本标准规定了直径为75毫米（2.95英寸），标称胶片容量为15米（50英尺）的8毫米S型电影放映卷轴的尺寸，通常用于从加工实验室归还胶片。卷盘适合卷盘到卷盘的设备，在投影盒式磁带中可互换。

This standard specifies the dimensions of 8-mm type S motion-picture projection reels of 75-mm (2.95-in) diameter with a nominal film capacity of 15 m (50 ft) generally used for returning the film from the processing laboratory. The reels fit reel-to-reel equipment and are interchangeable in projection cassettes.