The FC43® panel fastener is the latest structural panel fastener from Howmet Fastening Systems. This panel fastener has an advanced solid stud design that provides superior shear and tensile strength while offering additional features over existing designs. The FC43® structural panel fastener is self-retaining/self-captivated and has “hold-out” capability in all positions. Because this model has fewer components, it reduces inventory costs and simplifies installation. Additionally, the FC43® structural panel fastener’s large strength-to-size ratio results in higher weight savings potential.

Ultimate reliability in high-performance aircraft is achieved with the Mark IV^™ structural panel fastener. Quick operation is assured through multiple lead threads, and exceptionally high reusability is achieved with the Flat Beam™ locking feature, which provides a 1,500 seated life cycle.

High strength, quick operation, an encapsulated receptacle and an exceptionally high life cycle make LiveLock^™ structural panel fasteners the optimal choice for high-performance aircraft and electronic applications. The spring-loaded ratchet design ensures positive locking action and vibration resistance without relying on prevailing torque. Additionally, the LiveLock™ panel fastener’s multiple lead thread permits rapid installation and removal.

Combining structural soundness and accessibility, Milson structural panel fasteners are in use on many aerospace applications. The Milson system is one of the only structural panel fasteners that features variable length sleevebolts and receptacles, allowing single “dash number” sleevebolts or receptacles to be used on a given structure.

Our TriMil^™ fastening system eliminates problems associated with the self-locking or prevailing torque feature of other similar fasteners. In addition, its positively locked retaining ring secures the sleevebolt to the cover when it is opened, eliminating the potential for FOD and ensuring reliable operation. Consequently, TriMil^™ fasteners help avoid maintenance problems and aircraft safety concerns.

Our Camloc^® structural panel fasteners are used on stressed panels and provide structural supportive joints with high cycle life. They are vibration resistant and have multiple lead threads for quick operation. Part series consist of 4F, 80F and 17F series.

Our QR^™ fastening system is lightweight, has a small envelope and is quick operating. Most versions lock and unlock in two turns. The QR^™ fastener qualifies to MIL-F-22978 and meets MS17731 and MS17732. Positive stud retention is featured. Flush or protruding head styles and various recess configurations are available. An optional stud hold-out grommet that provides bottom-flush condition is available. Receptacle provides 0.020 in. minimum radial float.

Our range of 1/4-turn fasteners offers secure locking and quick unlocking with a simple 90° rotation of the stud, allowing for convenient and reliable servicing within high-reuse environments. These fastening systems provide excellent resistance to loosening from vibration. Unlike threaded fasteners, our 1/4-turn fasteners do not rely on the elasticity of the joint and fastener materials for preload.

Howmet Fastening Systems supplies a wide variety of captive screws for any type of application where it is important that the attachment screw for a panel stays with that panel. Numerous head styles, recesses, sizes, configurations and materials offer options that fulfill the requirements of any captive screw application. Fully retracting captive screws automatically retract flush with the panel when released from mating threads, which allows equipment to be removed or installed without the possibility of jamming or damage.

Grommets and hole-liners are used in non-metallic and soft or thin metallic structures. The precision thin-wall sleeves are flared, bonded or riveted to the structure and protect the parent material from damage due to fastener reuse and hole misalignment.