 0.4480 0.4270
9/16 0.5625 12 18 7/8 0.8750 0.8610 1.0100 0.9820 31/64 0.4960 0.4730
5/8 0.6250 11 18 15/16 0.9380 0.9220 1.0830 1.0510 35/64 0.5590 0.5350
3/4 0.7500 10 16 1 1/8 1.1250 1.0880 1.2990 1.2400 41/64 0.6650 0.6170
7/8 0.8750 9 14 1 5/16 1.3120 1.2690 1.5160 1.4470 3/4 0.7760 0.7240
1 1.0000 8 14 1 1/2 1.5000 1.4500 1.7320 1.6530 55/64 0.8870 0.8310
1 1/8 1.1250 7 12 1 11/16 1.6880 1.6310 1.9490 1.8590 31/32 0.9990 0.9390
1 1/4 1.2500 7 12 1 7/8 1.8750 1.8120 2.1650 2.0660 1 1/16 1.0940 1.0300
1 3/8 1.3750 6 12 2 1/16 2.0620 1.9940 2.3820 2.2730 1 11/16 1.2060 1.3800
1 1/2 1.5000 6 12 2 1/4 2.2500 2.1750 2.5980 2.4800 1 9/32 1.3170 1.2450
  1. All dimensions are in inches.
316 SS Hex Nut
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Diameter Thread Pitch Width Across Flats Height of Nut Item # Availability Price Quantity UOM
#6 32 5/16 0.1020 NFS6632 In Stock $0.05738/EA EA
#8 32 11/32 0.1170 NFS6832 In Stock $0.06947/EA EA
#10 24 3/8 0.1170 NFS6102 In Stock $0.15382/EA EA
#10 32 3/8 0.1170 NFS6103 In Stock $0.17201/EA EA
#12 24 7/16 0.1480 NFS61220000 In Stock $0.519/EA EA
1/4 20 7/16 0.2120 NFS60250000 In Stock $0.08292/EA EA
5/16 18 1/2 0.2580 NFS60310000 In Stock $0.12827/EA EA
3/8 16 9/16 0.32 NFS60370000 In Stock $0.15566/EA EA
7/16 14 11/16 0.3650 NFS60430000 In Stock $0.33414/EA EA
1/2 13 3/4 0.4270 NFS60500000 In Stock $0.34418/EA EA
9/16 12 7/8 0.4730 NFS60560000 In Stock $1.25494/EA EA
5/8 11 15/16 0.5350 NFS60620000 In Stock $1.12923/EA EA
3/4 10 1 1/8 0.6170 NFS60750000 In Stock $1.00689/EA EA
7/8 9 1 5/16 0.7240 NFS60870000 In Stock $1.59394/EA EA
1 8 1 1/2 0.8310 NFS61000000 In Stock $2.42875/EA EA
1 1/8 7 11/16 0.9390 NFS61120000 In Stock $5.62645/EA EA
1 1/4 7 1 7/8 1.03 NFS61250000 In Stock $6.94959/EA EA
1 1/2 6 2 1/4 1.2450 NFS61500000 In Stock $8.54199/EA EA