Shop 6408-O-SS Stainless External Hex Male ORB Plugs

SAE 090109A

The Series 6408-O-SS External Hex Male ORB Plugs are durable and reliable fittings designed to seal unused ORB (O-Ring Boss) ports in hydraulic and fluid power systems. Made from stainless steel, these plugs feature an external hex design, enabling easy installation and removal with standard wrenches. The ORB threads ensure a secure, leak-free connection by compressing the O-ring into the chamfer of the mating surface. The stainless steel construction offers exceptional corrosion resistance, making these plugs ideal for use in harsh environments and high-pressure applications. The Series 6408-O-SS plugs provide long-lasting performance and are essential for preventing fluid leakage and maintaining system integrity during maintenance or testing.

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Male ORB Plugs

1/8" to 2" Nominal Tube OD

Stainless Steel

Click HERE to view the entire 6408-O-SS Stainless Steel Plug MORB Selection

Click HERE to view the entire 6408-O Carbon Steel Plug MORB Selection

Shop 6408-O-SS Stainless External Hex Male ORB Plugs

Click on the model number in the chart below to view that adapter.

Need Carbon Steel? Click HERE for our Steel 6408-O Series Adapters.


Product SKU Brand Material Male ORB Threads Lead Time Price
6408-02-O-SS OneHydraulics Stainless Steel 5/16-24 (-02) 1-3 Days $6.02
6408-03-O-SS OneHydraulics Stainless Steel 3/8-24 (-03) 1-3 Days $5.91
6408-04-O-SS OneHydraulics Stainless Steel 7/16-20 (-04) 1-3 Days $5.34
6408-05-O-SS OneHydraulics Stainless Steel 1/2-20 (-05) 1-3 Days $7.66
6408-06-O-SS OneHydraulics Stainless Steel 9/16-18 (-06) 1-3 Days $6.77
6408-08-O-SS OneHydraulics Stainless Steel 3/4-16 (-08) 1-3 Days $8.05
6408-10-O-SS OneHydraulics Stainless Steel 7/8-14 (-10) 1-3 Days $10.88
6408-12-O-SS OneHydraulics Stainless Steel 1-1/16-12 (-12) 1-3 Days $14.55
6408-14-O-SS OneHydraulics Stainless Steel 1-3/16-12 (-14) 1-3 Days $19.43
6408-16-O-SS OneHydraulics Stainless Steel 1-5/16-12 (-16) 1-3 Days $18.22
6408-20-O-SS OneHydraulics Stainless Steel 1-5/8-12 (-20) 1-3 Days $95.45
6408-24-O-SS OneHydraulics Stainless Steel 1-7/8-12 (-24) 1-3 Days $161.27
6408-32-O-SS OneHydraulics Stainless Steel 2-1/2-12 (-32) 1-3 Days $180.25
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Items in this collection are equivalent or similar to Series Aeroquip 900598, Dayco 6408, Flodar R77, Form Rite 64, Gates MB-PLUG, Imperial 721-FSO, L&L SA-17, Lenz A3105P, Parker Tube P50N, Parker Hose 05CP, Piper 510, SSP GP, Strata Flex 16339-[R], Trident 1255, United Tech 33, Weatherhead 7237.

See the chart below for additional Dimensional Detail & Pressure Ratings




Still need help? Give us a call at 281.941.2310 or email us at sales@onehydraulics.com for technical support.