NASM 21262 Rev.2
Screws, Self Locking, 250 Degrees F, Cylindrical Head, Hexagonal Wrenching Socket, Alloy Steel, 160 Ksi Ftu, (Socket Head Cap Screws)
自锁螺钉 250华氏度 圆柱头 六角扳手套筒 合金钢 160 Ksi Ftu （内六角螺钉）
2016-07-29
MIL MS21262D
SCREWS, SELF LOCKING, 250 DEG. F, CYLINDRICAL HEAD HEXAGONAL WRENCHING SOCKET, ALLOY STEEL, 160 KSI FTU (SOCKET HEAD CAP SCREWS) (SUPERSEDING MS21262C)(S/S BY NASM21262-1998)
自锁螺钉 250华氏度 圆柱头六角扳手套筒 合金钢 160 KSI FTU（内六角螺钉）（取代MS21262C）（由NASM212622-1998提供）
1982-08-16
MIL MS21295A
SCREWS, SELF LOCKING, 250 DEG. F, CYLINDRICAL HEAD, HEXAGONAL WRENCHING SOCKET, CORROSION RESISTING STEEL, 80 KSI FTU (SOCKET HEAD CAP SCREWS) (SUPERSEDING MS21295)(S/S BY NASM21295-1999)
耐腐蚀钢制内六角扳手套筒圆柱头250华氏度自锁螺钉 80 KSI FTU（内六角螺钉）（取代MS21295）（由NASM21295-1999提供）
1963-02-20