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✔ Includes 80 Pcs, 8 Sizes, 1/4-20UNC Stainless Steel 304 Hex Socket Button Head Cap Screws --Meets/exceeds SAE/ANSI/ASME B18.3BT --Screw head style: Button, head diameter: 7/16", head height: 1/8" ; screw drive style: internal hex drives also known as hex socket drives, hex size: 5/32" mm --Thread diameter: 1/4" (0.25"±0.004", tested) , Thread Pitch : 20 TPI, thread length from 3/8" to 2": 1/4-20 x 3/8, 1/4-20 x 1/2, 1/4-20 x 5/8, 1/4-20 x 3/4, 1/4-20 x 1, 1/4-20 x 1-1/4, 1/4-20 x 1-1/2, 1/4-20 x 2 --Material: Stainless Steel 304, High Strength and Anti-corrosion in Various Environments ✔ Includes 80 Pcs 1/4-20UNC Nuts --Meets/exceedsANSI/ASME B18.2.2 --Thread Pitch : 20 TPI --Thicknes: 0.219", Outside Hex Size: 0.433" --Material: Stainless Steel 304, High Strength and Anti-corrosion in Various Environments ✔ Includes 80 Pcs Φ1/4 Inches --Meets/exceedsANSI/ASME B18.22.1(SAE) --Thicknes: 0.066", Outside Diameter: 0.630", Inner Diameter: 0.286" --Material: Stainless Steel 304, High Strength and Anti-corrosion in Various Environments ✔ Includes 1 Pcs hex key, hex size: 5/32", to drive these screws conveniently and easily, material: chrome-vanadium steel, nickel plated, higher strength, anti-rust ✔ Easy to store: These Screws, Nuts, Washers and Hex Key Packed In a Sturdy Easy-use Storage Case, Organized Conveniently and Easily [ Package Contains ] 1/4-20 x 3/8----10 Pcs 1/4-20 x 1/2----10 Pcs 1/4-20 x 5/8----10 Pcs 1/4-20 x 3/4----10 Pcs 1/4-20 x 1------10 Pcs 1/4-20 x 1-1/4--10 Pcs 1/4-20 x 1-1/2--10 Pcs 1/4-20 x 2-------10 Pcs Total of Screws---80 Pcs Nuts--------------80 Pcs Washers----------80 Pcs Hex Key ----------1 Pcs