#12-40 Ribbed Channel Balance for Wood Windows, #02 End Bracket

1/2" Ribbed Channel Balance for Wood Windows with Vinyl Jambliners, #02 End Bracket, Stamped #12-40

This ribbed channel balance is designed specifically for use in wood double hung windows with vinyl jamb liners. It is a key replacement part that helps restore smooth and reliable sash movement in older wood windows that use this balance style. The balance features a #02 end bracket and is stamped with #12-40, which identifies its length and strength. Note that this component is for wood windows fitted with vinyl jambliners and is not compatible with all-vinyl windows.

The channel itself is mill-finished aluminum, providing good durability and resistance to corrosion. No other color options or painted finishes are available for this part. Industry trade sizes for this balance are sometimes called "1/2 inch", but the actual width is typically 9/16” (14.3mm), and the depth measures 5/8” (15.9mm). Lengths are standardized by the stamp, with the physical metal channel typically measuring 1” (25.4mm) longer than the number on the balance. For this model, ensure you check the length, markings, and weight code when ordering for the best fit.

Important: Please verify the exact numbers and letters stamped onto your existing channel balance and confirm the attached end bracket style matches. Weight codes (such as R, HD, or XH) relate to sash weight; 'R' stands for standard weight, while 'TG' is equivalent to extra heavy (XH). Accurate identification helps guarantee correct replacement and window performance.

Technical Information

• Channel Balance Width: 9/16" (14.3mm)
• Channel Balance Depth: 5/8" (15.9mm)
• Compatible Sash Types: Wood double hung windows with vinyl jamb liners
• Finish: Mill aluminum
• End Bracket: #02 style (attached)
• Stamped Number: 12-40

Notes

• Used on wood windows with vinyl jamb liners, not on all-vinyl windows.
• Available lengths range from 10" to 52" (25.4cm to 132.1cm).
• Industry may refer to these as "1/2 inch" balances, but actual width is typically 9/16" (14.3mm).
• To determine correct length, measure only the metal portion; should be 1" (25.4mm) more than the balance stamp.
• If no weight code letter is stamped, it is considered "R" (regular/standard weight).
• 'TG' code denotes the same weight as 'XH' (extra heavy).

Sold individually. Please compare all aspects of your existing balance—including stamped numbers, bracket style, and measurements—before ordering. Measuring your existing hardware carefully ensures the correct fit and reduces the risk of returns.