20min? Try an hour or more. Customer waiting. LOL Oh, and the shop is down a bay now.
Local parts stores are charging closer to $5 each for singles, some common ones in the $3-$4 range. If you don't know how to check thread size you can be paying $10+ for "application specific" plugs like the 10mm headed M14x1.5 for the GM 1.4 turbo. Or you can be like me and order one for a 99 civic EX, aluminum pan, so you get the longer of the two plugs versus the stubby one for the stamped pan. It's a 17mm now but they're like $3 and easily sourced as nearly every aluminum pan honda uses that plug. You really only need M14x1.5, and M12 by 1.25/1.5. Outside of subaru and some weird stuff that'll work. I typically convert cars with rubber seals to crush washers, as the latter is much more available, cheaper, and the aftermarket rubber seals don't seem to last long before weeping. I change crush washers, so it's no big deal to me.
At the risk of complete thread derailment - automotive shops typically have ZERO respect for anyone doing the work. Z E R O. Don't care about wasting the customers time or looking stupid either. So yes, basic things like the half dozen common lug nuts, drain plugs, etc are not possible to stock. Can't be done, it's like pushing a rope.
Frankly, I feel bad for the people who just want their car fixed. Wastes everybody's time. But hey, I'm told over and over on GJ that I'm a dumb employee who doesn't know anything unlike the brilliant 300IQ business owner. So perhaps I'm not intelligent enough to understand. Your oil pan "wore out" because the shop refuses to supply crush washers. "Just snug it up". The RTV gaskets rotted out from acidity because "synthetic" is not VW508 spec and isn't going 10,000 miles. "It's still synthetic" The lug nuts need extracted because it's "not worth fighting over" for the front desk until the wheel can't be removed and lube-**** ruined several. "I don't care just get the ******* wheels off". Top down problem.