BAC Standard Parts for Boeing Aircraft Applications

BAC standard parts use Boeing-controlled part-number or specification systems to identify hardware and components for structures and systems. Depending on the specification, a BAC designation may relate to fasteners, fittings, clamps, brackets, bushings, seals, electrical hardware, or other aviation components.

This catalog organizes BAC part-number records. It complements the aviation parts catalog when a maintenance record, drawing, Illustrated Parts Catalog, or purchase document already provides a BAC identifier.

How to Read a BAC Part Number

Preserve the complete BAC number as documented. Spaces, hyphens, prefixes, suffixes, size codes, dash numbers, and revision characters may distinguish dimensions, materials, finishes, configurations, or performance requirements. Do not normalize differently formatted numbers unless approved technical data confirms the same item.

When reviewing a catalog record, compare:

• Complete BAC part number and revision.
• Item description and manufacturer.
• CAGE Code, NSN, or NIIN.
• Material, finish, dimensions, and configuration.
• Aircraft model and serial-number effectivity.
• Required certification and traceability.

A listed record identifies a catalog association; it does not confirm installation approval, interchangeability, or current stock.

BAC Parts and Other Aerospace Standards

BAC designations are Boeing-associated specifications or part identifiers used for aerospace hardware and components. They are not automatically equivalent to AS, MS, or NAS part numbers. An approved cross-reference, supersession record, Boeing drawing, or maintenance publication is needed before substituting one standard for another.

Related aerospace hardware may also be identified through AS standard parts or MS standard parts specifications. NAS designations may apply to related fasteners and hardware, but matching size or function alone does not establish equivalence.

Verify BAC Part Applicability

Confirm the aircraft family, model, variant, line or serial-number range, installed system, and modification status. Use the Illustrated Parts Catalog, structural repair manual, component maintenance manual, engineering drawing, or other approved technical data.

Request BAC Standard Parts

Select the relevant listing to submit an RFQ. Provide the exact BAC part number, manufacturer, quantity, condition, delivery deadline, and documentation requirements. ASAP Semiconductor uses these details to confirm availability, pricing, lead time, condition, and supporting records during quotation.