Metallics JSSW171 Washers 5/8 Flat SS (Jar 100)

Yes. The JSSW171 is a 5/8 inch flat washer, with a 17/32 inch inside diameter hole. That 17/32 bore is the standard clearance for a 5/8 inch bolt or threaded rod, so it slips over the shank without binding while still bearing on the material around the hole.

They're stainless steel, which is why they get specified for exterior strut runs, rooftop equipment, wet or washdown areas, and anywhere a plated steel washer would rust and streak. Pair them with stainless bolts and nuts to keep the joint from setting up dissimilar metal corrosion.

Yes. The 17/32 inch hole clears 5/8 inch rod, and stainless construction suits it to the exposed and damp overhead runs where galvanized washers eventually bleed rust. For a trapeze you'd still need the matching 5/8 inch stainless nuts and the strut or channel itself; the jar of 100 covers washers only.

One hundred washers, packed in a jar rather than a bag or box. The jar is the ordering unit, so a single purchase gets you a full 100 piece count on the shelf or in the van, weighing 2.85 pounds.

A flat washer like the JSSW171 spreads the load and protects the surface under the nut or bolt head. It does not resist loosening from vibration. On a metal to metal joint, which is the application this washer is rated for, the common practice is a flat washer against the material plus a split lock washer under the nut, or a locking nut, where vibration is a concern. If the joint is static, the flat washer alone is what's normally used.