Lessons learned - Wheel cylinders and sealing stainless lines

stupid question coming..... will Grainger sell to me if i just walk in or is it just tradesmen with established accounts?
we have a Grainger in my town, ive obviously never tried to shop there.
In 2023 I needed a small amount of an oddball zerk fitting they showed available on their website. Grainger was the only place who would sell less than 50 or 100. I ordered and paid for them online and picked them up at the store 20 miles from here. No issues.