Shop 6401-O Straight Male ORB - Male NPT
The Series 6401-O Straight Male ORB x Male NPT hydraulic adapters, made from durable carbon steel, are designed to provide secure and leak-proof connections in hydraulic systems. These adapters feature a male ORB (SAE Straight Thread O-ring Boss) connection on one end, which uses a straight UNF thread and an O-ring to create a leak-tight seal when compressed against a smooth, flat surface with a chamfer. This O-ring design, recommended by the National Fire Protection Association (NFPA) for medium and high-pressure systems, ensures reliable performance in hydraulic applications. On the other end, the male NPT (National Pipe Taper) connection features tapered threads that create a strong seal through thread deformation, ideal for fluid and gas transfer. The nominal pipe size is determined by measuring the thread diameter and subtracting 1/4". While NPT connections are suited for single assembly applications, they are not recommended for frequent disassembly due to potential thread wear. These adapters are perfect for professionals seeking dependable, high-quality hydraulic solutions in various applications.
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Shop 6401-O Straight Male ORB - Male NPT, Carbon Steel
Click on the model number in the chart below to view that adapter.
Need Stainless Steel? Click HERE for our Stainless 6401-O-SS Series Adapters. All adapters may not be available in stainless.
| Product SKU ▼ | Brand ▼ | Material ▼ | Pressure Rating ▼ | Male ORB Threads ▼ | Male NPT Threads ▼ | Lead Time ▼ | Price ▼ |
|---|---|---|---|---|---|---|---|
| 6401-02-02-O | OneHydraulics | Steel | 6000 | 5/16-24 (-02) | 1/8-27 (-02) | 1-3 Days | $6.32 |
| 6401-03-02-O | OneHydraulics | Steel | 6000 | 3/8-24 (-03) | 1/8-27 (-02) | 1-3 Days | $6.27 |
| 6401-04-02-O | OneHydraulics | Steel | 6000 | 7/16-20 (-04) | 1/8-27 (-02) | 1-3 Days | $2.67 |
| 6401-05-02-O | OneHydraulics | Steel | 6000 | 1/2-20 (-05) | 1/8-27 (-02) | 1-3 Days | $5.64 |
| 6401-05-04-O | OneHydraulics | Steel | 6000 | 1/2-20 (-05) | 1/4-18 (-04) | 1-3 Days | $7.68 |
| 6401-06-02-O | OneHydraulics | Steel | 6000 | 9/16-18 (-06) | 1/8-27 (-02) | 1-3 Days | $13.13 |
| 6401-08-08-O | OneHydraulics | Steel | 6000 | 3/4-16 (-08) | 1/2-14 (-08) | Same Day | $3.60 |
| 6401-08-12-O | OneHydraulics | Steel | 5500 | 3/4-16 (-08) | 3/4-14 (-12) | 1-3 Days | $5.62 |
| 6401-10-04-O | OneHydraulics | Steel | 6000 | 7/8-14 (-10) | 1/4-18 (-04) | Same Day | $7.97 |
| 6401-10-06-O | OneHydraulics | Steel | 6000 | 7/8-14 (-10) | 3/8-18 (-06) | Same Day | $4.65 |
| 6401-10-08-O | OneHydraulics | Steel | 6000 | 7/8-14 (-10) | 1/2-14 (-08) | Same Day | $4.96 |
| 6401-10-12-O | OneHydraulics | Steel | 5500 | 7/8-14 (-10) | 3/4-14 (-12) | Same Day | $5.96 |
| 6401-12-06-O | OneHydraulics | Steel | 6000 | 1-1/16-12 (-12) | 3/8-18 (-06) | Same Day | $6.40 |
| 6401-12-08-O | OneHydraulics | Steel | 6000 | 1-1/16-12 (-12) | 1/2-14 (-08) | Same Day | $5.86 |
| 6401-12-12-O | OneHydraulics | Steel | 5500 | 1-1/16-12 (-12) | 3/4-14 (-12) | Same Day | $5.72 |
| 6401-12-16-O | OneHydraulics | Steel | 4500 | 1-1/16-12 (-12) | 1-11-1/2 (-16) | 1-3 Days | $8.55 |
| 6401-14-12-O | OneHydraulics | Steel | 5500 | 1-3/16-12 (-14) | 3/4-14 (-12) | Same Day | $19.72 |
| 6401-14-16-O | OneHydraulics | Steel | 4500 | 1-3/16-12 (-14) | 1-11-1/2 (-16) | 1-3 Days | $17.92 |
| 6401-16-12-O | OneHydraulics | Steel | 5500 | 1-5/16-12 (-16) | 3/4-14 (-12) | Same Day | $7.83 |
| 6401-16-16-O | OneHydraulics | Steel | 4500 | 1-5/16-12 (-16) | 1-11-1/2 (-16) | 1-3 Days | $7.30 |
| 6401-16-20-O | OneHydraulics | Steel | 3000 | 1-5/16-12 (-16) | 1-1/4-11-1/2 (-20) | 1-3 Days | $10.60 |
| 6401-20-12-O | OneHydraulics | Steel | 4000 | 1-5/8-12 (-20) | 3/4-14 (-12) | 1-3 Days | $35.53 |
| 6401-20-16-O | OneHydraulics | Steel | 4000 | 1-5/8-12 (-20) | 1-11-1/2 (-16) | 1-3 Days | $13.28 |
| 6401-20-20-O | OneHydraulics | Steel | 3000 | 1-5/8-12 (-20) | 1-1/4-11-1/2 (-20) | Same Day | $10.90 |
| 6401-24-16-O | OneHydraulics | Steel | 3000 | 1-7/8-12 (-24) | 1-11-1/2 (-16) | Same Day | $51.57 |
| 6401-24-20-O | OneHydraulics | Steel | 3000 | 1-7/8-12 (-24) | 1-1/4-11-1/2 (-20) | 1-3 Days | $21.58 |
| 6401-24-24-O | OneHydraulics | Steel | 3000 | 1-7/8-12 (-24) | 1-1/2-11-1/2 (-24) | 1-3 Days | $20.27 |
| 6401-32-32-O | OneHydraulics | Steel | 2000 | 2-1/2-12 (-32) | 2-11-1/2 (-32) | 1-3 Days | $34.40 |
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Items in this collection are equivalent or similar to Series Dayco 6401, Flodar R1000, L&L SAPC-11, Lenz APN,
Parker Tube F5F, Piper 380, Trident 1264-[R], United Tech 29, Weatherhead C3249.
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.