SAME DAY SHIPPING
— Order by 2pm EST.
Toggle Nav
Cart
Search
main product photo

Steel Adapter, 1-1/16-12 Male SAE O-Ring Boss (Straight Thread O-Ring) To 3/4-14 Male NPT, Straight

Ask A Question

Description & Features

The BRENNAN INDUSTRIES INC Steel Adapter offers a reliable connection between a 1-1/16-12 Male SAE O-Ring Boss and a 3/4-14 Male NPT. This steel adapter ensures a secure and leak-proof transition, making it ideal for industrial applications requiring robust and durable fittings.

Designed with precision threads, the adapter provides excellent sealing performance, eliminating the need for additional thread sealant. Its construction from high-quality steel guarantees long-lasting durability and resistance to corrosion, ensuring consistent performance in harsh environments.

Specifically crafted for use with O-Ring Boss and NPT interfaces, the Steel Adapter, 1-1/16-12 Male SAE O-Ring Boss (Straight Thread O-Ring) To 3/4-14 Male NPT, Straight facilitates efficient fluid and gas transfer in various hydraulic and pneumatic systems.

With BRENNAN INDUSTRIES INC's commitment to quality, this adapter meets the highest industry standards, providing dependable performance and reliability in demanding conditions.

MPN: 6401-12-12-O

Supplier Part Number: 6401-12-12-O

Specifications

Brand
BRENNAN
Connection Size 1
3/4 in
Connection Size 2
3/4 in
Connection Type
Male SAE ORB, MNPT
Connection Type 1
Male SAE ORB
Connection Type 2
MNPTF
Dimension Standards
SAE J1926/J476
Dimensions
1.86 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
1-1/4
l Dimensions
1.73 in
Material
Steel
Material Construction
AISI 12L14/C1045 Steel
Maximum Operating Pressure
5000 psi
Operating Temperature
-40 to 250 deg F
Series
6401-O Series
Thread Sealant
Without Thread Sealant
Thread Size
1-1/16-12 x 3/4-14

Similar Products

Model Number Thread Size Thread 2 L Price Action
Steel Adapter, 3/4-16 Male SAE O-Ring Boss (Straight Thread O-Ring) To 3/8-18 Male NPT, Straight

6401-08-06-O Steel Male ORB To NPT Adapter

3/4-16 x 3/8-18

3/8-18

1.36

Steel Adapter, 3/4-16 Male SAE O-Ring Boss (Straight Thread O-Ring) To 1/2-14 Male NPT, Straight

6401-08-08-O Steel Male ORB To NPT Adapter

3/4-16 x 1/2-14

1/2-14

1.55

Steel Adapter, 3/4-16 Male SAE O-Ring Boss (Straight Thread O-Ring) To 3/4-14 Male NPT, Straight

6401-08-12-O Steel Male ORB To NPT Adapter

3/4-16 x 3/4-14

3/4-14

1.59

Steel Adapter, 7/8-14 Male SAE O-Ring Boss (Straight Thread O-Ring) To 3/8-18 Male NPT, Straight

6401-10-06-O Steel Male ORB To NPT Adapter

7/8-14 x 3/8-18

3/8-18

1.56

Steel Adapter, 7/8-14 Male SAE O-Ring Boss (Straight Thread O-Ring) To 1/2-14 Male NPT, Straight

6401-10-08-O Steel Male ORB To NPT Adapter

1/2-14 x 7/8-14

1/2-14

1.69

Steel Adapter, 1-1/16-12 Male SAE O-Ring Boss (Straight Thread O-Ring) To 1/2-14 Male NPT, Straight

6401-12-08-O Steel Male ORB To NPT Adapter

1-1/16-12 x 1/2-14

1/2-14

1.84

Steel Adapter, 7/16-20 Male SAE O-Ring Boss (Straight Thread O-Ring) To 1/8-27 Male NPT, Straight

6401-04-02-O Steel Male ORB To NPT Adapter

1/8-27, 7/16-20

1/8-27

1.07

Steel Adapter, 9/16-18 Male SAE O-Ring Boss (Straight Thread O-Ring) To 1/8-27 Male NPT, Straight

6401-06-02-O Steel Male ORB To NPT Adapter

9/16-18 x 1/8-27

1/8-27

1.11

Steel Adapter, 9/16-18 Male SAE O-Ring Boss (Straight Thread O-Ring) To 1/4-18 Male NPT, Straight

6401-06-04-O Steel Male ORB To NPT Adapter

1/4-18 x 9/16-18

1/4-18

1.29

Steel Adapter, 9/16-18 Male SAE O-Ring Boss (Straight Thread O-Ring) To 3/8-18 Male NPT, Straight

6401-06-06-O Steel Male ORB To NPT Adapter

3/8-18, 9/16-18

3/8-18

1.3

Steel Adapter, 9/16-18 Male SAE O-Ring Boss (Straight Thread O-Ring) To 1/2-14 Male NPT, Straight

6401-06-08-O Steel Male ORB To NPT Adapter

1/2-14 x 9/16-18

1/2-14

1.39

Steel Adapter, 3/4-16 Male SAE O-Ring Boss (Straight Thread O-Ring) To 1/4-18 Male NPT, Straight

6401-08-04-O Steel Male ORB To NPT Adapter

3/4-16, 1/4-18

1/4-18

1.24

Steel Adapter, 7/8-14 Male SAE O-Ring Boss (Straight Thread O-Ring) To 3/4-14 Male NPT, Straight

6401-10-12-O Steel Male ORB To NPT Adapter

3/4-14, 7/8-14

3/4-14

1.77

Steel Adapter, 1-5/16-12 Male SAE O-Ring Boss (Straight Thread O-Ring) To 1-11-1/2 Male NPT, Straight

6401-16-16-O Steel Male ORB To NPT Adapter

1-5/16-12 x 1-11-1/2 x 1-5/16-12

1-11-1/2

1.9

Steel Adapter, 1-5/8-12 Male SAE O-Ring Boss (Straight Thread O-Ring) To 1-1/4-11-1/2 Male NPT, Straight

6401-20-20-O Steel Male ORB To NPT Adapter

1-1/4-11-1/2, 1-5/8-12

1-1/4-11-1/2

2.17

Product Questions & Answers (3)

Question by: Kirk M on Jun 29, 2025, 3:24 PM
got a port on my hydraulic manifold that's tapped 3/4 NPT and I need to tie into a SAE straight thread line. this the right piece for that?
Answer by: Customer Support on Jul 1, 2025, 6:30 AM
that setup is exactly what this adapter handles. One end is 1-1/16-12 Male SAE O-Ring Boss, which is your straight thread O-ring side, and the other end is 3/4-14 Male NPT. So if your manifold port is female NPT and your line fitting is female MORB, this bridges those two together in a straight configuration. No angle, no offset, just a direct inline connection.
Question by: Danny C on Sep 6, 2025, 5:04 PM
got a hose end with 1-1/16-12 SAE o-ring boss on it, and my manifold port is 3/4-14 NPT. is this the right adapter to marry those up?
Answer by: Customer Support on Sep 8, 2025, 9:55 AM
For that exact thread combo, yes. One side is a 1-1/16-12 male SAE O-ring boss (straight thread O-ring) and the other side is a 3/4-14 male NPT, and it is a straight adapter.
Question by: Norm J on Dec 23, 2025, 3:22 PM
What size is that male NPT end on this fitting?
Answer by: Customer Support on Dec 25, 2025, 6:10 AM
It's got a 3/4-14 Male NPT end. That should get you sorted.

Tell us what you need and we'll get back to you.

Fields marked * are required.