Genuine Mazda Plastic Push-On Flange Nut / Trim Retainer • B100-68-615

Genuine Mazda B100-68-615 Plastic Push-On Flange Nut / Trim Retainer

Replacement Genuine Mazda plastic push-on flange nut for Mazda MX-5 models across multiple generations and assorted applications throughout the wider Mazda vehicle range as shown in the compatibility table.

This plastic retaining fastener is used to secure insulation, trim panels, covers and similar lightweight vehicle components to a compatible mounting stud or locating pin.

Unlike a conventional threaded nut, the retainer pushes directly onto the mounting stud. Its internal gripping profile holds the component in place, while the broad flange spreads the retaining load across the surrounding trim or insulation material.

B100-68-615 is a multi-purpose Mazda fastener used in assorted positions. Its precise location and the number fitted vary according to the vehicle model, production specification and component being retained.

This listing supplies one Genuine Mazda plastic push-on flange nut. Vehicles can use several of these retainers, with six or more commonly fitted across different applications.

Replacement may be required where an original retainer has split, distorted, become loose, lost its grip or been damaged during removal of an insulation panel, trim component or protective cover.

• Part type: Plastic push-on flange nut / trim retainer
• Primary use: Retains trim, insulation, covers and similar lightweight components
• Mounting type: Push-on
• Fitting position: Assorted positions throughout the vehicle
• Vehicle application: Used across multiple Mazda models and MX-5 generations
• Quantity per vehicle: Application-dependent; several may be fitted
• Quantity supplied: One retainer
• Material: Plastic
• Brand: Genuine Mazda
• Part No.: B100-68-615
• Also referenced as: B10068615
• Earlier Mazda reference: EC02-68-615 / EC0268615
• Important SKU correction: B100-68-615

Fitment advice: This is a multi-purpose Mazda retaining fastener rather than a component assigned to one fixed vehicle position. Compare the original retainer, mounting-stud diameter, flange size and surrounding panel arrangement before installation.

Other items to consider: When replacing this part, you may also want to consider purchasing any adjoining trim clips, push-in studs, insulation retainers or panel fasteners that have become brittle or damaged during removal.

Useful tools / consumables: Plastic trim-removal tools, small non-damaging pry tool, panel-clip removal pliers and a clean tray for retaining removed fasteners.

Difficulty guide: DIY Difficulty: Easy. Installation normally involves aligning the retainer with the compatible mounting stud and pressing it evenly into place. Avoid excessive force that could split the plastic retainer or damage the adjoining panel.

Why Genuine Mazda? Genuine Mazda trim fasteners are manufactured to the intended flange dimensions, gripping profile and material specification. Using the correct OE retainer helps maintain secure panel retention and compatibility with the original Mazda mounting stud and surrounding trim.

What’s in the box: One Genuine Mazda plastic push-on flange nut / trim retainer, part number B100-68-615.

Installation notes: Remove any remains of the damaged retainer and inspect the mounting stud and adjoining panel before fitting the replacement. Align the retainer squarely with the stud and press it into place evenly until the panel is held securely. Do not reuse a retainer that has split, stretched or lost its gripping tension.