Weld-on Ports & Fittings
We machine round, square, and hex steel weld on ports and fittings for hydraulic system plumbing from C1018 or 8620 bar for best in class weldability. For off highway equipment plumbing with flows from 10 to 70 GPM with working pressures to 6,000 PSI we recommend using 1/2” to 1” Seamless Schedule 80 pipe.
Hydraulic cylinder porting components include:
- Round female SAE O-Ring with straight through port
- Square female SAE O-Ring with straight through port
- Square female SAE O-Ring port 90° to barrel with passage parallel to barrel
- Square female SAE O-Ring port parallel to barrel with passage 90° to barrel
- Male JIC with straight through port
- Male Flat Face O-Ring with straight through port
- Round BSPP with straight through port
- Rectangular 4 bolt flange with straight through port
- Rectangular 4 bolt flange with passage parallel to barrel
- U-Flow rectangular port
End of tube ports include:
- Male JIC to ID of schedule 80 pipe with wrench hex
- Male Flat Face O-Ring to ID of schedule 80 pipe with wrench hex
- Female SAE O-Ring straight to OD of pipe, round OD
- Female SAE O-Ring with 90° passage for pipe OD
- U-Flow rectangular port
Weld procedures
To insure a good weld quality grind clean the weld joint area. For pipes or tubes a weld chamfer may need prepared. Check for fit and limit gaps to reduce distortion and slag contamination. Tack the parts in place and preheat to 100°F / 38°C minimum to 200°F / 93°C. Weld with an E70 or E80 filler material. Small multi-pass welds will reduce distortion on cylinder barrel welds. Clean slag and spatter from both sides of the weld area and wash before putting into service. If you have a weld leak it may require using 6010 or 6011 stick welding to seal off the oil.
Weld on Fittings
Male JIC with Straight Through Port
| Part No. | Style | A | B | C - Dia. | D - thread | E - Dia. | F |
|---|---|---|---|---|---|---|---|
| DPWJ06 | #6 JIC | 1.2" | 1.08" | 0.42" | 9/16 - 18 | 0.30" | 3/4" |
| DPWJ08 | #8 JIC | 1.41" | 1.30" | 0.54" | 3/4 - 16 | 0.39" | 7/8" |
| DPWJ10 | #10 JIC | 1.50" | 1.45" | 0.54" | 7/8 - 14 | 0.47" | 1" |
| DPWJ12 | #12 JIC | 1.81" | 1.69" | 0.74" | 1-1/16 - 12 | 0.59" | 1-1/4" |
| DPWJ16 | #16 JIC | 2.03" | 1.78" | 0.91" | 1-5/16 - 12 | 0.83" | 1-1/2" |
| DPWJ20 | #20 JIC | 2.09" | 1.84" | 1.28" | 1-5/8 - 12 | 1.09" | 1-7/8 |
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Weld on Threaded O-Ring Ports
Round Female SAE O-Ring with Straight Through Port
| Part No. | Description | A - Dia. | B | C - Dia. | D - Thread |
|---|---|---|---|---|---|
| DPWT04 | #4 SAE | 3/4" | 0.6" | 0.391 | 7/16 - 20 |
| DPWT06 | #6 SAE | 1" | 0.7" | 0.516 | 9/16 - 18 |
| DPWT08 | #8 SAE | 1-/4" | 0.85" | 0.688 | 3/4 - 16 |
| DPWT10 | #10 SAE | 1-3/8" | 0.75" | 0.8 | 7/8 - 14 |
| DPWT12 | #12 SAE | 1-5/8" | 1.05" | 0.974 | 1-1/16 - 12 |
| DPWT16 | #16 SAE | 1-15/16" | 1.125" | 1.224 | 1-5/16 - 12 |
| DPWT20 | #20 SAE | 2-3/8" | 1.125" | 1.538 | 1-5/8 - 12 |
| DPWT24 | #24 SAE | 2-5/8" | 1.125" | 1.788 | 1-7/8 - 12 |
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Round BSPP with Straight Through Port
| Part No. | Description |
|---|---|
| DPWT37 | #4 "G" Style 1/4" BSPP Type O-Ring Port |
| DPWT38 | #6 "G" Style 3/8" BSPP Type O-Ring Port |
| DPWT39 | #8 "G" Style 1/2" BSPP Type O-Ring Port |
| DPWT40 | #12 "G" Style 3/4" BSPP Type O-Ring Port |
| DPWT41 | #16 "G" Style 1" BSPP Type O-Ring Port |
| DPWT42 | #20 "G" Style 1-1/4" BSPP Type O-Ring Port |
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| Part No. | Description |
|---|---|
| DPWT43 | #20 "G" Style BSPP for Seal Washers |
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Straight Weld on Port Blocks
Square Female SAE O-Ring with Straight Through Port
| Part No. | Description | A | B | C - Dia. | D - Thread |
|---|---|---|---|---|---|
| DPWS04 | #4 SAE | 2" | 2.305" | 5-3/4" | 7/16 - 20 |
| DPWS06 | #6 SAE | 1" | 1.104" | 3" | 9/16 - 18 |
| DPWS08 | #8 SAE | 1-1/4" | 1.375" | 3-1/2" | 3/4 - 16 |
| DPWS10 | #10 SAE | 1-3/4" | 1.090" | 4-1/2" | 7/8 - 14 |
| DPWS12 | #12 SAE | 1-3/4" | 2.011" | 5-3/4" | 1-1/16 - 12 |
| DPWS16 | #16 SAE | 2" | 2.305" | 5-3/4" | 1-5/16 - 12 |
| DPWS20 | #20 SAE | 2-1/2" | 2.411" | 5-3/4" | 1-5/8 - 12 |
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Square Female SAE O-Ring with Straight Through Port with Butt Port Fit
| Part No. | Description | A | B | D - Thread |
|---|---|---|---|---|
| DPWS24 | #4 SAE | 7/8" | 1-1/2" | 7/16 - 20 |
| DPWS26 | #6 SAE | 2" | 3" | 9/16 - 18 |
| DPWS28 | #8 SAE | 2" | 3" | 3/4 - 16 |
| DPWS30 | #10 SAE | 2" | 3" | 7/8 - 14 |
| DPWS32 | #12 SAE | 2" | 3" | 1-1/16 - 12 |
| DPWS36 | #16 SAE | 2" | 3" | 1-5/16 - 12 |
| DPWS40 | #20 SAE | 2-1/2" | 3" | 1-5/8 - 12 |
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90° Weld On O-Ring Ports
Square Female SAE O-Ring Port 90° to Barrel with Passage Parallel to Barrel
(A and B are equal)
| Part No. | Description | A | C | D | E | F | G - Thread |
|---|---|---|---|---|---|---|---|
| DPW904 | #4 SAE | 2" | 3" | 3/4" | 1" | 1" | 7/16 - 20 |
| DPW906 | #6 SAE | 1" | 1-1/2" | 3/8" | 1/2" | .58" | 9/16 - 18 |
| DPW908 | #8 SAE | 1-1/4" | 2" | .54" | 5/8" | .81" | 3/4 - 16 |
| DPW910 | #10 SAE | 1-3/4" | 3" | 3/4" | 7/8" | 1" | 7/8 - 14 |
| DPW912 | #12 SAE | 1-3/4" | 2" | 3/4" | 7/8" | 1" | 1-1/16 - 12 |
| DPW916 | #16 SAE | 2" | 3" | 7/8" | 1" | 1.2" | 1-5/16 - 12 |
| DPW920 | #20 SAE | 2-1/2" | 3" | 3/4" | 1-1/4" | 1" | 1-5/8 - 12 |
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Square Female SAE O-Ring Port 90° to Barrel with Passage Parallel to Barrel - Flat to Top of Barellel
(A and B are equal)
| Part No. | Description | A | C | D | E | F | G - Thread |
|---|---|---|---|---|---|---|---|
| DPW924 | #4 SAE | 2" | 3" | 3/4" | 1" | 1" | 7/16 - 20 |
| DPW926 | #6 SAE | 2" | 3" | 3/4" | 1" | 1" | 9/16 - 18 |
| DPW928 | #8 SAE | 2" | 3" | 3/4" | 1" | 1" | 3/4 - 16 |
| DPW930 | #10 SAE | 2" | 3" | 3/4" | 1" | 1" | 7/8 - 14 |
| DPW933 | #12 SAE | 2" | 3" | 3/4" | 1" | 1" | 1-1/16 - 12 |
| DPW936 | #16 SAE | 2" | 3" | 3/4" | 1" | 1" | 1-5/16 - 12 |
| DPW940 | #20 SAE | 2-1/2" | 3" | 3/4" | 1-1/4" | 1" | 1-5/8 - 12 |
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90° Weld On Tube Port Offset Flat Top
(A and B are equal)
| Part No. | Description | A | C | D | E | F | G - Thread |
|---|---|---|---|---|---|---|---|
| DPW932 | #12 SAE | 2" | 2-3/4" | 3/4" | 3/4" | 1.1" | 1-1/16 - 12 |
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Square female SAE O-Ring port parallel to barrel with passage 90° to barrel
(A and B are equal)
| Part No. | Descrip. | A | C | D | E | F | H - Thread |
|---|---|---|---|---|---|---|---|
| DPW946 | #6 SAE | 1" | 1-1/2" | 1/2" | 1/2" | .65" | 9/16 - 18 |
| DPW941 | #8 SAE | 1-1/4" | 1-7/8" | 5/8" | 5/8" | .85" | 3/4 - 16 |
| DPW942 | #10 SAE | 1-1/4" | 1-7/8" | 5/8" | 5/8" | 3/4" | 7/8 - 14 |
| DPW952 | #12 SAE | 1-3/4" | 2" | 7/8" | 3/4" | 1-1/8" | 1-1/16 - 12 |
| DPW956 | #16 SAE | 2" | 2-1/4" | 1" | .85" | 1-1/4" | 1-5/16 - 12 |
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Female O-Ring to Tube & Pipe Thread Weld on Ports
| Part No. | Description |
|---|---|
| DPWP08 | 1/2" NPT Female |
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Female SAE O-Ring straight to OD of pipe, Round 
| Part No. | Descrip. | Tube OD | A - Dia. | B | C - Dia. | D | E - Thread |
|---|---|---|---|---|---|---|---|
| DPWP14 | #8 SAE | 3/4" | 1-3/8" | 1-1/4" | 3/4" | 1/2" | 3/4 - 16 |
| DPWP21 | #12 SAE | 7/8" | 1-5/8" | 1-1/2" | 7/8" | 5/8" | 1-1/16 - 12 |
| DPWP22 | #12 SAE | 1" | 1-5/8" | 1-1/2" | 1" | 5/8" | 1-1/16 - 12 |
| DPWP23 | #12 SAE | 3/4" | 1-5/8" | 1.532" | 3/4" | 5/8" | 1-1/16 - 12 |
| DPWP31 | #16 SAE | 1.385" | 2" | 1-3/4" | 1.385" | 3/4" | 1-5/16 - 12 |
| DPWP32 | #16 SAE | 1-1/16" | 2" | 1.907" | 1-1/16" | 3/4" | 1-5/16 - 12 |
| DPWP33 | #16 SAE | 1-1/4" | 2" | 1-3/4" | 1-1/4" | 3/4" | 1-5/16 - 12 |
| DPWP34 | #16 SAE | 1" | 2" | 1-3/4" | 1" | 3/4" | 1-5/16 - 12 |
| DPWP40 | #20 SAE | 1-3/4" | 2-3/8" | 1-7/8" | 1-3/4" | 7/8" | 1-5/8 - 12 |
| DPWP41 | #20 SAE | 1-1/4" | 2-3/8" | 1-7/8" | 1-1/4" | 7/8" | 1-5/8 - 12 |
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Female SAE O-Ring with 90° passage for pipe OD
| Part No. | Description | A - Dia. | B | C - Dia. | D - Dia. | E | F - Thread |
|---|---|---|---|---|---|---|---|
| DPWP07 | #6 SAE for 3/8" Pipe Weld Fitting | 1" | 1.025" | 11/16" | .39" | .45" | 9/16 - 18 |
| DPWP35 | #16 SAE for 1-1/16" OD Tube | 2" | 2-1/2" | 1.075" | 7/8" | 7/8" | 1-5/16 - 12 |
| DPWP36 | #16 SAE for 1-1/4" OD Tube | 2" | 2-1/2" | 1.260" | 1" | 1" | 1-5/16 - 12 |
| DPWP37 | #16 SAE for 1-1/4" OD Tube x #6 Guage Port | 2-1/2" | 2-1/8" | #6 O-Ring | 1-1/8" | 1-5/16 - 12 | |
| DPWP43 | #20 SAE for 1-3/4" OD Tube x #6 Guage Port | 2-3/4" | 2-1/4" | #6 O-Ring | 1-1/8" | 1-5/8 - 12 | |
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U-Flow Weld on Ports
| Part No. | Descrip. | A | B | C | D | E | F | G - Dia. | H - Dia. |
|---|---|---|---|---|---|---|---|---|---|
| DPWU08 | #8 SAE | 1-1/2" | 2-5/8" | 1-1/4" | 5/8" | 1" | 5/8" | 1/2" | 1/2" |
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U-Flow Rectangular Port
| Part No. | A | B | C | D | E | F | G - Dia. | H - Dia. | I | J |
|---|---|---|---|---|---|---|---|---|---|---|
| DPWF57 | 1-1/2" | 2-3/4" | 4.62" | 1-3/8" | 2.062" | 1.031" | 7/8" | 1-3/8" | 7/8" | .4" |
| #16 4 Bolt Flange, Flat, M10 x 1.5 U-Flow Code 61 | ||||||||||
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Flat Faced O-Ring & Flanged Ports
Male Flat Face O-Ring to ID of schedule 80 pipe with wrench hex
| Part No. | Style | A | B | C - Dia. | D - Thread | E - Dia. | F |
|---|---|---|---|---|---|---|---|
| DPWF04 | #4 MFOR to 1/4" Pipe | 9/16 - 18 | |||||
| DPWF06 | #6 MFOR to 3/8" Pipe | 11/16 - 16 | |||||
| DPWF08 | #8 MFOR to 1/2" Pipe | 1.27" | 1.12" | 0.535" | 13/16 - 16 | 0.37" | 7/8" |
| DPWF10 | #10 MFOR to 5/8" Pipe | 1 - 14 | |||||
| DPWF12 | #12 MFOR to 3/4" Pipe | 1.7" | 1.55" | 0.736" | 1-3/16 - 12 | 0.61" | 1-1/4" |
| DPWF16 | #16 MFOR to 1" Pipe | 1.6" | 1.45" | 0.94" | 1-7/16 - 12 | 0.81" | 1-1/2" |
| DPWF20 | #20 MFOR to 1-1/4" Pipe | 1-11/16 - 12 |
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| Part No. | Description |
|---|---|
| DPWF25 | #16 Code 61 x 1" Pipe Female Straight |
| DPWF26 | #16 Code 61 Through Flow with #16 ORB Side Port |
| DPWF27 | #16 Code 62 Through Flow with #16 ORB Side Port |
| DPWF30 | #16 Code 61 for Cylinders with Tapped Holes |
| DPWF41 | #16 Code 61 4 Bolt Flange, Flat, M10x1.5 |
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Pipe Weld On Coupler
| Part No. | Description |
|---|---|
| DPWC04 | 1/4" Schedule 80 Pipe Weld Coupler |
| DPWC06 | 3/8" Schedule 80 Pipe Weld Coupler |
| DPWC08 | 1/2" Schedule 80 Pipe Weld Coupler |
| DPWC10 | 5/8" Schedule 80 Pipe Weld Coupler |
| DPWC12 | 3/4" Schedule 80 Pipe Weld Coupler |
| DPWC16 | 1" Schedule 80 Pipe Weld Coupler |
| DPWC20 | 1-1/4" Schedule 80 Pipe Weld Coupler |
| DPWC24 | 1-1/2" Schedule 80 Pipe Weld Coupler |