Brass Hex Nut
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Brass Hex Nut

Brass Hex Nuts are manufactured from an alloy of copper and zinc. Dimensional specifications are governed by ASME B18.2.2 for finish nuts, and ASME B18.6.3 for the smaller diameter machine nuts. There are no grade markings on brass hex nuts. Brass fasteners are commonly used by electrical and communications industries, builders hardware and some marine applications. These nuts provide corrosion resistance in wet environments, offers thermal and electrical conductivity, and are nonmagnetic.

Governing StandardsBrass

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.

Brass Nut Head Marking
Brass requires no material marking

Dimensional SpecificationsBrass

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.
Brass Hex Nut
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Diameter Thread Pitch Width Across Flats Height of Nut Item # Availability Price Quantity UOM
#4 40 1/4 0.0870 NFBR440 In Stock $0.08173/EA EA
#6 32 5/16 0.1020 NFBR632 In Stock $0.08173/EA EA
#8 32 11/32 0.1170 NFBR832 In Stock $0.08243/EA EA
#10 24 3/8 0.1170 NFBR102 In Stock $0.09865/EA EA
#10 32 3/8 0.1170 NFBR103 In Stock $0.08958/EA EA
#12 24 7/16 0.1480 NFBR1220000 In Stock $0.25868/EA EA
1/4 20 7/16 0.2120 NFBR0250000 In Stock $0.19211/EA EA
5/16 18 1/2 0.2580 NFBR0310000 In Stock $0.32519/EA EA
3/8 16 9/16 0.32 NFBR0370000 In Stock $0.36534/EA EA
7/16 14 11/16 0.3650 NFBR0430000 In Stock $0.21653/EA EA
1/2 13 3/4 0.4270 NFBR0500000 In Stock $1.60346/EA EA
9/16 12 7/8 0.4730 NFBR0560000 In Stock $1.33992/EA EA
5/8 11 15/16 0.5350 NFBR0620000 In Stock $1.60411/EA EA
3/4 10 1 1/8 0.6170 NFBR0750000 In Stock $2.73398/EA EA
7/8 9 1 5/16 0.7240 NFBR0870000 In Stock $5.27302/EA EA
1 8 1 1/2 0.8310 NFBR1000000 In Stock $11.4574/EA EA
1 1/4 7 1 7/8 1.0625 NFBR1250000 In Stock $17.43245/EA EA