4J Series JIC Male 74° Cone Plug Adapters

The 4J Series JIC Male 74° Cone Plug is a straight hydraulic plug adapter designed to seal off compatible JIC female 74° flare swivel connections or hose assemblies.
The connection features a JIC male 74° cone design, which allows it to mate securely with standard JIC female 74° swivel flare nuts.
This plug provides a practical sealing solution for hydraulic systems when temporarily or permanently closing off inch-based JIC lines or ports. Multiple thread sizes are available, ranging from 5/16"-24 to 2-1/2"-12.
The product range includes different body dimensions to accommodate various connection requirements. Before ordering, customers should verify thread specifications, sealing interfaces, and required installation dimensions.

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Product Description

4J Series JIC Male 74° Cone Plug Adapter The 4J Series Plug is a hydraulic fitting designed to securely seal matching JIC female flare connection interfaces. The plug features a JIC male 74° cone design, making it ideal for plugging off unused lines, ports, or hose ends during maintenance or system modifications. This fitting is useful when hydraulic equipment or piping systems require a reliable closure for inch-based JIC components. Its compact plug configuration ensures a tight and secure seal under proper installation.

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The supplied dimensional table lists multiple thread sizes, together with key dimensions A, L, and S1. These details help buyers identify the appropriate part number for their installation requirements. NBFK can discuss OEM and customized hydraulic adapter requirements according to customer drawings, samples, or confirmed technical specifications.

Features

JIC male 74° cone connection design

Plug configuration for sealing JIC lines or ports
Designed for compatible JIC hydraulic connections
Metric stud/body hex wrench dimensions (S1) for global tool compatibility
Multiple inch thread sizes available
Dimensional data provided for part selection
OEM and customized requirements can be discussed

Specifications

PART NO.	THREAD	DIMENSIONS
PART NO.	E	A	L	S1
4J-02Z	5/16"X24	11.4	17.5	11
4J-03Z	3/8"X24	12.2	18	12
4J-04Z	7/16"X20	14	20.5	12
4J-05Z	1/2"X20	14	20.5	14
4J-06Z	9/16"X18	14.1	21.5	17
4J-08Z	3/4"X16	16.7	24	22
4J-10Z	7/8"X14	19.3	28	24
4J-12Z	1.1/16"X12	21.9	32.5	30
4J-14Z	1.3/16"X12	22.6	33.3	32
4J-16Z	1.5/16"X12	23.1	34	36
4J-20Z	1.5/8"X12	24.3	37	46
4J-24Z	1.7/8"X12	27.5	42	50
4J-32Z	2.1/2"X12	33.9	52	65

Applications

The 4J Series is intended for hydraulic connection applications where compatible JIC 74° flare interfaces must be securely plugged or sealed. Potential application areas include:

Hydraulic machinery and heavy equipment
Industrial hydraulic power units and fluid systems
Hydraulic tube and piping assemblies
Sealing off unused hydraulic lines, ports, or hose ends during system maintenance
Equipment requiring temporary or permanent closure of inch-based JIC connections

Final suitability depends on the selected thread specification, port design, sealing requirements, material, and system operating conditions.

hydraulic plug