Yes. The tailpiece and screw lengths in the B202-509 pack cover doors from 1-3/8 inches through 1-3/4 inches, which spans the standard commercial 1-3/4 inch door and the lighter 1-3/8 inch interior door.

That's the intended application. The B202-558 tailpiece is specified for use with the Schlage B250PD conventional cylinder. If your deadbolt uses an interchangeable core or a different Schlage B-series cylinder, this isn't the tailpiece for it.

No. The Schlage B202-509 pack supplies the B202-558 tailpiece and two B250-086 screw packs that drive and secure a B250PD conventional cylinder in a door 1-3/8 inch to 1-3/4 inch thick. The GMS KIT-PART04 is a collars kit, a cylinder accessory that dresses the cylinder face rather than transmitting rotation to the deadbolt or fastening the cylinder through the door. If the tailpiece is short, bent, or missing after a cylinder swap, the B202-509 pack is the part that restores operation; a collar kit will not.

Yes, this is the right service pack. It carries two B250-086 screw packs along with the B202-558 tailpiece, so you get the mounting screws and the cylinder tailpiece together rather than sourcing them separately.

No. This is hardware only, a tailpiece and screws. The B250PD cylinder itself, the housing and the keys are separate. If you need a keyed core instead, look at conventional or small format IC cylinders, such as the GMS 6-pin or 7-pin small format IC cores, which ship un-combinated without keys, pins, springs or caps.

No. The B202-558 tailpiece is matched to the B250PD conventional cylinder in a bored deadbolt. Mortise cylinders drive a cam, not a tailpiece. For a mortise application you'd want a mortise housing such as the GMS Best SFIC straight mortise housing, 7-pin with a Yale cam.

For doors between 1-3/8 and 1-3/4 inches running Schlage B250PD cylinders, yes, the B202-509 pack covers that whole range in one part number. You'd only be choosing the finish per opening. Anything thicker than 1-3/4 inches falls outside what this pack covers.

That is a different path. The B202-509 pack is matched to the Schlage B250PD conventional cylinder and to doors 1-3/8 inch to 1-3/4 inch thick. For an SFIC program you would be working with cores such as the GMS 6-pin small format IC core or the 7-pin version, both supplied un-combinated without keys, pins, springs, or caps, and a housing such as the GMS Best SFIC straight mortise housing in 7-pin with a Yale cam. Those carry their own retention and cam arrangements, so the conventional B250PD tailpiece is not part of that build.

No, those are two different failures. The B202-509 pack contains the B202-558 tailpiece and two B250-086 screw packs, which connect and fasten a B250PD conventional cylinder. A latch that will not hold at the frame is a strike or latch issue: an ABH 1890 Series roller latch with full lip cast strike offers 5/16 inch adjustable projection, the ABH 1895 Series roller latch with T strike offers 1/2 inch adjustable projection, and a Cal-Royal ASA478 template ASA strike addresses standard commercial strike prep. Use the B202-509 pack only when the cylinder side of the lock is the problem.

Eight: 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. Match the finish code to the deadbolt already on the door so the exposed screw heads blend in.

The Schlage B202-509 tailpiece and screw pack is offered in eight finishes: 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, so the exposed screw heads and trim can be matched to the lock. Related accessories are specified differently: a Trimco 1268 anchor plate is called out by its 3-1/2 inch diameter, and a Codelocks CL4000 glass door strike box is specified by the CL4000 or CL4500 lock it serves rather than by a finish range.