5/8"-11 (USS) GRADE-8 (ALLOY) HEX NUTS, Zinc Yellow, (50-PACK)

• THREAD PITCH: 5/8"-11
• FOR USE WITH SAE J429 GRADE-8 FASTENERS
• PRECISION THREADS, UNC AND UNF CLASS 2B TO ANSI/ASMEB1.1
• COUNTERSUNK AND DOUBLE CHAMFERED
• MEDIUM CARBON STEEL
• ZINC YELLOW PLATING FOR CORROSION RESISTANCE, ASTM B633, TYPE II SC1 
• USS (UNC) = COARSE THREAD 
• SAE (UNF) = FINE THREAD 

TECHNICAL DATA 

• HARDNESS: 1/4"-5/8" NOMINAL DIAMETER, ROCKWELL C24-C32; 5/8"-1" NOMINAL DIAMETER, ROCKWELL C26-C36
• COMPLIES WITH SAE J995 GRADE-8 ANSI/ASMEB18.2.2 HEX NUTS 
• TEMPERING TEMPERATURE: 800°F (MINIMUM)
• DECARBURATION: SAE J121
• DISCONTINUIES: SAE J122A