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BOM Callout Examples
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Purchased Part/BOM Examples

Below are starting points for common purchased items that may be used in a BOM. Any special notes, needs or requirements, just add to callout. If you are not sure what to write, check an old drawing, your supplier or purchasing department. Make sure that the callout is exact and complete so there are no mistakes or questions and the correct part is used in the assembly.

Part

Callout

Example

Hex head cap screw (bolt) (ref)

HHCS, thread X length

HHCS, 1/2-13 UNC X 2

Socket head cap screw

SHCS,  thread X length

SHCS, 1/2-13 UNC X 2

Socket head shoulder screw (bolt)

SHSS, shoulder diameter X length

SHSS, 1/2  X 2

Flat washer (ref)

FW, diameter (of bolt)

FW, 1/2

Lock washer

LW, diameter

LW, 1/2

Nut (ref)

HEX NUT, thread

HEX NUT, ½-13 UNC

Bushing (not flanged)

BSHG, ID X OD X Length

BSHG, Ø.5ID X Ø.75OD X .5

Spring (best to have a part number)

SPRING, TYPE, OD X length, ends, notes

SPRING, COMP., Ø2OD X 6, FLAT ENDS

Parts by number

Supplier, part, number, what ever

DODGE, BEARING, P/N123456-A

Pin

PIN, OD X length

PIN, Ø.75 X 1

Cotter pin, Split pin (ref)

COTTER PIN, OD X length

COTTER PIN, Ø1/8 X 1