I have had no problems with McMaster. So many companies withhold
payments for goods and services for up to 90 days that McMaster and
others are fed up with being a bank. Your company may have fallen
into this practice and had your account flagged for poor payment
history. The results being that they want payment with the order.

I order on open account and pay well within 30 days. No problems.

Your organization may have been the source of your credit problems.

Bob