BB1199 Full Mortise Commercial Hinge Features: Furnished with fastener hole locations that conform to standards approved by ANSI A156.7 Four ball bearings. Non-rising removable pin with tip and plug. Specifications: Certifications: ANSI A2111 (Brass), ANSI A5111 (Stainless Steel) Electric Modifications: EMN (Electric Monitor Only), ETW (Electric Through-Wire Only), ETM (Electric Through-Wire with Monitoring), Quick Connect Fastener Size - Machine: 1/2' x 12-24' Fastener Size - Wood: 1 1/4' x 12' Fire Rating: Stainless steel model complies with NFPA80 requirements for use on fire rated door assemblies Knuckles: 5 Material: Brass with Stainless Steel Pin, Stainless Steel with Stainless Steel Pin Finishe: US32D - Satin Stainless Steel