6 Replies Latest reply on Jan 26, 2015 5:52 PM by Jamil Snead

    Per ASME or ANSI, what is the correct description for screw?

    Ernie Lorenzo

      SCREW, PAN HEAD, 10-32 X 15/32

                      OR

      10-32 X 15/32 PAN HEAD SCREW

        • Re: Per ASME or ANSI, what is the correct description for screw?
          Tom Helsley

          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.

          • Re: Per ASME or ANSI, what is the correct description for screw?
            Wendy Mark

            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.

            • Re: Per ASME or ANSI, what is the correct description for screw?
              Rob Schmick

              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.

                • Re: Per ASME or ANSI, what is the correct description for screw?
                  Jamil Snead

                  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