1/4" Dia .251-.375" Grip Range AB8-6 Aluminum Rivet/Steel Mandrel / FASTENER LENGTH: 0.572 INCHES NOMINAL HEAD STYLE: C19 OVAL/TRUSS HEAD HEIGHT: 0.069 INCHES NOMINAL SHANK DIAMETER: 0.250 INCHES NOMINAL SHANK STYLE: D19 PULL THROUGH HOLLOW SHANK HEAD MAJOR DIAMETER: 0.500 INCHES NOMINAL EXPANSION DEVICE: PLAIN STEM-TYPE T GRIP LENGTH: 0.251 INCHES MINIMUM AND 0.375 INCHES MAXIMUM MATERIAL: ALUMINUM ALLOY 5056 SLEEVE MATERIAL: ALUMINUM ALLOY 5056 STEM MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B316 ASSN STD 1ST MATERIAL RESPONSE SLEEVE MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B316 ASSN STD 1ST MATERIAL RESPONSE STEM SURFACE TREATMENT: ANODIZE SLEEVE SURFACE TREATMENT: CADMIUM STEM