| ITEM | NAME/DESCRIPTION | PART NO. | BRAND |
| 1980 | Parker ET50C4178 ET50C4178 Parker Et50C4178 Cylinder Body | ET50C4178 | Parker |
| 1981 | Parker ET50C4375 ET50C4375 Parker Et50C4375 Cylinder Body | ET50C4375 | Parker |
| 1982 | Parker ET50C4402P ET50C4402P Parker Et50C4402P Cylinder Body, Linear Pot | ET50C4402P | Parker |
| 1983 | Parker ET50C5162 ET50C5162 Parker Et50C5162 Cylinder Body | ET50C5162 | Parker |
| 1984 | Parker ET50-COVER-A528 ET50-COVER-A528 Parker Et50-Cover-A528 Ss Cover For Etb50-…-A528 | ET50-COVER-A528 | Parker |
| 1985 | Parker ET50E01 ET50E01 Parker Et50E01 End Cap | ET50E01 | Parker |
| 1986 | Parker ET50E01BLK ET50E01BLK Parker Et50E01Blk End Cap – No Anodize | ET50E01BLK | Parker |
| 1987 | Parker ET50E01-BPC ET50E01-BPC Parker Et50E01-Bpc Black Powder Coat | ET50E01-BPC | Parker |
| 1988 | Parker ET50E01-L615 ET50E01-L615 Parker Et50E01-L615 End Cap | ET50E01-L615 | Parker |
| 1989 | Parker ET50E01-SP1 ET50E01-SP1 Parker Et50E01-Sp1 End Cap With Teflon Seal | ET50E01-SP1 | Parker |
| 1990 | Parker ET50E01-SP2 ET50E01-SP2 Parker Et50E01-Sp2 End Cap Top & Bot Tapped Holes | ET50E01-SP2 | Parker |
| 1991 | Parker ET50E01-SP3 ET50E01-SP3 Parker Et50E01-Sp3 Tapped Holes Four Sides | ET50E01-SP3 | Parker |
| 1992 | Parker ET50E01T ET50E01T Parker Et50E01T End Cap With Trunnion Mounting | ET50E01T | Parker |
| 1993 | Parker ET50E02 ET50E02 Parker Et50E02 End Cap | ET50E02 | Parker |
| 1994 | Parker ET50E02BLK ET50E02BLK Parker Et50E02Blk End Cap – No Anodize | ET50E02BLK | Parker |
| 1995 | Parker ET50E02-BPC ET50E02-BPC Parker Et50E02-Bpc Black Powder Coat | ET50E02-BPC | Parker |
| 1996 | Parker ET50E02DT ET50E02DT Parker Et50E02Dt End Cap | ET50E02DT | Parker |
| 1997 | Parker ET50E02-L615 ET50E02-L615 Parker Et50E02-L615 End Cap | ET50E02-L615 | Parker |
| 1998 | Parker ET50E02-SP2 ET50E02-SP2 Parker Et50E02-Sp2 End Cap Top & Bot Tapped Holes | ET50E02-SP2 | Parker |
| 1999 | Parker ET50E02T ET50E02T Parker Et50E02T Inter Cap W/Trunion | ET50E02T | Parker |
| 2000 | Parker ET50E02T-L615 ET50E02T-L615 Parker Et50E02T-L615 Inter Cap W/Trunion | ET50E02T-L615 | Parker |
| 2001 | Parker ET50E03 ET50E03 Parker Et50E03 Trunion Mount | ET50E03 | Parker |
| 2002 | Parker ET50E03-SP1 ET50E03-SP1 Parker Et50E03-Sp1 Trunion Mount End Cap | ET50E03-SP1 | Parker |
| 2003 | Parker ET50E04 ET50E04 Parker Et50E04 Adapter Flange | ET50E04 | Parker |
| 2004 | Parker ET50E04-EMRD-GTN070 ET50E04-EMRD-GTN070 Parker Et50E04-Emrd-Gtn070 Adapter Flange | ET50E04-EMRD-GTN070 | Parker |
| 2005 | Parker ET50E04-EMRD-PTN060 ET50E04-EMRD-PTN060 Parker Et50E04-Emrd-Ptn060 Adapter Flange | ET50E04-EMRD-PTN060 | Parker |
| 2006 | Parker ET50E04-L615 ET50E04-L615 Parker Et50E04-L615 Adapter Flange | ET50E04-L615 | Parker |
| 2007 | Parker ET50E04-SP1 ET50E04-SP1 Parker Et50E04-Sp1 Adapter Flange | ET50E04-SP1 | Parker |
| 2008 | Parker ET50E04-SP10 ET50E04-SP10 Parker Et50E04-Sp10 Motor Adapter Flange | ET50E04-SP10 | Parker |
| 2009 | Parker ET50E04-SP11 ET50E04-SP11 Parker Et50E04-Sp11 Adapter Flange | ET50E04-SP11 | Parker |
| 2010 | Parker ET50E04-SP12 ET50E04-SP12 Parker Et50E04-Sp12 For Qci-23H | ET50E04-SP12 | Parker |
| 2011 | Parker ET50E04-SP13 ET50E04-SP13 Parker Et50E04-Sp13 Adapter Flange -Mkd025 | ET50E04-SP13 | Parker |
| 2012 | Parker ET50E04-SP14 ET50E04-SP14 Parker Et50E04-Sp14 Adapter Flange -Mkd025 | ET50E04-SP14 | Parker |
| 2013 | Parker ET50E04-SP15 ET50E04-SP15 Parker Et50E04-Sp15 Adapter Flange | ET50E04-SP15 | Parker |
| 2014 | Parker ET50E04-SP17 ET50E04-SP17 Parker Et50E04-Sp17 Adapter Flange | ET50E04-SP17 | Parker |
| 2015 | Parker ET50E04-SP2 ET50E04-SP2 Parker Et50E04-Sp2 Adapter Flange -Mkd025 | ET50E04-SP2 | Parker |
| 2016 | Parker ET50E04-SP25 ET50E04-SP25 Parker Et50E04-Sp25 For Leeson 110458 Motor | ET50E04-SP25 | Parker |
| 2017 | Parker ET50E04-SP3 ET50E04-SP3 Parker Et50E04-Sp3 Adapter Flange | ET50E04-SP3 | Parker |
| 2018 | Parker ET50E04-SP4 ET50E04-SP4 Parker Et50E04-Sp4 Adapter Flange | ET50E04-SP4 | Parker |
| 2019 | Parker ET50E04-SP5 ET50E04-SP5 Parker Et50E04-Sp5 Coupler Housing Et50 To Et80 | ET50E04-SP5 | Parker |
| 2020 | Parker ET50E04-SP6 ET50E04-SP6 Parker Et50E04-Sp6 Adapter Flange | ET50E04-SP6 | Parker |
| 2021 | Parker ET50E04-SP7 ET50E04-SP7 Parker Et50E04-Sp7 Adapter Flange | ET50E04-SP7 | Parker |
| 2022 | Parker ET50E04-SP8 ET50E04-SP8 Parker Et50E04-Sp8 Adapter Flange | ET50E04-SP8 | Parker |
| 2023 | Parker ET50E04-SP9 ET50E04-SP9 Parker Et50E04-Sp9 Adapter Flange | ET50E04-SP9 | Parker |

