Sewing Machine Needle Plate 52033LGB Throat Plate Line Gauge (52033LGB) Description: For general Work, black finishsmall needle hole 5Z031149031. Part No. 52033LGB Singer Throat Plates & Feed Dogs -Industrial Machines - Model(s): For single needle drop feed lockstitch machines (classes: 31, 44, 95, 96, 191D, 195K, 196K, 241, 245, 251, 281, 331K, 336K, 400W, 451K, 491, 591D, 600W, 660A, 770, 771, 1300 & Centurion 121D) - Small needle hole plate for regular work; line gauge black finish.