3/8"-16 x 1-1/4" Zinc Finish Case Hardened Hex Serrated Flange Bolt / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 1.210 INCHES MINIMUM AND 1.270 INCHES MAXIMUM FASTENER LENGTH: 1.210 INCHES MINIMUM AND 1.270 INCHES MAXIMUM HEAD STYLE: C116 CHAMFER SERRATED FLANGE HEAD HEIGHT: 0.307 INCHES MINIMUM AND 0.331 INCHES MAXIMUM WIDTH BETWEEN FLATS: 0.552 INCHES MINIMUM AND 0.562 INCHES MAXIMUM EXTENDED WASHER DIAMETER: 0.771 INCHES MINIMUM AND 0.793 INCHES MAXIMUM END ITEM IDENTIFICATION: MRV; MRAP MAXXPRO DASH ISS W/OGPK AND W/CROWS NOMINAL THREAD DIAMETER: 0.375 INCHES FEATURES PROVIDED: CASEHARDENED THREAD QUANTITY PER INCH: 16 MINIMUM TENSILE STRENGTH: 120000 POUNDS PER SQUARE INCH PART NAME ASSIGNED BY CONTROLLING AGENCY: BOLT,HEX FLANGD 3/8-16 X 1-1/4 SPECIAL FEATURES: TYPICAL CASE HARDNESS IS RATED ROCKWELL C 40 MINIMUM; CASE DEPTH 0.005 INCH TO 0.011 INCH; TYPICAL CORE HARDNESS IS RATED ROCKWELL C 25 TO 34. MATERIAL: STEEL OVERALL PROPRIETARY CHARACTERISTICS: NPAC SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM F1941, FE/ZN 3A ASSN STD SINGLE TREATMENT RESPONSE OVERALL THREAD SERIES DESIGNATOR: UNC