Ultraflex L7 Stainless Steel Ball Joint

The Ultraflex L7 / 38078U Stainless Steel Ball Joint is a detachable cable-end fitting for compatible Ultraflex C2, C8 and MACHZero engine control cables. Its 10-32 UNF female thread attaches to the cable’s moving threaded rod, while a supplier-published 6mm / M6 ball stud provides the articulated connection to a throttle, gear-shift, gearbox or other compatible operating linkage.

The L7 is the closest documented functional Ultraflex equivalent to the Multiflex K9 / LM-K-9 quick-release ball joint. Both products use a 10-32 UNF cable connection, stainless-steel construction and a published 6mm or M6 stud, but no manufacturer document reviewed provides a formal one-to-one cross-reference.

Product Identification

• Brand: Ultraflex
• Model: L7
• Manufacturer part number: 38078U
• Distributor catalogue format: U38078
• Common UK product code: 4-L7
• Supplier-listed extended SKU: 1A0038078U
• Supplier-listed EAN: 8031164380785
• Product category: Engine control cable end fitting
• Product type: Stainless-steel ball joint
• Alternative descriptions: Quick-release ball joint, detachable ball joint, cable-end ball joint or spherical rod end
• Material: Stainless steel
• Stainless-steel grade: Not published
• Finish: Not published
• Cable-side thread: 10-32 UNF female
• Supplier-published ball-stud size: 6mm / M6
• Current catalogue cable compatibility: C2, C8 and MACHZero
• Legacy catalogue compatibility: CZero and compatible 33C-style cables
• Cable capacity: One control cable
• Primary function: Connects a moving control-cable rod to a mechanical operating linkage
• Typical applications: Gear shift, throttle and compatible push-pull engine controls
• Closest Multiflex equivalent: K9 / LM-K-9
• Equivalent status: Functional cross-brand equivalent; direct fit must be confirmed
• Control cable included: No
• Cable outer clamp included: No
• Maximum working load: Not published

What Is the Ultraflex L7 Used For?

The L7 forms the articulated connection between the threaded moving rod of a compatible engine control cable and the engine, gearbox or other operating lever moved by that cable.

It can form part of a correctly specified:

• Gear-shift control installation
• Throttle-control installation
• Inboard engine control system
• Outboard engine control system
• Sterndrive control installation
• Gearbox selector connection
• Compatible choke or engine-stop control
• Ultraflex C2 cable installation
• Ultraflex C8 cable installation
• Ultraflex MACHZero cable installation
• Compatible universal 33C / 3300 cable installation

The spherical joint allows limited angular movement between the cable rod and operating lever. This reduces the need for perfectly straight alignment while the cable pushes or pulls the linkage.

What Is Included?

• 1 x Ultraflex L7 / 38078U stainless-steel ball-joint assembly

Available catalogue information does not provide a complete loose-parts list. The ball stud is shown as part of the connection format, but the supply of a separate nut, washer or other installation hardware should be confirmed before installation.

Not included unless expressly stated:

• Ultraflex C2 control cable
• Ultraflex C8 control cable
• Ultraflex MACHZero control cable
• Universal 33C control cable
• Remote control lever or control box
• Engine throttle lever
• Gearbox selector lever
• Cable outer-casing clamp
• Ultraflex L2 cable clamp block
• Ultraflex L3 shim and clamp block
• Ultraflex L14 cable clamp block
• Separate cable locknut
• Installation-specific washers or spacers
• Additional linkage hardware
• Multiflex K9 ball joint
• Steering cable
• Steering helm
• Hydraulic steering components
• A second L7 ball joint

Which Ultraflex Control Cables Are Compatible?

Current catalogue and supplier data list the L7 for:

• Ultraflex C2
• Ultraflex C8
• Ultraflex MACHZero

Older Ultraflex catalogue material also describes the L7 as fitting C2, C8, CZero and all compatible 33C-style cables. Complete fitment still depends on the cable-end design, thread engagement, linkage geometry and required operating load.

Is the L7 Suitable for Universal 33C / 3300 Control Cables?

The L7 is commonly catalogued for 33C-style engine control cables, and Ultraflex legacy data describe it as fitting C2, C8, CZero and all 33C-style cables.

Before installing it on another brand of universal cable, confirm:

• 10-32 UNF male cable-end thread
• Sufficient usable cable thread
• 6mm / M6 stud mounting requirement
• Available joint articulation
• Operating-lever position
• Cable travel
• Push-pull operating load
• Body and release-sleeve clearance
• Cable outer-casing restraint

A matching thread does not prove that the complete connection is suitable.

How Does the L7 Ball Joint Work?

1. Screw the L7 onto the cable’s 10-32 UNF moving rod.
2. Secure the ball stud to the engine or gearbox linkage.
3. Align the joint housing with the ball head.
4. Retract the release sleeve where required.
5. Push the joint fully onto the ball.
6. Allow the sleeve to return to its retained position.
7. Pull-test the joint before operating the control.
8. Operate the linkage through its complete range.

Supplier descriptions identify the L7 as a quick-release ball joint, but the current Ultraflex catalogue description states only stainless-steel ball joint 10-32 UNF.

What Thread and Stud Size Does the L7 Use?

• Cable-side thread: 10-32 UNF
• Cable-side thread orientation: Female
• Supplier-published ball stud: 6mm / M6
• Connection type: Detachable spherical joint

Is the Multiflex K9 a Direct Equivalent to the Ultraflex L7?

The Multiflex K9 / LM-K-9 is the closest documented functional equivalent.

The two fittings share:

• Stainless-steel ball-joint construction
• 10-32 UNF female cable connection
• Published 6mm or M6 ball stud
• Detachable spherical linkage design
• Suitability for universal engine control cables
• Use with compatible throttle and gear-shift linkages

Ultraflex L7:

• Model L7
• Manufacturer part number 38078U
• Common UK code 4-L7
• Listed for C2, C8 and MACHZero
• Stainless-steel grade not published
• Current Ultraflex catalogue does not detail the release mechanism
• Supplier-published body diameter: 14mm
• Supplier-published overall length: 40mm
• Supplier-published threaded length: 14mm

Multiflex K9:

• Item code K9
• Extended part reference LM-K-9
• Listed for EC-033 and EC-133
• Housing specified as 300 Series stainless steel
• Polished finish
• External spring-operated release method explicitly described
• Overall dimensions not published

No formal manufacturer cross-reference was found. Confirm the complete dimensions, stud location, cable thread engagement, release action and operating load before treating either fitting as a direct replacement.

Can the Multiflex K9 Material Specification Be Applied to the L7?

No. Multiflex states that the K9 housing is manufactured from 300 Series stainless steel. Ultraflex and its current suppliers describe the L7 as stainless steel but do not publish a stainless grade in the information reviewed.

Do not describe the L7 as 300 Series, AISI 304, AISI 316 or marine-grade 316 stainless steel unless a current Ultraflex technical document confirms the grade.

How Does the L7 Differ From the Ultraflex L25?

Ultraflex L7:

• Spherical ball-joint connection
• Detachable or supplier-described quick-release format
• Allows angular movement around the ball
• 10-32 UNF cable thread
• Supplier-published 6mm / M6 stud

Ultraflex L25:

• Forked clevis connection
• Straddles the operating lever
• Uses a transverse clevis pin
• 10-32 UNF cable thread
• Published 7.1mm jaw width and 6.4mm pin in supplier data

Both are cable-end fittings, but they use different engine-linkage geometries and are not automatically interchangeable.

How Does the L7 Differ From the Ultraflex L12?

Ultraflex L7:

• Ball-joint connection
• Attaches to a ball stud
• Provides spherical articulation
• Detachable connection format

Ultraflex L12:

• Cable-end pivot
• Uses a different pivot-style linkage connection
• Does not use the same ball-joint housing

The current catalogue lists both for C2, C8 and MACHZero cables, but the receiving linkage must match the selected fitting.

Does the L7 Secure the Cable Outer Casing?

No. The L7 attaches to the cable’s moving threaded rod.

The stationary cable outer casing must be secured separately using a suitable product such as:

• Ultraflex L2 cable clamp block
• Ultraflex L3 shim and clamp block
• Ultraflex L14 cable clamp block
• A remote-control-box retaining system
• An engine-side cable support
• Another approved outer-casing restraint

Is the L7 Stainless Steel?

Yes. Ultraflex catalogue and supplier data identify the L7 as a stainless-steel ball joint.

The available information does not publish the stainless-steel grade, surface-finish specification, passivation specification, salt-spray test duration, ball-stud material grade, spring material grade or internal retaining-component material.

What Are the L7 Dimensions?

One specialist supplier publishes:

• Body diameter: 14mm
• Overall length: 40mm
• Ball stud: M6
• Published threaded length: 14mm

The supplier does not clearly state whether the 14mm threaded length refers to the cable-side threaded bore or the ball-stud thread. These dimensions are not shown in the current Ultraflex catalogue reviewed and should be checked against the physical product where fit is critical.

Ultraflex does not publish in the current catalogue the ball-head diameter, female-thread depth, release-sleeve travel, maximum articulation angle, product weight, maximum linkage thickness or maximum working load.

Does the L7 Connect One or Two Control Cables?

The L7 connects one control cable to one operating linkage. An installation with separate throttle and gear-shift cables may require one L7 for each cable, depending on the engine and linkage arrangement.

Is the Ball Stud or Mounting Hardware Included?

The product is sold as a ball-joint fitting and supplier data identify a 6mm / M6 stud. However, current Ultraflex catalogue data do not provide a complete packaging breakdown.

Confirm whether the ball stud, mounting nut, flat washer, spring washer, spacer, cable locknut or other retaining hardware is supplied.

Can the L7 Be Used with Steering Cables?

No. The L7 is an engine control cable accessory. It is not intended for rotary steering cables, rack-and-pinion steering cables, steering link arms, hydraulic steering cylinders, hydraulic hoses or engine tie bars.

Is a Maximum Working Load Published?

No maximum working load, proof load or fatigue rating is published in the current L7 information reviewed. Select the fitting according to the control-cable rating, engine or gearbox operating force, ball-stud mounting strength, lever geometry, required articulation and complete installation load.

Construction and Design

• Ultraflex engine control cable ball joint
• Model L7
• Manufacturer part number 38078U
• Distributor catalogue format U38078
• Common UK product code 4-L7
• Supplier-listed EAN 8031164380785
• Stainless-steel construction
• Stainless-steel grade not published
• 10-32 UNF cable-side thread
• Supplier-published 6mm / M6 ball stud
• Detachable spherical linkage connection
• Supplier-described quick-release operation
• Designed for one mechanical control cable
• Current catalogue compatibility with C2
• Current catalogue compatibility with C8
• Current catalogue compatibility with MACHZero
• Legacy compatibility with CZero and 33C-style cables
• Suitable for compatible shift and throttle linkages
• Closest Multiflex functional equivalent: K9 / LM-K-9
• Does not secure the cable outer casing
• Control cable supplied separately
• Remote control supplied separately
• Loose mounting hardware not fully itemised
• Maximum articulation not published
• Maximum working load not published

Installation and Safety

• Confirm that the model is L7
• Confirm part number 38078U, U38078 or catalogue code 4-L7
• Verify compatibility with C2, C8, MACHZero or another correctly matched 33C-style cable
• Confirm that the cable has a 10-32 UNF male threaded rod
• Inspect the cable and joint threads for damage
• Start the L7 on the cable rod by hand
• Do not cross-thread the fitting
• Maintain sufficient thread engagement
• Use the cable manufacturer’s specified locking method
• Confirm that the 6mm / M6 stud suits the operating lever
• Verify the stud-hole diameter and lever thickness
• Secure the stud using the correct installation hardware
• Align the ball-joint housing with the ball head
• Push the joint fully into the retained position
• Confirm that any sliding sleeve returns completely
• Pull-test the joint before operating the control
• Ensure the joint articulates freely throughout the linkage movement
• Avoid excessive side loading
• Avoid twisting the control-cable rod
• Secure the stationary cable outer casing separately
• Maintain the cable manufacturer’s minimum bend radius
• Operate the control through its complete range
• Confirm positive forward, neutral and reverse positions where used for shifting
• Confirm that the throttle returns fully to idle
• Ensure the cable does not bottom out or overtravel
• Check that surrounding structure cannot operate the release sleeve
• Inspect the housing, sleeve, ball and stud regularly
• Replace worn, loose, cracked, distorted or corroded components
• Do not exceed the rating of the lowest-rated control-system component
• Do not operate the control system if the joint binds or releases unintentionally

Engine shift and throttle systems are safety-critical. Installation should follow the current Ultraflex, engine, gearbox and remote-control instructions and should be completed by a competent marine technician.

Key Features

• Ultraflex L7 stainless-steel control-cable ball joint
• Manufacturer part number 38078U
• Distributor catalogue format U38078
• Common UK code 4-L7
• 10-32 UNF cable-side thread
• Supplier-published 6mm / M6 ball stud
• Compatible with Ultraflex C2 cables
• Compatible with Ultraflex C8 cables
• Compatible with Ultraflex MACHZero cables
• Legacy catalogue compatibility with CZero and 33C-style cables
• Detachable spherical cable-to-linkage connection
• Supplier-described quick-release operation
• Allows angular movement between cable and operating lever
• Suitable for compatible throttle and gear-shift applications
• Connects one cable to one operating linkage
• Closest functional equivalent to Multiflex K9 / LM-K-9
• Supplier-published 14mm body diameter
• Supplier-published 40mm overall length
• Supplier-published 14mm threaded length
• Stainless-steel grade not published
• Cable outer casing requires a separate clamp
• Control cable supplied separately
• Loose installation hardware not fully itemised
• Maximum articulation angle not published
• Maximum working load not published