Product Description
Building under construction and need every sub to get through the doors with one master? The Hager 3981-BLU is a construction SFIC core. Drop it into your SFIC housings during the build phase. When the building gets its CO, your locksmith pulls the construction cores with a control key and swaps in permanent combinated cores — instant security upgrade, no door disassembly.
No keys included. Construction cores are temporary-use and do not ship with keys.
Pro-Tip from Our Locksmiths: Construction cores are temporary — they go in during the build phase so every sub can get through the doors with a single master. When the building gets its certificate of occupancy, the GC pulls the construction cores with a control key and your locksmith drops in the permanent combinated cores. Make sure you order enough permanent cores and a control key for the swap. Call (877) 365-5625 if you need help planning a construction-to-permanent core package.
| Brand | Hager |
| Part Number | 3981-BLU |
| Type | SFIC Core — Small Format Interchangeable Core (Construction) |
| Pin Configuration | 6-Pin — residential/light commercial |
| Keyway | A - Best — SFIC format, cross-compatible with all standard SFIC housings |
| Core Format | Small Format IC (SFIC) — figure-8 profile, .450" diameter |
| Compatibility | Any standard SFIC housing — mortise, rim, knob/lever, padlock, cabinet |
| Grade | Meets ANSI/BHMA A156.5 standards for IC cylinders |
| Material | Brass plug and shell, nickel silver pins |
| Handing | Non-handed — works in any orientation |
| Warranty | Hager limited manufacturer warranty — covers defects in materials and workmanship |
- Drops into any standard SFIC housing — mortise cylinders, rim cylinders, knob/lever locks, padlocks, and cabinet locks
- Control key swaps the core in seconds without removing the lock from the door — rekey an entire building in a fraction of the time
- Figure-8 profile with .450" diameter — industry standard across all SFIC manufacturers
- Ships uncombinated — your locksmith pins it to your building's master key system for maximum security control
- Hager commercial grade — built for daily use in schools, hospitals, offices, and government buildings
Works With: Any standard SFIC housing from any manufacturer — Arrow, BEST, Falcon, Schlage, KSP, Kaba Ilco, Sargent, and Hager. Fits mortise cylinders, rim cylinders, knob/lever locks, padlocks, and cabinet locks with SFIC prep. If you're replacing an existing core, match the pin count (6-Pin) and keyway letter to your current system. Need help? (877) 365-5625.
Free Expert Support — As an authorized Hager distributor, Lock Depot provides full manufacturer warranty coverage and same day shipping on most orders. Call (877) 365-5625 for personalized help.
Image shown is representative of the product line. Actual finish, trim, and configuration may vary by SKU.
