Schlage Commercial 36-079 Blocking Ring, for use without Compression Ring, 3/8"

The Schlage Commercial 3/8 inch blocking ring is specified for the B250 and B500 Series. Both are B-Series deadbolt lines, so if the lock you are servicing sits in either family, this is the correct ring. It is a commercial part rather than a residential-grade one, which matters if you are matching hardware already installed on a commercial opening.

That is exactly what a blocking ring does. It is a spacer that sits between the cylinder and the door face to take up the extra length when the cylinder runs long for the door, so the lock draws up tight instead of standing proud. This one is a 3/8 inch ring for the B250 and B500 Series. Blocking rings come in more than one thickness, so measure the gap you are closing before you settle on 3/8.

Eight BHMA finishes are offered: 605 bright brass, 606 satin brass, 609 antique brass, 612 satin bronze, 613 oil rubbed bronze, 622 matte black, 625 bright chrome, and 626 satin chrome. The ring is visible at the door face right at the cylinder, so order it in the same BHMA number as the deadbolt it is going under. On a mixed building that means ordering per opening rather than one finish for the whole job. 626 satin chrome is the finish most commercial openings are specified in, so check that first if the number was never recorded.

On its own. The 3/8 inch blocking ring is a replacement part, so a locksmith or maintenance tech servicing an existing B250 or B500 Series lock can order just the ring instead of replacing the whole deadbolt. Match the finish to the lock already on the door when you order.

No. The 3/8 inch blocking ring is specified for the B250 and B500 Series deadbolts only. Cylindrical locksets in the ND and AL lines take their own trim and spacing parts, so pull the ring called out for that specific series instead of adapting this one.