5578531-B

General-purpose commercial hardware including brackets, clamps, hinges, handles, latches, catches, hold-downs, plugs, and mounting hardware not covered by a more specific class.

Reading the part number. 5578531-B is a drawing-style part number assigned by the original design activity rather than a published standard; the -B suffix denotes a dash variant — a specific configuration of base drawing 5578531. For drawing-number parts, the NSN is often the easiest way to confirm you have the right item — this one cross-references to the stock number below.

Price in context. Across the 420 items we currently stock in FSC 5340 (Hardware, Commercial), published unit prices run from $0.35 to $14,018.40. At $7.89, this item sits well below the class median of $59.58 — commodity hardware usually bought in volume.

Who orders 5578531-B. Aircraft owners and MRO shops replacing standard hardware, machine shops and OEMs filling a bill of materials, and government contractors sourcing against NSN 5340-01-185-8821. You can order by part number or by stock number — it is the same item, the same published price, and the same quote form.

Applicable standards. MS, MIL-DTL, and commercial standards; steel, stainless, aluminum, and plated finishes.

Need this part modified, or a similar part made to your print? See our U.S.-based CNC machining services and aerospace machining capability.