The Fillister-Head Machine Screw, identified as part number AN509-10R4, is a fundamental piece of hardware utilized across various systems within the Beech T-34 Mentor aircraft. This specific screw belongs to the broad category of standard AN (Air Force-Navy) hardware, signifying its adherence to stringent military specifications for aviation use. Its primary role involves securing components where a robust, compact head is desirable, such as attaching access panels, fairings, interior trim, instrument mounts, or other non-structural and lightly structural assemblies throughout the airframe.
Specifications
- Part Number: AN509-10R4
- Standard: AN509 Series (Fillister Head Machine Screw)
- Material: Corrosion Resistant Steel (CRES), also known as Stainless Steel. This provides excellent resistance to corrosion, a critical factor in aviation environments.
- Head Type: Fillister Head, characterized by a cylindrical shape with a flat top, offering a clean, low-profile finish and strong driving characteristics.
- Drive Type: Typically slotted drive, designed for standard flat-blade screwdrivers.
- Stock: Out of Stock - On Backorder
- Manufacturer Part #: AN509-10R4
- Part#: AN509-10R4
Aircraft Fitment Finder
Returns & refund summary
- 30-day return window — with prior return authorization, unopened in original packaging.
- Restocking fee: 20% on unopened items, 30% on open-box items.
- Refund processing fee: 5.51% applies to all refunds (returns, cancellations, core-fee refunds) regardless of reason.
- Return shipping: paid by buyer.
- Non-returnable categories: installed/used parts, special-order or rebuilt items, programmed items (incl. ELTs), batteries, AOG-priority orders, international orders.
Full terms: Return Policy.
Authenticity & authorization
All parts sold by American Aviation Parts are genuine factory products sourced through authorized distribution channels. Our authorization status varies by brand — for some brands we are a direct authorized dealer; for others we are an independent reseller through authorized distribution. Either way, the part you receive is the same factory product, with standard documentation available on request.
See our full Manufacturer Authorizations page for the current per-brand status.
Need traceability paperwork?
If your installation requires FAA Form 8130-3, manufacturer Certificate of Conformance, or other traceability documentation, please call 1-877-722-8727 or email [email protected] before placing the order so we can confirm what is available for this part.
Shipping
Standard ground, expedited, and AOG shipping options are available at checkout. Full shipping-cost tiers and timelines are published on our Delivery Information page.
