Description
The female bonding fastener from Specialinsert’s F1 series threads a standard 3/8-16 bolt into a 38 mm round base designed for adhesive bonding rather than mechanical fastening. Zinc-plated steel construction resists corrosion in mixed-metal assemblies, and the flat base bonds to metal, composite, or plastic panels without drilling, welding, or riveting.
Where the Female Bonding Fastener Fits
This part pairs with Specialinsert M1 male threaded posts to create a through-panel or blind-hole connection point. Shops in aerospace and defense, marine fabrication, transportation, and sign and display work add threaded attachment points to panels that cannot be drilled or welded without compromising a finish, a seal, or a structural laminate. Countertop fabricators and cabinet shops bond the base to the underside of solid surface or engineered stone to create a hidden mounting point for brackets, supports, or leveling hardware. Mold makers use the same approach to add threaded lift points to cast tooling without machining a hole into a finished cavity surface.
How the Female Bonding Fastener Holds Up
Because the base bonds across its full surface area rather than concentrating load at a single drilled hole, the joint spreads stress evenly and avoids the stress riser that a drilled hole introduces into a thin panel or laminate. Zinc plating on the steel body eliminates the galvanic corrosion risk that shows up when bare steel touches aluminum or stainless in a marine or transportation assembly. The 38 mm base gives the adhesive enough bond area to carry rated pull-out and shear loads once the epoxy or acrylic bonding adhesive cures, and the female thread accepts standard 3/8-16 hardware for repeated assembly and disassembly after the bond sets.
Specifications
| Spec | Detail |
|---|---|
| Insert Type | F1 Female |
| Thread Size | 3/8-16 |
| Base Diameter | 38 mm (1.5 in) round |
| Material | Zinc-plated steel |
| Mounting Style | Through-hole or blind-hole, adhesive bonded |
| Pairs With | Specialinsert M1 male threaded post |
Order this fastener with a compatible structural adhesive rated for the substrate. Chemical Concepts stocks bonding adhesives sized to this base diameter in the bonding fasteners category. For adhesive selection guidance and cure time data across chemistries, Specialinsert publishes engineering resources covering surface prep and bond area calculations for the F1 series.
Need Help?
Need help matching adhesive chemistry to your panel material for this female bonding fastener? Call (800) 220-1966 or email [email protected].
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