AR1540272 Outlet Bayonet Bolt 3/8" 3650PSI - 1965

The AR North America AR1540272 is an outlet unloader bayonet banjo bolt constructed to secure and seal the outlet connection on Annovi Reverberi unloader valve assemblies, delivering a reliable, leak-free fluid path in high pressure cleaning equipment and industrial misting systems.

Why You'll Love It

Here's why the AR1540272 outlet bolt earns its place on your parts shelf over generic fasteners or improvised hardware.

• Precise fit for AR unloaders – The AR1540272 is designed for unloader valve assemblies in pressure washers, fitting the outlet port geometry of common AR unloader bodies used on XM, RK, and RR series pumps. That purpose-built match reduces the risk of leaks or misalignment from the moment you thread it in.

• Improved sealing performance – Featuring a banjo-style design with correct shoulder length and an integrated O-ring, this bolt compresses sealing surfaces evenly across the outlet joint, maintaining stable high-pressure sealing even during aggressive start–stop cleaning cycles.

• Supports system safety – A correctly secured outlet bolt allows the unloader to work as intended. Unloader valves divert water back to the pump when triggered, preventing dangerous pressure spikes that occur when flow stops suddenly at the gun. A loose or mismatched bolt undermines that critical safety function.

• Reduced downtime – Instead of trial-and-error with generic hardware, the AR1540272 drops right into place. It is compatible with various unloader models, so you can keep a small quantity on hand and cover multiple machines in your fleet.

• Built for demanding pressure washer use – Constructed from brass and engineered to withstand the vibration, moisture, and chemical exposure common in commercial cleaning environments, this bolt holds up through thousands of pressure cycles.

What Makes AR1540272 Different

Most field repairs rely on whatever banjo bolt is closest at hand. The result is often a sign of trouble: seepage, restricted flow, or thread damage to the brass unloader body.

AR1540272 is built differently:

• Engineered for the AR outlet unloader bayonet interface – The bayonet-style geometry matches AR unloader bodies precisely, preventing rotation and ensuring repeatable positioning every time the bolt is installed. It is compatible with various high-pressure triplex plunger pumps across the AR lineup.

• Optimized passage for flow and pressure – The central bore and cross-drilled holes are sized to support the flow demands of AR unloaders rated up to 3650 PSI and 5.5 GPM. Unloader valves can regulate pressure by adjusting spring tension, but that regulation only works correctly when the outlet passage flows freely-an undersized or blocked bolt starves the system.

• OEM-quality finish and thread consistency – A 3/8-inch thread configuration with controlled pitch and shoulder height prevents galling, cross-threading, or uneven clamping on soft brass bodies. Every dimension is held to the same standard as original factory hardware.

How It Works in Your Pressure Washer System

Understanding where the AR1540272 sits and what it does takes only a few seconds. The bolt serves as a specialized fluid connection, not a structural fastener-its job is directing pressurized water, not holding frame components together.

1. Position the banjo fitting – Place the outlet hose or hard-line banjo fitting against the unloader body so the bolt passage aligns with the outlet port. Confirm that fresh sealing washers or the integrated O-ring are seated properly.

2. Install the AR1540272 bolt – Thread the outlet bolt through the banjo fitting and into the unloader body. Tighten to the recommended torque of 265 in-lb, compressing the seals evenly without distorting the brass body.

3. Secure a leak-free high-pressure outlet – Once torqued, the bolt creates a sealed, flow-through path from the unloader outlet into your high-pressure hose. The unloader valve can now control pressure and bypass as designed, and the AR1540272 helps restore optimal operational efficiency in pump systems that were previously leaking or underperforming.

Product Details

Below are the key technical details buyers and technicians need when identifying the correct AR outlet bolt.

• Material / Finish: Brass

• Thread Size: 3/8"

• Flow Passage: Central bore with radial cross-drilled holes directs water from the unloader outlet through the banjo fitting-"flowthrough" means the bolt is internally relieved, not solid.

• Typical Operating Environment: The AR1540272 functions effectively in pressure washing and industrial misting systems operating at pressures up to 3650 PSI and flows up to 5.5 GPM. Note that continuous bypass operation can overheat water above 140°F, so correct unloader function-supported by a properly sealed outlet-matters.

• Cross-Reference Numbers: The AR1540272 replaces older part numbers such as AR1260580 and AR1540430, helping you match legacy equipment.

• What's Included: The outlet bolt is sold Individually. Additional washers, complete O-ring kits, or full unloaders must be sourced separately if needed.

Compatibility & Fitment

This section helps you quickly determine whether AR1540272 is the correct outlet bolt for your AR unloader or pump model.

The AR1540272 is specified as an outlet unloader bayonet banjo bolt for Annovi Reverberi (AR North America) systems. It is compatible with various unloader models in the Gymatic 3/B family-including the AR20242 and related configurations-where a 3/8-inch outlet port is used. It works alongside popular AR triplex plunger pumps in the XM, RK, RR, and SXM series where a dedicated outlet banjo bolt is required.

Check before you buy:

• Verify the part number "AR1540272" (or older equivalents 1260580 / 1540430) against your pump or unloader exploded parts diagram or service manual.

• Confirm the outlet port thread size is 3/8 inch.

• If the original bolt is missing, measure the banjo fitting bore and thread engagement length, and compare with your equipment's documentation.

• Ensure the unloader model uses a banjo-style outlet connection rather than a direct-threaded fitting.

Installation & Replacement Steps

Safety first: Depressurize the system completely, shut off the engine or motor, and relieve any trapped pressure before touching the outlet bolt. Wear appropriate personal protective equipment.

1. Tools you'll need – Correct wrench size for the bolt head, torque wrench capable of 265 in-lb, clean rags, and replacement sealing washers or O-rings if the existing ones show wear.

2. Remove the old outlet bolt – Loosen the existing banjo bolt carefully. Catch any residual water with a rag. Remove the banjo fitting and inspect the old sealing washers.

3. Inspect sealing surfaces – Check the unloader body port face, banjo fitting contact surfaces, and washers or O-rings for scoring, pitting, or deformation. Replace any damaged components before proceeding.

4. Install the new AR1540272 bolt – Position sealing washers or confirm the integrated O-ring is seated. Insert the new bolt through the banjo fitting and into the unloader body. Tighten evenly to the recommended torque of 265 in-lb.

5. Test for leaks and correct operation – Bring the system up to pressure gradually. Check for drips or weeping around the bolt. Confirm that the unloader switches correctly between spray and bypass mode-pressure spikes occur when flow stops suddenly at the gun, so verify the unloader responds smoothly.

Frequently Asked Questions

These are the questions technicians and equipment owners ask most often about the AR North America AR1540272 outlet unloader bayonet banjo bolt.

Is AR1540272 compatible with all AR unloaders? No. It is designed for specific outlet unloader configurations that use a 3/8-inch banjo bolt connection. Always verify against your pump or unloader's parts diagram or model-specific service manual before ordering.

Can I substitute a standard hardware-store banjo bolt? It's not recommended. Generic bolts risk incorrect thread engagement, poor sealing, or flow restriction. The AR1540272's bore, cross-hole alignment, and shoulder length are engineered for AR unloader bodies-substituting introduces leak and safety risks.

Do sealing washers or O-rings come with this bolt? The outlet bolt is typically supplied with an integrated O-ring for sealing. However, additional copper washers or backup seals should be ordered separately using the correct AR part numbers if your application requires them.

What torque should I use to tighten the outlet bolt? The recommended torque for installing the bolt is 265 in-lb. If your torque wrench isn't available, tighten firmly without forcing, then bring the system to pressure and check for leaks.

How often should I replace the outlet bolt? Replace the AR1540272 when you see visible wear, corrosion, thread damage, or experience repeated leak issues at the outlet joint. Condition-based replacement is more practical than a fixed calendar schedule for this component.

Ready to Secure Your AR Unloader Outlet?

The AR1540272 is the correct outlet unloader bayonet banjo bolt for a wide range of AR North America pressure washer systems. Constructed to match the thread, shoulder, and flow-passage requirements of AR unloader bodies, it eliminates the guesswork and risk that come with generic substitutes.