The convention comes from Roman numerals: C for one hundred, M for one thousand. It is standard in fastener pricing and appears on purchase orders, quotes and price lists without ever being explained, because everyone in the industry is assumed to know it.
The danger is that M is also a natural abbreviation for million in most other contexts, and for nothing at all in a general-purpose extraction model. A line reading 5M EA at $42.50/C means five thousand pieces priced at $42.50 per hundred — a $2,125 line. Read M as a units marker and you have a five-piece order.
The quantity unit and the pricing unit are also independently specified. A line can be quantified in thousands and priced per hundred on the same row, which is correct and normal and looks like an error to anything applying a single conversion.
Why it matters on an order desk
This is the highest-consequence silent failure in fastener order entry: the error is a factor of 100 or 1,000, and it passes every plausibility check that a human eye applies at speed. FrontBeacon shows the conversion arithmetic on screen rather than performing it invisibly, and blocks the line when the units cannot be resolved.
Related terms
- Unit of measureA unit of measure is the quantity basis a line is expressed in — each, box, carton, per hundred, per thousand, feet, pounds — and it determines how many physical pieces an order line represents.
- Pack quantityPack quantity is the number of pieces in a saleable container for a specific SKU, and it varies by item rather than following any general rule.