Nico MK1 Shootbolt Bar Rod Extensions for uPVC Windows Lock

Nico Mark 1 Shootbolt Extension Window Lock Rods – Genuine Replacement Locking Rods for uPVC Windows

Restore your window security with precision-engineered Nico genuine shootbolt extensions.

Nico Mark 1 Shootbolt Extension Rods are genuine OEM replacement locking rods specifically designed for Nico Mark 1 centre window lock gearbox systems. Available in four size ranges to accommodate different window sash rebate sizes, these precision-manufactured extensions ensure your uPVC windows maintain optimal security and smooth operation. Each pair comes locked in the open position and ready to cut to length, allowing for exact fitting to your specific window configuration.

Manufactured from durable materials with an innovative break-away lug design, these shootbolt extensions are engineered to professional standards. The fixing lugs shear cleanly on first operation, allowing the rods to run freely thereafter while maintaining secure locking performance. Suitable for various window sash rebate sizes from 290mm up to 1360mm, these genuine Nico components offer reliable, long-lasting window security.

Key Benefits:

• Genuine Nico Quality – Authentic OEM replacement parts manufactured to exact specifications for guaranteed compatibility with Nico Mark 1 centre gearbox systems, ensuring reliable performance and longevity.
• Four Size Ranges Available – Comprehensive coverage from 290mm to 1360mm sash rebate sizes (EX1, EX2, EX5, EX6), eliminating the guesswork and ensuring you find the perfect fit for your window configuration.
• Cut-to-Length Design – Supplied locked in the open position and ready to trim to your exact requirements, allowing precise customisation for perfect alignment and smooth operation within your window frame.
• Intelligent Break-Away Lug System – Innovative fixing lugs hold the extensions securely during installation, then shear cleanly on first handle operation, allowing free movement while maintaining structural integrity and security.
• Precision Mushroom Cam Configuration – Each size features optimised mushroom cam placement (0-2 cams per extension) with 7.8mm cam height, delivering secure multi-point locking that meets modern security standards.
• Easy Identification System – Each rod corner features a stamped size code (EX1, EX2, EX5, or EX6), making it simple to identify existing rods and order exact replacements without measurement errors.
• Cost-Effective Window Restoration – Replace worn or damaged shootbolt extensions rather than the entire window lock system, saving money while restoring full security and smooth operation to your uPVC windows.
• Professional Installation Ready – Designed for straightforward fitting by DIY enthusiasts and trade professionals alike, with clear measurement guidelines ensuring successful first-time installation.

Product Specifications:

• Brand: Nico
• Product Type: Shootbolt Extension Window Lock Rods (Pair)
• Compatible System: Nico Mark 1 Centre Window Lock Gearbox
• Cam Height: 7.8mm
• Mushroom Cams per Extension: EX1 (0 cams), EX2 (1 cam), EX5 (2 cams), EX6 (2 cams)
• Available Size Ranges (Sash Rebate Size):
  • EX1: 290mm – 420mm
  • EX2: 420mm – 760mm
  • EX5: 760mm – 1060mm
  • EX6: 1060mm – 1360mm
• Material: Galvanised Steel
• Finish: Metallic Silver
• Installation Position: Supplied locked in open position, ready to cut to length
• Identification: Size code stamped on rod corner (EX1, EX2, EX5, or EX6)

CRITICAL MEASUREMENT NOTE: The size ranges shown represent the sash rebate size – the total length of the shootbolt rods and centre gearbox measured with the window in the open position, but EXCLUDING the protruding bolt tips. This is NOT the individual rod length. Always measure from the base of one shootbolt rod to the base of the other (excluding the extended bolt tips) to determine the correct size range required.

Pro Tips:

Pro Tip: Before ordering, check the corner of your existing shootbolt rods for the stamped size code (EX1, EX2, EX5, or EX6) – this is the quickest way to ensure you order the correct replacement. If the stamp is unclear or missing, measure your sash rebate size from the base of one shootbolt rod to the base of the other with the window in the open position (DO NOT include the extended bolt tips that protrude out). This sash rebate measurement includes both rods and the gearbox and determines which size range you need. Remember: EX3 and EX4 were discontinued as these sizes are covered by the other available ranges (MK2).

How to Measure Your Sash Rebate Size:

Selecting the correct shootbolt extension size is crucial for proper window operation and security. Follow these steps to measure your sash rebate size:

1. Open Your Window Fully: Ensure the window is in the fully open position with the handle turned to the open setting.
2. Measure the Sash Rebate Size (Excluding Extended Bolt Tips): With the window in the open position, measure from the base of one shootbolt rod to the base of the other shootbolt rod. This measurement includes both extension rods AND the centre gearbox, but DO NOT include the protruding bolt tips that extend out when the window is open. This is your sash rebate size.
3. Match Your Sash Rebate Size to the Correct Range: Compare your sash rebate measurement to the size ranges below and select the one that encompasses your measurement:
   • 290mm – 420mm sash rebate = Order EX1
   • 420mm – 760mm sash rebate = Order EX2
   • 760mm – 1060mm sash rebate = Order EX5
   • 1060mm – 1360mm sash rebate = Order EX6
4. Quick Identification Method: Alternatively, check the corner of your existing rods for the stamped size code and order the same.

Package Contents:

• 1 × Pair of Nico Mark 1 Shootbolt Extension Rods (Your selected size range)

Frequently Asked Questions:

Q: How do I know which size shootbolt extension I need for my window?
A: The easiest method is to check the corner of your existing shootbolt rods where you'll find a stamped size code (EX1, EX2, EX5, or EX6). Order the same size. Alternatively, with the window fully open, measure your sash rebate size from the base of one shootbolt rod to the base of the other (DO NOT include the extended bolt tips). This measurement includes both extension rods and the centre gearbox. Match your sash rebate measurement to the appropriate size range. For example, if your sash rebate measures 650mm, you need EX2 (420mm-760mm range).

Q: Why don't EX3 and EX4 sizes exist anymore?
A: Nico discontinued EX3 and EX4 from their MK1 range because the measurements these sizes covered are already accommodated by the other available size ranges (EX1, EX2, EX5, and EX6). This simplifies the product range without reducing coverage – all window sizes are still supported.

Q: What happens with the fixing lugs during installation?
A: The fixing lugs serve as temporary holders during installation, keeping the extensions locked in the open position while you cut them to length and fit them into your window. When you operate the window handle for the first time after installation, these lugs are designed to shear and break away cleanly, allowing the shootbolts to move freely for normal window operation.

Q: Can I use these extensions with other brands of window gearbox?
A: No, these shootbolt extensions are specifically engineered for Nico Mark 1 centre window lock gearbox systems only. Using them with other brands or gearbox types may result in poor fit, inadequate security, or operational failure. Always use genuine Nico replacement parts with Nico gearbox systems to ensure compatibility and maintain warranty coverage.

Q: Do I need to buy both the top and bottom extensions, or are they sold individually?
A: These shootbolt extensions are sold as a pair, which means you receive both the top and bottom extensions needed for one complete window lock system. This ensures balanced operation and security on both sides of your window opening sash.

Why Choose Nico Mark 1 Shootbolt Extensions?

When your window lock system needs attention, choosing genuine Nico replacement parts ensures you're investing in the same quality and precision engineering that went into your original installation. These shootbolt extensions aren't generic aftermarket alternatives – they're authentic OEM components manufactured to exact specifications, guaranteeing seamless compatibility with your Nico Mark 1 gearbox system. With comprehensive size coverage from 290mm to 1360mm and an intelligent cut-to-length design, you can restore your window's security and smooth operation without the expense of complete lock replacement. The innovative break-away lug system demonstrates Nico's attention to practical installation needs, making professional-quality results achievable for DIY enthusiasts. Choose genuine Nico components and experience the confidence that comes from using parts designed specifically for your window system.