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

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Description & Features

Part of the Eaton Aeroquip 2216 Series, this steel straight adapter connects a 1/8-27 female NPT port to a 7/16-20 male SAE O-Ring Boss (straight thread O-ring) port, with an overall length (A dimension) of 0.92 inches. The straight configuration makes it well-suited for direct, in-line connections where space allows a clean port-to-port transition.

Rated under commodity code 51460 and cataloged as C1BC76, this adapter is designed for use across demanding industrial environments including marine and military systems, chemical processing, pulp and paper, food and beverage processing, and offshore drilling applications. The SAE O-ring boss end provides a reliable, leak-resistant seal at the male thread, reducing the risk of fluid loss in high-cycle or high-vibration service conditions.

SKU: 2216-2-4S

Supplier Part Number (MPN): 2216-2-4S

Alternate Part Numbers: C1BC76, MI-00320194, MINO-00015F65785

Specifications

A
0.92
Alternate Part Numbers
Alternate Part Number C1BC76, Alternate Part Number MI-00320194, Alternate Part Number MINO-00015F65785, Alternate Part Number MINO-00925X09657
Application
Marine/Military, Chemical Processing, Pulp and Paper Industries, Food and Beverage Processing, Off-Shore Drilling
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13553
End Gender 2
13556
End Size 1
0.13
End Size 2
0.44
End Type 1
NPTF
End Type 2
SAE ORB
Minimum Working Temperature
-40
Supplier Part Number
2216-2-4S
Thread 1
1/8-27
Thread 2
7/16-20
Thread Sealant
No
Tube I.D. 1
0.17
Product Weight
0.01 lbs

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Product Questions & Answers (4)

Question by: Brenda T on Sep 10, 2025, 4:24 PM
trying to replace an adapter i pulled off a small line, how do i know this one matches up right
Answer by: Customer Support on Sep 11, 2025, 9:27 PM
Fit comes down to the two ends and their thread sizes. This adapter is 1/8-27 female NPTF on one side and 7/16-20 male SAE O-Ring Boss on the other, in a straight (non-angled) body style.
Question by: Jean T on Jul 23, 2025, 6:07 AM
got a valve port that’s 1/8-27 female NPT. is this the piece that’ll step me over to a 7/16-20 ORB?
Answer by: Customer Support on Jul 24, 2025, 11:20 AM
For that setup, you’re on the right track. This adapter is a straight Danfoss / Eaton 2216 series fitting that goes from 1/8-27 female NPT on one side to 7/16-20 male SAE O-Ring Boss (straight thread O-ring) on the other.
Question by: Hubert B on Dec 19, 2025, 7:50 AM
what industries is this adapter actually made for? trying to figure out if it'll hold up in our processing environment before we order a bunch of em
Answer by: Customer Support on Dec 21, 2025, 6:12 AM
Marine, military, chemical processing, pulp and paper, food and beverage, and offshore drilling are all listed applications for this adapter. If your environment falls anywhere in that range, it's a reasonable fit. The steel construction and SAE O-ring boss connection are well suited to demanding industrial settings where a leak-free seal matters.
Question by: Ross H on Oct 1, 2025, 4:09 PM
Will this adapter work for connecting a pressure gauge that has a 1/8 NPT fitting to a hydraulic system with a SAE O-ring boss port?
Answer by: Customer Support on Oct 3, 2025, 9:33 AM
Yes, it's designed to adapt a 1/8-27 female NPT to a 7/16-20 male SAE O-Ring Boss, which should work for your pressure gauge application.