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Measurements table for flat seats

Part number

Thread size

Seat

Overall length

Hex size

Picture

21120SU

1/2x20

flat

15/35mm

21mm

22140SU

1/2x20

flat

24/44.5mm

21mm

23181SU

1/2x20

flat

35/55mm

21mm

21121SU

1/2x20rh,lh

flat

15/35mm

21mm

20115SU

3/8

flat

10.8/35.1mm

17mm

21122SU

7/16“

flat

15/35mm

21mm

21123SU

7/16x20rh,lh

flat

15/35mm

21mm

22142SU

7/16“

flat

24/44.5mm

21mm

23180SU

7/16“

flat

35/55mm

21mm

22144SU

9/16“

flat

25.4/61.5mm

22mm

21153SU

M12x1.25

flat

15/35mm

21mm

23186SU

M12x1.25

flat

35/55mm

21mm

20116SU

M12x1.5

flat

42.2mm

19mm

21156SU

M12x1.5

flat

15/35mm

21mm

22158SU

M12x1.5

flat

24/44.5mm

21mm

23185SU

M12x1.5

flat

35/55mm

21mm

21158SU

M14x1.5

flat

40.8mm

22mm

21157SU

M14x1.5

flat

19,4/42mm

22mm