28 Series NCM Front nose mount / Spring return NCMB_-_S Double end mount / Spring return NCME_-_S Rear pivot mount / Spring return NCMC_-_S Bore size (inch) 075 (3/4") 088 (7/8") 106 (1-1/16") 125 (1-1/4") 150 (1-1/2") E 0.86 0.93 1.12 1.32 1.56 F 0.38 0.38 0.38 0.50 0.62 G 0.251 0.251 0.251 0.251 . GA 0.250 0.250 0.250 0.250 0.375 GB 0.75 0.75 0.75 0.75 1.00 K 0.25 0.25 0.25 0.25 0.38 L 0.34 0.34 0.34 0.41 0.50 NC 0.62 0.75 0.88 1.06 1.25 NE 0.12 0.18 0.24 0.25 0.25 NN 1/2-20 5/8-18 5/8-18 3/4-16 3/4-16 W 0.69 0.75 0.75 0.88 1.00 YC 0.62 0.62 0.62 0.78 0.91 ZC 1.69 1.56 1.56 1.81 1.69 DA 0.25 0.25 0.38 0.44 0.44 A 0.50 0.50 0.50 0.88 0.88 B 0.496 0.624 0.624 0.749 0.749 KK 1/4-28 1/4-28 5/16-24 7/16-20 7/16-20 0 .0.003 0 .0.003 0 .0.003 0 .0.003 0 .0.003 BC 0.624 0.624 0.624 0.749 0.749 0 .0.003 0 .0.003 0 .0.003 0 .0.003 0 .0.003 Bore size (inch) 075 (3/4") 088 (7/8") 106 (1-1/16") 125 (1-1/4") 150 (1-1/2") No bumper 2.53 . 2.78 . 3.25 With bumper . 2.72 . 3.38 . Note) LB dimension for NCME150 not applicable. Note 1) F dimension for NCME150 not applicable. There are no flats on the E type 150 bore rear tang. Note 2) FF dimension for NCMC 150 is not applicable. There are no threads on the C type 150 bore rear tang. LB No bumper 1.75 . 2.19 . 2.56 With bumper . 2.09 . 2.66 . ZB1 No bumper 2.80 . 3.06 . 3.25 With bumper . 3.00 . 3.77 . ZB2 Bore size (inch) 075 (3/4") 088 (7/8") 106 (1-1/16") 125 (1-1/4") 150 (1-1/2") No bumper 2.66 . 2.92 . 3.38 With bumper . 2.85 . 3.50 . LB No bumper 1.88 . 2.31 . 2.69 With bumper . 2.22 . 2.78 . ZB1 No bumper 2.92 . 3.19 . 3.38 With bumper . 3.13 . 3.91 . ZB2 Bore size (inch) 075 (3/4") 088 (7/8") 106 (1-1/16") 125 (1-1/4") 150 (1-1/2") oG 0.251 0.251 0.251 0.251 0.378 Bore size (inch) 075 (3/4") 088 (7/8") 106 (1-1/16") 125 (1-1/4") 150 (1-1/2") No bumper 2.66 . 2.92 . . With bumper . 2.85 . 3.50 . LB No bumper 2.93 . 3.19 . 3.38 With bumper . 3.13 . 3.91 . ZB2 DA K KK-UNF-2A A 0.09 NC oE NN Mounting Nut (included) oB Pilot W 1/8 NPT ZB1 + ZC per 1" of Stroke NE LB + ZC per 1" of Stroke DA KK-UNF-2A K A NN-UNF-2A oE oGA PIN 1/8 NPT YC L F FF-UNF-2A GB 0.09 oB Pilot W ZB2 + ZC per 1" of Stroke oB Pilot LB + ZC per 1" of Stroke DA KK-UNF-2A K A 1/8 NPT oB Pilot YC oE L F oG PIVOT PIN HOLE 0.09 FF MOUNTING NUT (included) NN MOUNTING NUT (included) 0.09 W ZB2 + ZC per 1" of Stroke FF 5/8-18 5/8-18 5/8-18 3/4-16 3/4-16 (inch) Single Acting, Spring Return (B/C/E) Mount without Magnet X155US (without clevis pin) Single Acting, Spring Return (B/C) Mount with Magnet Single Acting, Spring Return (E) Mount with Magnet Dimensions: Single Acting, Spring Return Non-rotating Rod