ROADFORMER T-Bolt Hose Clamp 3.54–3.86in Range — 2-Pack, 304 Stainless with Nylon Locknut

ROADFORMER 3.75-inch T-bolt hose clamp is a heavy-duty stainless steel clamp kit sized for hoses with a 3.54"–3.86" outer diameter, offered as a two-piece pack for high-vibration and high-pressure connections.

If you need a durable clamp that holds a consistent sealing force around larger hose assemblies, these ROADFORMER T-bolt clamps are built to resist corrosion and maintain pressure in demanding automotive, industrial, agricultural, and off-road applications. The clamps combine a 1/4"-28 stainless bolt, a floating bridge band, and a nylon-insert locknut to give a secure, repeatable fit on hoses with a 90mm–98mm (3.54"–3.86") outer diameter. They are designed for use where worm-drive clamps fall short — particularly where vibration, torque, or repeated cycles occur.

How do these T-bolt clamps perform under vibration and pressure?

These clamps use a T-bolt and a floating bridge band to distribute compression evenly around the hose, which reduces pinching and localized stress. The nylon-insert locknut locks the bolt in place to resist loosening during vibration, and 304 stainless steel components provide long-term resilience against rust and corrosion.

• Uniform sealing pressure to prevent leaks under dynamic loads
• Nylon locknut prevents bolt back-off in high-vibration settings
• 304 stainless hardware resists chemical exposure and moisture

What hose sizes and measurements should I verify before buying?

These clamps are specified for a hose outer diameter (O.D.) range of 3.54" to 3.86" (90mm–98mm). Measure the hose O.D. rather than the inside diameter (I.D.) and compare against this working range to ensure a correct fit—overlapping ranges or misreading O.D. vs I.D. can cause fitment issues.

• Working range: 3.54"–3.86" (90mm–98mm) — measure hose outer diameter
• Not suitable if your hose O.D. falls outside that band without alternate sizing
• Two-clamp package lets you secure multiple lines or keep a spare

Which components make up the clamp and why do they matter?

The clamp assembly combines a 1/4"-28 stainless steel bolt, a 3/4" floating bridge band made from 304 stainless steel, and a nylon-insert locknut. Each part contributes to consistent clamping force, resistance to corrosion, and long-term reliability when exposed to outdoor and mechanical environments.

• 1/4"-28 stainless bolt — provides tensile strength for tightening
• 3/4" floating bridge band — evens compression around the hose circumference
• Nylon insert locknut — secures the bolt against vibration-driven loosening

How should I use and maintain these clamps for best results?

Tighten to a firm, even torque to compress the hose onto its fitting without over-crushing the hose material. Periodically inspect for corrosion or loosening, especially where salt, oils, or abrasive debris are present. Replace clamps if threads strip, the band deforms, or the locknut no longer holds.

• Use a torque wrench or hand tool and tighten evenly to avoid kinking the hose
• Inspect periodically in harsh environments and after heavy vibration events
• Replace rather than reusing clamps that show deformation or damaged threads

Who is this for: ROADFORMER’s 3.75" T-bolt clamps are intended for technicians, mechanics, fleet operators, and hobbyists who need rugged, repeatable hose connections. They’re well suited for coolant, intake, intercooler, turbocharger, heavy-truck, agricultural, and industrial hose applications where reliable sealing under vibration and pressure is critical. Each purchase includes two clamps so you can outfit multiple lines or keep a service spare on hand.