Marson Rivet Nut

Marson Rivet Nut Tools: Permanent Threads, Professional Results

When it comes to adding strong, reliable threads to thin-gauge metal with no access to the backside, few names carry more authority than Marson. A brand under Howmet Fastening Systems, Marson has built a decades-long reputation as a go-to source for fastening professionals in automotive, aerospace, and industrial repair — and their rivet nut lineup is a prime example of why.

What Sets Marson Rivet Nuts Apart

Marson Rivet Nuts deliver low-cost, permanent thread placement in thin material while providing at least six full thread turns per application install. Easy installation can be completed by one operator with minimum training, and blind-side access is not required. Ideal for painted surfaces, they help increase production and reduce rework by eliminating the surface damage that can occur with other fastening methods.

Marson offers an extensive array of rivet nuts, poly-nuts, and thread-serts which provide efficient and cost-effective methods for permanently replacing threads in thin materials. Whether you're working on vehicle body panels, brackets, or sheet-metal enclosures, the Marson rivet nut family covers a wide range of thread sizes and flange configurations.

Marson Rivet Nut Product Series

The lineup spans several distinct series: the MRN Series features a flathead flange (thick wall) for applications requiring heavy push-out resistance; the MPN Series Poly-Nut offers a very small flange for a near-countersink profile; the MLR Series Large Flange Ribbed Rivet Nut provides increased turn-out resistance versus conventional rivet nuts; the MLC Series adds a closed end for thread sealing; and the MSR Series Small Flange low-profile Ribbed Rivet Nut enables a virtually flush install. This depth of selection means there's a Marson rivet nut solution suited to nearly any sheet-metal fastening scenario.

Dedicated Installation Tools Built for Rivet Nuts

Marson pairs its rivet nut inserts with a focused line of rivet nut installation tools engineered specifically for thread-setting work. The 325-RN and 425-RN hand tools offer lever-style action in both single-mandrel and kit configurations — the M34604 325-RN comes with a 1/4-20 mandrel and nosepiece, while the M34606 325-RNK kit includes mandrels for #10-24, #10-32, 1/4-20, 5/16-18, and 3/8-16 threads.

For those who need maximum versatility, the SRN-2 Klik-Turn is a standout performer. The M39400 SRN-2 features a positive-ratchet locking swivel head that turns a full 360° and holds in 40+ positions for increased productivity. Built with a heat-treated steel upper handle and precision die-cast high-strength aluminum alloy body, it sets steel and aluminum rivet nuts up to 1/4-20" and 6mm. The design also incorporates an adjustable stroke with positive locking, a patented fulcrum pin, and a quick-change mandrel.

For heavy-duty manual thread-setting, the RN-1 is ideal for installing larger-sized rivet nuts and threaded inserts in aluminum and steel, handling 10-24 to 3/8"-16 and 5mm to 10mm, with extra-long handles that provide excellent leverage. The HP-4x4 Multiplex Hand Tool features a patented design that allows a single tool to set a variety of sizes of both aluminum and steel rivets and rivet nuts.

Why Choose Marson for Rivet Nut Applications

Since its heritage under Howmet Fastening Systems, Marson has led fastening innovation with premium blind rivets, rivet nuts, and installation tools, serving aerospace, automotive, industrial repair, and OEM markets. Marson tools include engineered features like high-performance fulcrum pins, ergonomic grips, and quick-change mandrels. For shops and technicians who need reliable, repeatable thread installation without drilling and tapping, Marson's rivet nut tools and inserts deliver the performance and breadth of selection that professionals expect. Browse the full Marson brand catalog to explore the complete range.