Grommet, Metallic, Plain, With Toothed Washer (Type II)
金属平垫圈 带齿垫圈（II型）

2011-07-29

GROMMET, METALLIC, PLAIN, WITH TOOTHED WASHER (TYPE II) (S/S BY NASM16491/1-1999)
带齿垫圈的金属平垫圈（II型）

1999-09-30

GROMMETS, METALLIC, PLAIN AND SPUR, WITH WASHER, TYPE I AND TYPE III (SUPERSEDING MS20230C) (S/S BY NASM20230-1999)
带垫圈的金属平垫圈和正垫圈 I型和III型（取代MS20230C）

1991-10-09

GROMMETS, METALLIC, PLAIN AND SPUR, WITH WASHER, TYPE I AND TYPE III (SUPERSEDING MS20230C) (S/S BY NASM20230-1999)
带垫圈的金属平垫圈和正垫圈 I型和III型（取代MS20230C）

1999-10-27

GROMMETS, METALLIC, PLAIN AND SPUR, WITH WASHER, TYPE I AND TYPE III (SUPERSEDING MS20230C) (S/S BY NASM20230-1999)
I型和III型带垫圈的金属平垫圈和丁字垫圈（取代MS20230C）（由NASM20230-1999提供）

1969-03-28