Kaba Ilco Schlage 1145 5 Pin SC1 Keyway Key Blank, 50CT

The Ilco 1145 is cut for the Schlage "C" keyway (SC1), 5-pin, so it duplicates keys for Schlage cylinders on the C keyway. If the original key is stamped SC1 or the cylinder is a standard 5-pin Schlage C, this is the blank. A 6-pin Schlage C key (SC4) is a different blank.

For Corbin Russwin cylinders, use a Corbin Russwin blank rather than the SC1. The Corbin Russwin 27 is a single-section standard bow blank in nickel silver, and the 027-6PIN-10 is a 6-pin blank in the 027 master section for openings keyed in that section. The Ilco 1145 covers the Schlage "C" 5-pin side of the same key cabinet. A facility running both cylinder makes stocks both families, keyed and cut separately.

No. The Ilco 1145 blank is a Schlage "C" keyway, 5-pin blank in brass, and it is the blank to cut for an SC1 cylinder. The Corbin Russwin 027-6PIN-10 is a 6-pin blank in the 027 master section, which is a Corbin Russwin keyway family - the blade milling will not enter an SC1 plug regardless of how it is cut. Keyway section and pin count both have to match the cylinder, so the two are not interchangeable even though both are key blanks.

If the building runs Schlage 5-pin C keyway cylinders, yes. Buying blanks 50 at a time in one keyway is how you keep a single duplication stock across a fleet of doors, so any unit key can be cut on demand rather than ordered per door.

Pin count follows the cylinder, not the system design. The Ilco 1145 is a 5-pin blank cut for Schlage "C" 5-pin cylinders; a 6-pin blank such as the Corbin Russwin 027-6PIN-10 is bitted across six positions and belongs in a 6-pin Corbin Russwin plug. Substituting one for the other does not add a pin to an existing cylinder - it simply will not operate it. Masterkeying is set in the cylinder pinning, so the blank you buy is dictated by the keyway and pin count already in the door.

Brass. Brass cuts cleanly on a duplicator and is the standard for high volume key duplication, which matters when you are running a hundred keys for a building rekey.

The Ilco 1145 blank is brass; the Corbin Russwin 27 blank is nickel silver with a coined logo bow. Both are standard key blank stock and both are cut on the same duplicating and code machines. The material affects the feel and wear behavior of the finished key, not which cylinder it fits - keyway section is what decides that, and brass SC1 is the Schlage "C" 5-pin choice.