Your first description is better than the second.
ASME Y14.100-2004, Section 5.2 says this:
The title is the name by which the drawing or item will be known and consists of a basic name and modifier, when required, to differentiate like items.
The following rules apply to all titles:
(a) The title shall be as brief as possible, describe the item, and distinguish between similar items.
(b) The title shall consist of a noun or noun phrase (basic name). Modifiers may be used to distinguish between items with the same basic name.
(1) A modifier may be a single word or phrase. The first modifier narrows the concept established by the basic name, and succeeding modifiers continue the process.
(2) The conjunction"or" and preposition"for" shall not be used.
(c) The noun or noun phrase establishes the basic concept of an item.
For what it's worth, my company interprets the that standard as:
"SCREW, PAN HEAD" is the noun phrase, and "10-32x15/32" is the modifier. So, all our screws (and nuts, and washers, etc) follow your first option.
I'd go a step further and say that "SCREW" is the noun, then "PAN HEAD" is a modifier and "10-32 X 15/32" is a second modifier. But I think we are all in agreement that the first example is better.
Thank you all for the answers.
We try to adhere to this description method. It has shorter descriptions and your search's can be narrowed by the first abbreviation.
SHCS = SOCKET HEAD CAP SCREW, EXAMPLE: SHCS, .25-20 X 2
FHCS = FLAT HEAD CAP SCREW, EXAMPLE: FHCS, .25-20 X 2
PHCS = PAN HEAD CAP SCREW, EXAMPLE: PHCS, .25-20 X 2
When searching on the abbreviated title your results should only be that style of fastener.
You might have to publish a list of the abbreviations you are planning on using so that everyone will understand.
We had great success.
We do this too, although I know we do not conform to the standards. For socket head screws we use SHCS, FHCS, and BHCS. But for machine screws we use "Flat Head Screw Phillips" or "Pan Head Screw Phillips". I assume your PHCS is for a Phillips or slotted pan head, but your FHCS is ambiguous because it could be socket head, Phillips, slotted, torx etc. Maybe you only use one type at your facility so you might not have any ambiguity issues.
Actually our descriptions that show up in BOMs are pretty thorough. That way the assembler doesn't need to decipher the part number to know which hardware to grab. For example:
HEX BOLT 1/2-13 X 3, STEEL, GRADE 5, ZINC PLATED
PAN HEAD SCREW PHILLIPS M3 X 0.5 X 6, STEEL, ZINC PLATED
FHCS 10-32 X 3/8, STEEL, BLACK OXIDE