1/4 inch Hex Head Bolts have a 7/16 inch hex head. The fastener length is measured under the head. The thread length is typically 7/8, but may vary. 18-8 Stainless Steel for general construction, industrial and marine applications.
3/8-16 x 2-1/4 Hex Head Tap Bolts, 37C225BTAPS
1/2-13 x 3-3/4 Carriage Bolt 18-8 Stainless Steel - FT (Box of
1/4-28 x 2 Stainless Steel Hex Head Cap Screw
1/4 Stainless Steel Hex Head Bolts
1/4-10 x 4-1/2 Hex Lag Bolt 18-8 SS (Box of 500)
Reviews for Hillman 18-8 Stainless Steel Pan Head Phillips Machine Screw 1/4 in. x 2 in.
1/2-13 Hex Head Bolts have a 3/4 hex head. The fastener length is measured under the head. The thread length is typically 1-1/4, but may vary. 18-8
1/2 -13 x 4 1/2 Hex Head Bolt, 18-8 SS
10-24 x 2 1/2 Hex Head Machine Screw 18-8 Stainless Steel – FMW Fasteners
2-56x1/4 Button Head Socket Cap Screw 18-8 Stainless Steel - MacDonald Industrial Supply