Alloy Steel Socket Head Screws

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Alloy Steel Socket Head Screws

Our Alloy Steel Socket Head Screws are manufactured to the highest industry standards, ensuring exceptional strength and performance. Whether you require the high tensile strength of alloy steel or the superior corrosion resistance of stainless steel, these fasteners are optimized for precision assembly. Ideal for use in machinery, automotive components, and structural applications, they provide a dependable solution for your most critical fastening needs. Explore our selection to find the exact specifications required for your project.

System of Measurement
Inch Metric
Specifications Met
ASME B18.3, ASTM A574 ASME B18.3, ASTM A574, ASTM B117 ASME B18.3.1M, ASTM A574M ASTM A574 ASTM A574M, DIN 912, ISO 4762 ASTM B117, DIN 912, ISO 4762 DIN 912 DIN 912, ISO 21269 DIN 912, ISO 4762 DIN 912, ISO 4762, ISO 898-1
Thread Size
0-80 1-64 1-72 2-56 2-64 3-48 3-56 4-40 4-48 5-40 5-44 6-32 6-40 8-32 8-36 10-24 10-32 12-24 1/4"-20 1/4"-28 1/4"-32 5/16"-18 5/16"-24 5/16"-32 3/8"-16 3/8"-24 7/16"-14 7/16"-20 1/2"-13 1/2"-20 9/16"-12 9/16"-18 5/8"-11 5/8"-18 3/4"-10 3/4"-16 7/8"-14 7/8"-9 1"-12 1"-14 1"-8 1 1/8"-12 1 1/8"-7 1 1/4"-12 1 1/4"-7 1 3/8"-6 1 1/2"-12 1 1/2"-6 1 3/4"-5 2"-4 1/2 2"-8 2 1/4"-4 1/2 2 1/4"-8 2 1/2"-4 2 1/2"-8 M1.4 M1.6 M2 M2.5 M2.6 M3 M3.5 M4 M5 M6 M7 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 M42 M48
Length
1/16" 3/32" 1/8" 5/32" 3/16" 1/4" 5/16" 3/8" 7/16" 1/2" 9/16" 5/8" 11/16" 3/4" 7/8" 1" 1 1/8" 1 1/4" 1 3/8" 1 1/2" 1 5/8" 1 3/4" 1 7/8" 2" 2 1/4" 2 3/8" 2 1/2" 2 5/8" 2 3/4" 3" 3 1/4" 3 1/2" 3 3/4" 4" 4 1/4" 4 3/8" 4 1/2" 4 3/4" 5" 5 1/4" 5 1/2" 5 3/4" 6" 6 1/4" 6 1/2" 6 3/4" 7" 7 1/4" 7 1/2" 8" 8 1/2" 9" 9 1/2" 10" 10 1/2" 11" 12" 13" 14" 15" 16" 18" 20" 2 mm 3 mm 4 mm 5 mm 6 mm 8 mm 10 mm 12 mm 14 mm 15 mm 16 mm 18 mm 20 mm 22 mm 25 mm 30 mm 35 mm 40 mm 45 mm 50 mm 55 mm 60 mm 65 mm 70 mm 75 mm 80 mm 85 mm 90 mm 95 mm 100 mm 110 mm 120 mm 130 mm 140 mm 150 mm 160 mm 170 mm 180 mm 190 mm 200 mm 210 mm 220 mm 240 mm 260 mm 300 mm 320 mm 340 mm 360 mm 400 mm
Material
Black-Oxide Alloy Steel Blue-Dyed Zinc-Plated Alloy Steel Zinc-Flake-Coated Alloy Steel Zinc-Plated Alloy Steel
Threading
Fully Threaded Partially Threaded
Head Diameter
0.096" 0.118" 9/64" 0.161" 0.183" 0.205" 0.226" 0.27" 5/16" 0.324" 3/8" 15/32" 9/16" 21/32" 3/4" 27/32" 15/16" 1 1/8" 1 5/16" 1 1/2" 1 11/16" 1 7/8" 2 1/16" 2 1/4" 2 5/8" 3" 3 3/8" 3 3/4" 2.5 mm 3 mm 3.8 mm 4.5 mm 5 mm 5.5 mm 6 mm 6.2 mm 7 mm 8.5 mm 10 mm 12 mm 13 mm 16 mm 18 mm 21 mm 24 mm 27 mm 30 mm 33 mm 36 mm 40 mm 45 mm 50 mm 54 mm 63 mm 72 mm
Head Height
0.06" 0.073" 0.086" 0.099" 0.112" 1/8" 0.138" 0.164" 0.19" 0.216" 1/4" 5/16" 3/8" 7/16" 1/2" 9/16" 5/8" 3/4" 7/8" 1" 1 1/8" 1 1/4" 1 3/8" 1 1/2" 1 3/4" 2" 2 1/4" 2 1/2" 1.4 mm 1.6 mm 2 mm 2.5 mm 2.6 mm 3 mm 3.5 mm 4 mm 5 mm 6 mm 7 mm 8 mm 10 mm 12 mm 14 mm 16 mm 18 mm 20 mm 22 mm 24 mm 27 mm 30 mm 33 mm 36 mm 42 mm 48 mm
Thread Pitch
0.3 mm 0.35 mm 0.4 mm 0.45 mm 0.5 mm 0.6 mm 0.7 mm 0.75 mm 0.8 mm 1 mm 1.25 mm 1.5 mm 1.75 mm 2 mm 2.5 mm 3 mm 3.5 mm 4 mm 4.5 mm 5 mm
Thread Diameter
0.06" 0.073" 0.086" 0.099" 0.112" 0.125" 0.138" 0.164" 0.19" 0.216" 0.25" 0.3125" 0.375" 0.4375" 0.5" 0.5625" 0.625" 0.75" 0.875" 1" 1.125" 1.25" 1.375" 1.5" 1.75" 2" 2.25" 2.5"
Thread Type
Metric UN UNC UNEF UNF UNRC UNRF
Drive Size
0.050" 1 1/2" 1 1/4" 1 3/4" 1" 1.3 mm 1.5 mm 1/16" 1/2" 1/4" 10 mm 12 mm 14 mm 17 mm 19 mm 2 mm 2.5 mm 22 mm 24 mm 27 mm 3 mm 3/16" 3/32" 3/4" 3/8" 32 mm 36 mm 4 mm 5 mm 5/16" 5/32" 5/64" 5/8" 6 mm 7/16" 7/64" 7/8" 8 mm 9/64"
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Part Number Thread Size Length Threading Specifications Met Thread Type Head Diameter Head Height Material Tensile Strength Hardness
0009FA00955 3/8"-24 1" Fully Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00445 3/8"-24 1" Fully Threaded ASTM A574 UNF 9/16" 3/8" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA00876 3/8"-24 1 1/8" Fully Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00289 3/8"-24 1 1/8" Fully Threaded ASTM A574 UNF 9/16" 3/8" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA00957 3/8"-24 1 1/4" Fully Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00447 3/8"-24 1 1/4" Fully Threaded ASTM A574 UNF 9/16" 3/8" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA00879 3/8"-24 1 3/8" Fully Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00290 3/8"-24 1 3/8" Partially Threaded ASTM A574 UNF 9/16" 3/8" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA00959 3/8"-24 1 1/2" Fully Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00449 3/8"-24 1 1/2" Fully Threaded ASTM A574 UNF 9/16" 3/8" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA00041 3/8"-24 1 3/4" Fully Threaded ASTM A574 UNRF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00961 3/8"-24 1 3/4" Partially Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00451 3/8"-24 1 3/4" Partially Threaded ASTM A574 UNF 9/16" 3/8" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA00042 3/8"-24 2" Fully Threaded ASTM A574 UNRF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00963 3/8"-24 2" Partially Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00453 3/8"-24 2" Partially Threaded ASTM A574 UNF 9/16" 3/8" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA00227 3/8"-24 2 1/4" Fully Threaded ASME B18.3, ASTM A574 UNRF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00964 3/8"-24 2 1/4" Partially Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00043 3/8"-24 2 1/2" Fully Threaded ASTM A574 UNRF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00965 3/8"-24 2 1/2" Partially Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00454 3/8"-24 2 1/2" Partially Threaded ASTM A574 UNF 9/16" 3/8" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA00998 3/8"-24 2 3/4" Partially Threaded ASTM A574 UNRF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00228 3/8"-24 3" Fully Threaded ASME B18.3, ASTM A574 UNRF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00967 3/8"-24 3" Partially Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01004 3/8"-24 3 1/4" Partially Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00999 3/8"-24 3 1/2" Partially Threaded ASTM A574 UNRF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01000 3/8"-24 4" Partially Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00634 3/8"-24 4 1/2" Partially Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01005 3/8"-24 4 3/4" Partially Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01001 3/8"-24 5" Partially Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01002 3/8"-24 5 1/2" Partially Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01003 3/8"-24 6" Partially Threaded ASTM A574 UNF 9/16" 3/8" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00902 7/16"-14 3/8" Fully Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01146 7/16"-14 1/2" Fully Threaded ASTM A574 UNRC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01562 7/16"-14 5/8" Fully Threaded ASME B18.3, ASTM A574, ASTM B117 UNC 21/32" 7/16" Zinc-Flake-Coated Alloy Steel 170000 psi Rockwell C37
0009FA01147 7/16"-14 5/8" Fully Threaded ASTM A574 UNRC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01148 7/16"-14 3/4" Fully Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01149 7/16"-14 7/8" Fully Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01563 7/16"-14 1" Fully Threaded ASME B18.3, ASTM A574, ASTM B117 UNC 21/32" 7/16" Zinc-Flake-Coated Alloy Steel 170000 psi Rockwell C37
0009FA01150 7/16"-14 1" Fully Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00458 7/16"-14 1" Fully Threaded ASTM A574 UNC 21/32" 7/16" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA01151 7/16"-14 1 1/8" Fully Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01564 7/16"-14 1 1/4" Fully Threaded ASME B18.3, ASTM A574, ASTM B117 UNC 21/32" 7/16" Zinc-Flake-Coated Alloy Steel 170000 psi Rockwell C37
0009FA01152 7/16"-14 1 1/4" Fully Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00459 7/16"-14 1 1/4" Fully Threaded ASTM A574 UNC 21/32" 7/16" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA00904 7/16"-14 1 3/8" Fully Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01565 7/16"-14 1 1/2" Fully Threaded ASME B18.3, ASTM A574, ASTM B117 UNC 21/32" 7/16" Zinc-Flake-Coated Alloy Steel 170000 psi Rockwell C37
0009FA01153 7/16"-14 1 1/2" Fully Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00460 7/16"-14 1 1/2" Fully Threaded ASTM A574 UNC 21/32" 7/16" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA01566 7/16"-14 1 3/4" Fully Threaded ASME B18.3, ASTM A574, ASTM B117 UNC 21/32" 7/16" Zinc-Flake-Coated Alloy Steel 170000 psi Rockwell C37
0009FA01154 7/16"-14 1 3/4" Fully Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00461 7/16"-14 1 3/4" Fully Threaded ASTM A574 UNC 21/32" 7/16" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA00044 7/16"-14 2" Fully Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01567 7/16"-14 2" Partially Threaded ASME B18.3, ASTM A574, ASTM B117 UNC 21/32" 7/16" Zinc-Flake-Coated Alloy Steel 170000 psi Rockwell C37
0009FA01155 7/16"-14 2" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00462 7/16"-14 2" Partially Threaded ASTM A574 UNC 21/32" 7/16" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA01568 7/16"-14 2 1/4" Partially Threaded ASME B18.3, ASTM A574, ASTM B117 UNC 21/32" 7/16" Zinc-Flake-Coated Alloy Steel 170000 psi Rockwell C37
0009FA01156 7/16"-14 2 1/4" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00045 7/16"-14 2 1/2" Fully Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01569 7/16"-14 2 1/2" Partially Threaded ASME B18.3, ASTM A574, ASTM B117 UNC 21/32" 7/16" Zinc-Flake-Coated Alloy Steel 170000 psi Rockwell C37
0009FA01157 7/16"-14 2 1/2" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01158 7/16"-14 2 3/4" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00046 7/16"-14 3" Fully Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01570 7/16"-14 3" Partially Threaded ASME B18.3, ASTM A574, ASTM B117 UNC 21/32" 7/16" Zinc-Flake-Coated Alloy Steel 170000 psi Rockwell C37
0009FA01159 7/16"-14 3" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01160 7/16"-14 3 1/4" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01571 7/16"-14 3 1/2" Partially Threaded ASME B18.3, ASTM A574, ASTM B117 UNC 21/32" 7/16" Zinc-Flake-Coated Alloy Steel 170000 psi Rockwell C37
0009FA01161 7/16"-14 3 1/2" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01162 7/16"-14 3 3/4" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01572 7/16"-14 4" Partially Threaded ASME B18.3, ASTM A574, ASTM B117 UNC 21/32" 7/16" Zinc-Flake-Coated Alloy Steel 170000 psi Rockwell C37
0009FA01163 7/16"-14 4" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00705 7/16"-14 4 1/2" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00706 7/16"-14 5" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01164 7/16"-14 5 1/2" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01165 7/16"-14 5 3/4" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01166 7/16"-14 6" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01167 7/16"-14 6 1/2" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01168 7/16"-14 7" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01169 7/16"-14 7 1/2" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01170 7/16"-14 8" Partially Threaded ASTM A574 UNC 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00905 7/16"-20 3/8" Fully Threaded ASTM A574 UNF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01372 7/16"-20 1/2" Fully Threaded ASTM A574 UNF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA02319 7/16"-20 3/4" Fully Threaded ASTM A574 UNF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01227 7/16"-20 7/8" Fully Threaded ASTM A574 UNF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00597 7/16"-20 1" Fully Threaded ASTM A574 UNF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00463 7/16"-20 1" Fully Threaded ASTM A574 UNF 21/32" 7/16" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA00906 7/16"-20 1 1/8" Fully Threaded ASTM A574 UNF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00598 7/16"-20 1 1/4" Fully Threaded ASTM A574 UNF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00907 7/16"-20 1 3/8" Fully Threaded ASTM A574 UNF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00599 7/16"-20 1 1/2" Fully Threaded ASTM A574 UNF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00464 7/16"-20 1 1/2" Fully Threaded ASTM A574 UNF 21/32" 7/16" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA02320 7/16"-20 1 3/4" Fully Threaded ASTM A574 UNF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00600 7/16"-20 2" Partially Threaded ASTM A574 UNF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00465 7/16"-20 2" Partially Threaded ASTM A574 UNF 21/32" 7/16" Zinc-Plated Alloy Steel 170000 psi Rockwell C37
0009FA01374 7/16"-20 2 1/4" Partially Threaded ASTM A574 UNRF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00601 7/16"-20 2 1/2" Partially Threaded ASTM A574 UNRF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA01392 7/16"-20 2 3/4" Partially Threaded ASTM A574 UNRF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00602 7/16"-20 3" Partially Threaded ASTM A574 UNRF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00070 7/16"-20 3 1/4" Partially Threaded ASTM A574 UNF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
0009FA00603 7/16"-20 3 1/2" Partially Threaded ASTM A574 UNRF 21/32" 7/16" Black-Oxide Alloy Steel 170000 psi Rockwell C37
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