04MORB EXTERNAL HEX HEAD PLUG

Description & Features

Crafted from straight steel, the 04MORB External Hex Head Plug is designed for durability and precision in demanding industrial applications. Featuring a male SAE O-Ring Boss thread type, this plug ensures a reliable seal, minimizing the risk of leaks in hydraulic systems. With a thread size of 7/16-20 and adhering to the SAE J514 specification, it meets industry standards for quality and performance. The external hex head design allows for easy installation and removal, providing efficiency for maintenance tasks.

The plug incorporates an NBR O-ring seal material, known for its excellent oil resistance and ability to function effectively in a wide range of temperatures. Measuring an overall length of 0.670 mm, this plug is a component of the Brennan series 6408-O, representing a trusted choice for professionals. Ideal for various hydraulic applications, this plug supports efficient system use while maintaining integrity under pressure.

SKU: 6408-04-O-SOLID

Supplier Part Number (MPN): 6408-04-O-SOLID

Specifications

Brand
BRENNAN
Connection Size 1
1/4 in
Connection Type
Male SAE ORB
Connection Type 1
Male SAE ORB
Dimension Standards
SAE J1926, SAE J514
Dimensions
0.67 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Plug
Hex Size
0.563 in
Material
Steel
Material Construction
AISI 12L14/1045 Steel
O-ring Seal Material
NBR
Operating Temperature
-40 to 250 deg F
Series
6408-O Series
Thread Size
7/16-20

Product Questions & Answers (1)

Question by: Neil M on Feb 25, 2026, 2:07 PM
What size wrench do I need to tighten this plug? I'm assuming it's a standard hex head size?
Answer by: Customer Support on Feb 27, 2026, 6:11 AM
This external hex head plug is designed for easy installation and removal with a standard wrench, making maintenance pretty straightforward.

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