Flat Socket Cap Screws in 18-8 (A2) Stainless Steel Metric by Brighton Best

The slots are for the insertion of a cotter pin to secure the nut when used with a drilled shank fastener

5/8-11 x 3 1/2 Hex Cap Screw SS 316 (A4)

8 x 1 1/4 Star Flat Decking Screws w/ Nibs W

1 1/4-7 Finished Hex Nut SS 316 (A4)

M16-2.00 x 130 Flat Socket Cap Screw 12.9 DIN 7991 Black Oxide 3/4 Hex Lag Screws Hot Dipped Galvanized Flat Socket Cap Screws inM16 2. 00 x 130 Flat Socket Cap Screw 12. 9 DIN 7991 Black Oxide . Alloy Flat Socket Head Cap Screws from Brighton Best. Hardness of RC 38 43, meets or exceeds DIN 7991. Manufactured from heat treated alloy steel, 1960 series.