ROADFORMER 4" T-Bolt Hose Clamp 108–116mm (4") 2-Pack — Stainless Steel Spring-Loaded Constant Tension

ROADFORMER 4" heavy-duty spring-loaded T-bolt hose clamps are stainless-steel, auto-adjusting clamps designed to keep 4" (108–116mm) hoses sealed under changing temperatures and pressure.

These clamps combine a wide stainless-steel band, a robust T-bolt fastener, and a zinc-plated carbon spring to hold consistent tension on hoses with 3–6mm wall thickness. Built for demanding automotive and industrial environments, the spring-loaded design compensates for thermal expansion and vibration so connections stay tight without manual re-torquing. Each pack contains two clamps sized for nominal 4" hose installations where a reliable, corrosion-resistant seal is essential.

How does the spring-loaded T-bolt maintain a leak-free connection?

The integrated spring automatically adjusts the clamp’s tension as the hose and fitting expand or contract with temperature and pressure changes. This continuous compensation reduces the risk of loosening that can happen with fixed clamps, preserving an even sealing pressure along the hose circumference.

• Zinc-plated carbon spring provides automatic tensioning across thermal cycles
• Floating bridge spreads load evenly to avoid hose pinching
• Nylon-insert locknut prevents loosening from vibration
• Stainless-steel construction resists corrosion in harsh environments

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

These clamps fit hoses with outside diameters that fall within the working range of 108–116mm (4.25"–4.57") and are intended for hose wall thicknesses from 3mm to 6mm. Measure the hose outside diameter, including any insulation or couplers, before ordering to ensure the clamp will sit correctly and engage the T-bolt fully.

• Working range: 108mm–116mm (4.25"–4.57")
• Suitable for 3mm–6mm hose wall thickness
• Designed for nominal 4" hoses—measure OD to confirm
• Two clamps per pack for paired or backup installations

What applications are these T-bolt clamps best suited for?

ROADFORMER spring-loaded T-bolt clamps are intended for high-demand installations where temperature swings, vibration, or pressure changes occur. Common uses include turbocharger charge pipes, intercooler couplers, coolant lines, marine hose connections, and heavy equipment ducting.

• Turbo charge air cooling and intercooler couplings
• Primary engine coolant and heater hoses
• Marine and off-highway equipment exposed to corrosion
• Racing and performance engines with frequent thermal cycling

How durable and serviceable are these clamps over time?

Constructed from stainless-steel band and bolt plus a robust zinc-plated spring, these clamps are built to resist corrosion, vibration, and mechanical fatigue. The floating bridge and nylon locknut add reliability and reduce maintenance, allowing longer intervals between inspections in harsh service conditions.

• Stainless-steel band and bolt for long-term corrosion resistance
• Zinc-plated spring resists rust while retaining elasticity
• Floating bridge reduces hose wear and distributes clamping force
• Nylon insert locknut secures torque against vibration loss

Who is this for: ROADFORMER 4" spring-loaded T-bolt hose clamps are aimed at mechanics, racers, fleet operators, and DIY enthusiasts who need dependable hose connections in engines, turbo systems, marine craft, and heavy machinery. Choose these clamps when you require an automatic tensioning solution that handles thermal cycling, vibration, and corrosive conditions without frequent retightening.