Which statement about fasteners in BOMs is true?

• A. Fasteners do not need to be listed in BOMs
• B. Fasteners must appear in assembly drawings/BOM
• C. Fasteners should be described only by quantity
• D. Fasteners should be included only if specified by vendor

Answer: (B)

Fasteners are an essential part of any assembled product, and the bill of materials (BOM) is the authoritative list of every part needed to build the product. Including fasteners in the BOM and in the assembly drawings ensures you have the exact items required—correct type, size, material, finish, and quantity—so procurement, fabrication, and assembly can be done accurately and consistently. If fasteners were described only by quantity, you wouldn’t know the precise screw or bolt specifications, which can lead to wrong parts being used or parts not fitting properly. Relying on vendor supply alone can miss mismatches between what’s needed and what a vendor happens to stock, creating gaps in documentation and traceability. By listing fasteners in the BOM and showing their placement in the assembly drawings, every team member has clear guidance on what to use and how much to order, ensuring reliable fabrication and assembly.