Metric Single Banjo Bolts - Restricted - Stainless Steel

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Metric Stainless Steel Single Restricted Banjo Bolts – Precision Oil Flow Control for Turbochargers

Managing oil flow is critical for turbocharger performance and longevity. Our precision-engineered Metric Stainless Steel Single Restricted Banjo Bolts help regulate oil flow to turbochargers and other sensitive components. Manufactured in the United Kingdom from high-grade stainless steel, each bolt features a 1.5mm internal restriction and offers excellent durability, corrosion resistance, and precision fitment.

Why Choose Our Stainless Steel Restricted Banjo Bolts?

Optimised Oil Flow

Each banjo bolt features a 1.5mm internal restriction to limit oil flow through the bolt, making it suitable for turbocharger oil feed applications requiring controlled lubrication.
Durable & Corrosion-Resistant

Machined from high-quality stainless steel, these bolts offer exceptional corrosion resistance, making them ideal for long-term use in turbo oil feed systems.
Suitable for Turbocharger Oil Feeds

Restricted banjo bolts can be used where a turbocharger or oil-fed component requires a controlled oil supply rather than unrestricted flow.
Precision CNC Machined

Manufactured in the United Kingdom with precision-machined threads for accurate fitment in compatible turbo oil feed and hydraulic oil applications.
Available Metric Sizes

Available in M10 x 1.50 and M12 x 1.50, both with a 1.5mm internal restriction.

What is a Restricted Banjo Bolt?

A restricted banjo bolt is a hollow banjo bolt with a reduced internal flow passage. This limits the volume of oil passing through the bolt and can be useful when supplying components such as turbochargers that require controlled oil flow.

Installation

To ensure a proper seal, you will need two copper crush washers per banjo bolt (not included). These washers create the seal between the banjo bolt, banjo fitting, and component.

Bolt Type: Single Banjo Bolt Designed for use with a single banjo fitting
Head Type: Hex Head Standard spanner installation
Material: 303/304 Stainless Steel Excellent strength and durability
Finish: Natural Stainless Steel Corrosion-resistant
Manufactured In: United Kingdom Precision CNC machined

Flow Design: Restricted Limits fluid flow through the bolt
Restriction Size: 1.5mm Internal flow restriction
Seal Type: Crush Washers Two required for installation

Available metric stainless steel restricted single banjo bolt sizes and dimensions
Product Code	Thread	Restriction	Thread Length	Bolt Length Below Hex Head	Spanner Size
BLT-SGL-RES-SS-M10X15-15	M10 x 1.50	1.5mm	11mm	20mm	14mm
BLT-SGL-RES-SS-M12X15-15	M12 x 1.50	1.5mm	14mm	23mm	16mm

Turbo Oil Feeds
Oil Feed Systems
Performance Engines
Motorsport Applications
Hydraulic Oil Systems

Engine Oil
Lubricating Oil
Hydraulic Oil

Copper Crush Washers

Two crush washers are required for installation, one either side of the banjo fitting.

Free repair or replacement for two years from the date of purchase. Learn more

Frequently Asked Questions

What is a metric stainless steel single restricted banjo bolt?
A metric stainless steel single restricted banjo bolt connects a single banjo fitting to a compatible threaded component while limiting oil flow through its internal restriction. It is commonly used in turbocharger oil feed systems and other applications where controlled oil flow is required.
What restriction size do these banjo bolts have?
Both metric versions have a 1.5mm internal flow restriction.
What metric thread sizes are available?
The Metric Single Restricted Banjo Bolts are available in M10 x 1.50 and M12 x 1.50 thread sizes.
Why would I use a restricted banjo bolt on a turbocharger?
A restricted banjo bolt limits the amount of oil supplied through the turbo oil feed connection. This can be required on turbocharger installations where unrestricted oil flow would exceed the manufacturer's recommended oil supply.
Are these suitable for custom braided turbo oil feed hoses?
Yes, they can be used with suitable banjo fittings fitted to custom braided turbo oil feed hoses. The banjo bolt thread and dimensions must match the threaded port in the turbocharger or other component.
Do I need additional components for installation?
Yes. Two crush washers are required for each banjo bolt – one on each side of the banjo fitting. Copper Crush Washers are available separately.