ROADFORMER T-bolt Hose Clamp 4" (108–116mm) 2-Pack — 304 Stainless with Nylon Locknut

ROADFORMER 4" T-bolt hose clamp is a heavy-duty stainless-steel clamp sized to tighten from 108mm to 116mm (4.25"–4.57") and sold as a 2-pack for secure, leak-resistant hose connections.

Designed for 4" nominal ID hoses, these clamps combine a 3/4" 304 stainless steel band, a 300-series 1/4"-28 bolt, a floating bridge and a nylon-insert locknut to deliver consistent clamping force and corrosion resistance. They suit automotive, marine, industrial and agricultural hose joins where a robust seal and long service life matter. Before ordering, verify your hose outer diameter and wall thickness to ensure the clamp’s working range fits your application.

How do these T-bolt clamps hold hoses securely?

The clamp uses a heavy gauge 304 stainless steel band with a precision T-bolt and floating bridge to spread pressure evenly around the hose perimeter. A nylon-insert locknut resists vibration loosening while the wide band reduces local hose distortion, producing a tight, even seal without cutting into the hose material.

• Wide 3/4" stainless band prevents hose pinch and improves seal stability
• Floating bridge distributes torque evenly during tightening
• 1/4"-28 300-series bolt and nylon locknut for vibration resistance

Will these clamps fit my 4" hose and how to check fit?

ROADFORMER clamps tighten from 108mm to 116mm (4.25"–4.57"), matching typical 4" nominal ID hoses when measured by outer diameter. Because hoses vary by material and wall thickness, measure the hose outer diameter (O.D.) while assembled or refer to the hose spec sheet to make sure it falls within the clamp’s working range.

• Working range: 108mm–116mm (4.25"–4.57")
• Recommended hose wall thickness: 3mm–6mm (SAE standard)
• Measure O.D. rather than nominal ID for accurate fit

What materials and construction make these clamps durable?

The clamp band and bridge are made from 304 stainless steel for corrosion resistance, while the bolt is 300-series stainless steel for strength. The nylon-insert locknut improves retention under vibration and the overall design resists loosening and electrochemical degradation in harsh environments.

• 304 stainless steel 3/4" band resists rust and wear
• Floating bridge prevents localized stress on the hose surface
• Nylon-insert locknut improves loosening resistance in vibration-prone settings

How do I install and tighten a ROADFORMER T-bolt clamp?

Installation is straightforward: slip the clamp over the hose, position it over the fitting or coupling, align the bolt and bridge, then tighten using a wrench or socket until the desired clamp pressure is reached. Avoid over-torquing; tighten until the hose is snug and leak-free but not compressed to the point of deformation.

• Slide clamp on, position over joint, then align bridge and bolt
• Tighten with wrench or socket until secure—do not over-torque
• Re-check after first heat cycle or pressure test for final adjustment

Who is this for: These ROADFORMER 4" T-bolt clamps are aimed at mechanics, fleet operators, marine techs, fabricators and DIYers who need a reliable, heavy-duty clamping solution for 4" hoses. They work well on intercooler piping, coolant lines, turbocharger hoses, intake plumbing, agricultural equipment and many industrial fluid systems where a robust, corrosion-resistant connection is required. The 2-pack format is convenient for replacement pairs or multiple assemblies.