本标准规定了盒式磁带中0.250英寸（6.35毫米）宽、26磁道的流式磁带的要求，该盒式磁带用于信息处理系统、通信系统和相关设备之间的信息交换，使用交换双方商定的信息交换标准代码。本标准仅适用于磁带记录。符合未记录磁带标准X3。251:199x，用于信息交换的未记录盒式磁带-0.250英寸（6.35毫米）20000 ftpi（787 ftpmm），是信息交换的要求。

This standard provides the requirements for a streaming 0.250 inch (6.35 mm) wide, 26-Track, magnetic tape in a cartridge to be used for information interchange between information processing systems, communication systems, and associated equipment utilizing a standard code for information interchange, as agreed upon by the interchange parties. This standard refers solely to recording on magnetic tape. Compliance with the standard for unrecorded tape, X3.251:199x, Unrecorded Magnetic Tape Cartridge for Information Interchange-0.250 in (6.35 mm) 20 000 ftpi (787 ftpmm), is a requirement for information interchange.