Vividia VQ-R39 borescope has 2. The length of the cable camera can be 1 meter (model: VQ-R3910), 2 meter (model: VQ-R3920), or 30 meter (model: VQ-R39300).9mm, 3.4" LCD color screen, 3.
.1/4"-20 x 1/2" Hot Dip Galvanized Steel Coarse Thread Carriage Bolts 100PK The square section grips into the part being fixed (typically wood), preventing the bolt from turning when the nut is tightened.
Machine screws are used in fastening nearly all types of hard materials.#12-24 x 5/8 in Phillips Flat Machine Screw, Zinc Plated Steel, 100 PK Commonly used with flat or lockwashers. Especially useful in metal-to-metal or where heavy duty fastening is required..
.072" x 4" 18-8 Stainless Steel Extension Springs 3PK Their turns are normally touching in the unloaded position, and they have a hook, loop or some other means of attachment at each end.3/4" x 0.