Wire Thread Inserts

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Wire Thread Inserts

Wire Thread Inserts for Aerospace and Defense

FDH Aero supplies wire thread inserts for aerospace and defense programs that need a reliable, repairable threaded connection in a material too soft or too thin to hold a fastener on its own. Browse the catalog below to find a part by number, or read on for the application context behind it.

What Are Wire Thread Inserts

Wire thread inserts are precision-formed coils of stainless steel wire, wound into a spring-like shape, that install into a tapped hole to create a durable internal thread. Rather than cutting threads directly into a soft or thin parent material, which strips under repeated assembly or heavy load, the insert takes the wear itself and spreads clamping force evenly across the full thread engagement. That's why wire thread inserts show up so often in aluminum, magnesium, and other lightweight materials common in aircraft structures. When a thread strips or a hole needs to be repaired to its original specification, a wire insert restores a full-strength threaded connection without re-engineering the part around a larger fastener.

Wire Inserts for Aerospace and Defense Applications

Wire inserts for aerospace and defense work show up anywhere a design calls for a threaded connection in a material that can't reliably hold one on its own:

Airframe and structural repair: restoring stripped or damaged threads in aluminum and magnesium components to original print specification
Engine and accessory housings: threaded connections that need to hold under vibration and thermal cycling without loosening
Avionics and electronics enclosures: lightweight housings where a full-metal boss isn't practical, but the thread still needs to hold
Ground support and tooling: fixtures and equipment that see frequent fastener removal and reinstallation over the equipment's service life
MRO and field repair: field-level thread repair kits that restore a damaged hole without machining a new part

Wire Insert Types and Configurations

Wire thread inserts are generally available across a few standard configurations, and the right one for a given print usually comes down to matching what's already specified:

Free-running inserts for general-purpose threaded connections where the fastener needs to turn freely
Screw-locking inserts for applications where vibration resistance matters and the connection needs extra resistance to backing out
A range of thread sizes and lengths to match the parent material thickness and the fastener being used

If you're not sure which configuration a print calls for, FDH Aero's hardware team can confirm the correct part number before you request a quote.

Why Source Wire Thread Inserts Through FDH Aero

FDH Aero has supplied c-class aerospace and defense components for more than 60 years, with over 650,000 square feet of inventory space and operations across 15 countries. Sourcing wire thread inserts through that footprint gives a program more than just a part number:

Single-source consolidation: order wire inserts alongside nut plates, key-locking inserts, and the rest of FDH Aero's hardware catalog instead of managing a separate vendor
VMI-ready: programs already running vendor-managed inventory with FDH Aero can add wire inserts to that same replenishment setup
Documentation on request: certifications of conformance and traceability paperwork are available for aerospace hardware orders where applicable
Global reach, local support: the same 15-country footprint and local decision-making that backs the rest of FDH Aero's hardware catalog applies to wire insert orders

About FDH Aero

FDH Aero is a global aerospace and defense supply chain partner, distributing hardware, electrical, chemical, and consumable products, plus value-added services, to OEM and aftermarket customers. With more than 1,500 employees and locations in 15 countries, FDH Aero positions itself as a trusted aerospace supply chain partner built on local people, local inventory, and local decision-making, backed by a large enough catalog to cover a program's hardware needs beyond any single product line. Browse the FDH Hardware division page for the full breadth of fastener and hardware lines carried alongside wire inserts.

Request Wire Thread Inserts from FDH Aero

FDH Aero stocks and distributes wire thread inserts and supports orders from single-part quotes through production quantities. Browse the full FDH Aero hardware catalog to find related fastener categories, or contact FDH Aero's team if you need help matching a part number to your specification. Request a quote for wire thread inserts, or search the catalog above by part number to add items directly to a quote request.

FAQs

What's the difference between a wire thread insert and a key-locking insert?

Both restore or reinforce threads in soft or thin materials, but they install differently. A wire thread insert is a coiled wire that screws into a tapped hole. A key-locking insert has external keys that press into keyways cut into the parent material, locking it in place without threading it in. Which one a design calls for usually comes down to the print specification.

What's the difference between free-running and screw-locking wire inserts?

A free-running insert allows the mating fastener to turn freely once installed, which is standard for most general-purpose threaded connections. A screw-locking insert has a deformed coil section that grips the fastener threads, adding resistance to loosening under vibration. Screw-locking is the more common choice in applications where a connection can't be checked or retightened often.

Does FDH Aero provide certifications of conformance with wire insert orders?

FDH Aero can supply certifications of conformance and material traceability documentation for wire thread insert orders as required by your purchase order. Confirm your documentation requirements when you request a quote.

What's the lead time on wire thread insert orders through FDH Aero?

Lead time depends on the specific part number and order quantity. Contact FDH Aero with your part numbers and quantities for current availability and lead time.

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Wire Thread Inserts