Thank you to everyone for the further replies.
I've phoned Zoro about successive shortfalls three times. I’m still waiting for deliveries of two sizes of Nord-Locks from them, so the saga may not be over yet, in spite of me asking that the pickers be made aware of the problem.
After I'd pointed out the slightly garbled description (adapted from Nord-Lock's own) accompanying some of the sizes (though not the ones bizarrely branded Workshop) saying each washer is "comprised of" (sic) a pair, there was no resistance to my claim that the washers operate, and Zoro's intention is clearly to supply them, in pairs, though I did wonder myself, along the lines suggested by Jason, whether they might respond by saying they supply them in halves, not as functioning pairs.
If the latter were the case, it would be a bit sadistic of them to have, as they do in some cases, minimum orders of one and five; you'd order ten and get five functioning washers; you'd order five and only get two functioning washers; you order one and get none! The first two situations happened to me.
I'm confident I'll get the full quotient from Zoro in the end; it's just a bit of a drag having to ring and then send yet another photo to "prove" the order is short, though of course a photograph can prove nothing of the kind. The photograph I’ve posted here, on the other hand, does, I hope, prove that the washers I’ve received are genuine Nord-Lock.
Anyway, I’m grateful for people’s patience and for the alternative sources that have been suggested. My moaning has at least been a useful displacement activity for work I can’t currently do in the workshop because I’m so pinned down looking after two very deserving parents who are still living in their own home whilst afflicted by indescribably debilitating dementia.
