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Steel Adapter, 3/4-16 Male SAE O-Ring Boss (Straight Thread O-Ring) Hex Plug

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Description & Features

This steel adapter is part of the Danfoss / Eaton 900598 series of straight adapters. The fitting features a 3/4-16 male SAE O-Ring Boss (Straight Thread O-Ring) Hex Plug.

Designed for use in various applications, including marine/military, chemical processing, pulp and paper industries, food and beverage processing, and off-shore drilling, this Straight Thread O-Ring to Straight Thread O-Ring Adapters offers reliable performance in demanding environments. The adapter has a minimum working temperature of -40 degrees.

This Steel Adapter features end 1 with a male_1 gender, SAE ORB type, and 0.75 size; end 2 has a female_2 gender, ORB type, and 0.5 size. The thread 2 size is 3/4-16 with thread sealant of 0. The included seal part is 22617-8.

SKU: 900598-8S

Supplier Part Number (MPN): 900598-8S

Alternate Part Numbers: C1CB13, MI-00320623, MINO-00015F65921

Specifications

A
0.80
Alternate Part Numbers
Alternate Part Number C1CB13, Alternate Part Number MI-00320623, Alternate Part Number MINO-00015F65921
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
13554
End Gender 2
13555
End Size 1
0.75
End Size 2
0.50
End Type 1
SAE ORB
End Type 2
ORB
Minimum Working Temperature
-40
Seal Part if Included
22617-8
Supplier Part Number
900598-8S
Thread 2
3/4-16
Thread Sealant
No
Product Weight
0.04 lbs

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Product Questions & Answers (4)

Question by: Melvin C on Dec 12, 2025, 7:10 PM
got a spot on a marine hydraulic line that needs plugging off, will this fitting handle saltwater environments alright?
Answer by: Customer Support on Dec 14, 2025, 8:24 AM
Marine service is one of the listed applications for this adapter, so saltwater exposure was part of the design consideration. It's steel construction, rated down to negative 40 degrees minimum working temperature, and the SAE O-Ring Boss thread configuration gives you a positive seal that doesn't rely on thread sealant. That combo holds up better in wet, corrosive conditions than a lot of pipe thread alternatives.
Question by: Ralph H on Feb 10, 2026, 9:19 PM
Will this plug hold up in a saltwater environment on my boat?
Answer by: Customer Support on Feb 12, 2026, 6:08 AM
This steel adapter is suitable for marine applications.
Question by: Tommy W on Mar 25, 2025, 4:41 PM
trying to replace a straight thread o-ring boss plug, is this one the 3/4-16 male ORB?
Answer by: Customer Support on Mar 27, 2025, 8:34 AM
It’s a 3/4-16 male SAE O-Ring Boss (straight thread O-ring) hex plug, and it includes seal part 22617-8.
Question by: Todd W on Jan 21, 2026, 6:45 AM
got a port that’s 3/4-16 SAE O-ring boss, is this the right hex plug to cap it off?
Answer by: Customer Support on Jan 22, 2026, 8:56 PM
For a 3/4-16 male SAE O-ring boss (straight thread O-ring) plug, this part matches that thread callout and is meant to cap off an SAE ORB port using an O-ring seal.