Metric Flat Head Cap Screw Black-Oxide Alloy Steel Partial Thread M20 * 2.5 * 120mm Grade 12.9 [Allen Key] length_6-1-2 The strength of the bolt

The strength of the bolt should match the strength of the nut to prevent damaging threads

The inside threads have a 6-8 thread

They're also known as D-shackles

The screw has a length of 5-1/2" and a thread of 7/8-9

The screw has a length of 4" and a thread of 1-8

Metric Flat Head Cap Screw Black-Oxide Alloy Steel Partial Thread M20 * 2.5 * 120mm Grade 12.9 [Allen Key] length_6-1-2 The strength of the boltThis flat head cap screw has a length of 120mm with a threading of M20 * 2. 5mm [Partially Threaded]. It is made of Black Oxide Alloy Steel and thus provides a mild resistance to corrosion in dry environments. The cup point and the Grade 12. 9 increases its strength against the pressure and has a tensile strength and hardness of 170,000 psi Rockwell C39. Furthermore, it features a shear strenght of 102,000 psi. ISO Metric Pitch Coarse threads are an