Grade 2 Left Hand Thread Hex Nut, Plated
Choose Favorites List

Grade 2 Left Hand Thread Hex Nut, Plated

Left Hand Threaded SAE J995 Grade 2 hex nuts are an economical, common low strength nut manufactured from low carbon steel. Grade 2 hex nuts are available in diameters from 1/4" through 1 1/2" inclusive. Dimensional specifications are governed by ASME B18.2.2. Left hand threads are used in specialty applications to mate with left handed bolts and studs. These nuts are equivalent in strength to ASTM A563 Grade A nuts. Available in zinc plated finish. Zinc plating sacrifices itself, corroding before the base material, offering added corrosion resistance.

Governing StandardsGrade 2

SAE J995 Covers the mechanical and material requirements for inch series fasteners used in automotive and related industries in diameters through 1-1/2″.
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.

Grade 2 Marking
Grade 2 requires no material marking

Mechanical PropertiesGrade 2

Low Carbon Steel Per SAE J995 2017-07
Diameter Proof Load Stress (1) Core Hardness
psi Rockwell
1/4 thru 1 1/2" UNC & 8UN 90,000 C32 Max
1/4 thru 1 1/2" UNF, 12UN and Finer 80,000 C32 Max
  1. 1. The proof load in pounds for nuts is computed by multiplying the proof load stress, in psi (lbf/in2), for the nut grade, size, thread series, and type, as shown in Table 2, and tensile stress area in square inches (in2), for the applicable size and thread series shown in Table 3. (For tabulated values see Appendix A.) To convert the inch based pounds per square inch (psi) values above to metric Megapascal (MPa) units, multiply the above values by .00689.

Chemical PropertiesGrade 2

Per SAE J995 2017-07
Grade Material Carbon Phosphorus Sulfur
% by weight % by weight % by weight
2 Low Carbon Steel 0.55 max 0.12 (1) 0.15 max (2)
  1. 1. Resulfurized and rephosphorized material is not subject to rejection based on check analysis for sulfur.
  2. 2. If agreed between purchaser and producer, sulfur content may be 0.23 maximum.

Dimensional SpecificationsGrade 2

Finished 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
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.
Grade 2 Left Hand Thread Hex Nut, Plated
View
Diameter Thread Pitch Thread Type Width Across Flats Height of Nut Item # Availability Price Quantity UOM
1/4 20 Coarse LH 7/16 0.2188 NF2P025LHNC In Stock $0.22846/EA EA
1/4 28 Fine LH 7/16 0.2188 NF2P025LHNF In Stock $0.24952/EA EA
5/16 18 Coarse LH 1/2 0.2656 NF2P031LHNC In Stock $0.32938/EA EA
5/16 24 Fine LH 1/2 0.2656 NF2P031LHNF In Stock $0.40985/EA EA
3/8 16 Coarse LH 9/16 0.3281 NF2P037LHNC In Stock $0.5426/EA EA
3/8 24 Fine LH 9/16 0.3281 NF2P037LHNF In Stock $0.64041/EA EA
7/16 14 Coarse LH 11/16 0.3750 NF2P043LHNC In Stock $0.6302/EA EA
7/16 20 Fine LH 11/16 0.3750 NF2P043LHNF In Stock $0.7268/EA EA
1/2 13 Coarse LH 3/4 0.4375 NF2P050LHNC In Stock $0.88326/EA EA
1/2 20 Fine LH 3/4 0.4375 NF2P050LHNF In Stock $0.71686/EA EA
5/8 11 Coarse LH 15/16 0.5469 NF2P062LHNC In Stock $1.57881/EA EA
5/8 18 Fine LH 15/16 0.5469 NF2P062LHNF In Stock $1.84358/EA EA
3/4 10 Coarse LH 1 1/8 0.6406 NF2P075LHNC In Stock $1.58412/EA EA
3/4 16 Fine LH 1 1/8 0.6406 NF2P075LHNF In Stock $2.33369/EA EA
7/8 9 Coarse LH 1 5/16 0.75 NF2P087LHNC In Stock $3.99352/EA EA
7/8 14 Fine LH 1 5/16 0.75 NF2P087LHNF In Stock $3.08183/EA EA
1 8 Coarse LH 1 1/2 0.8594 NF2P100LHNC 3-5 Working Days $5.87622/EA EA
1 14 Fine LH 1 1/2 0.8594 NF2P100LHNF In Stock $6.8822/EA EA
1 1/8 7 Coarse LH 11/16 0.9688 NF2P112LHNC In Stock $13.93048/EA EA
1 1/8 12 Fine LH 11/16 0.9688 NF2P112LHNF In Stock $18.08276/EA EA
1 1/4 7 Coarse LH 1 7/8 1.0625 NF2P125LHNC In Stock $11.62634/EA EA
1 1/4 12 Fine LH 1 7/8 1.0625 NF2P125LHNF In Stock $30.1038/EA EA