block and tackle balance and accessories

Hi there, Mike.

Thank you for reaching out to us. It appears your balance's shoe is the 15-197 which means this will have to be a custom order. However, your 30HD stamp is calibrated for a sash weighing 23 to 29 pounds. Have you ever had any issues with operating this window? Custom orders are nonrefundable so you could always re-weigh the sash to be safe. If it is indeed 22.6 pounds, you may want to go with the 30R stamp. A pair of balances with this stamp will support a sash weighing 15 to 23 pounds. Let me know which stamp you'd like to go with and the quantity you'd like to purchase and I can draft a price quote.

The portion you're referring to on the 26-150 isn't a screw hole, no. It's just the way the pivots are designed. 

The 26-150 is the closest part we can offer, unfortunately. However, we do find that it works fine with one screw, we use it all the time.