Attributes

Brand	-
Category	Electronic Components Market / Other Components
Origin	-
Compatibility	Agilent Power Supply Series
Material	High-Grade ABS Plastic
Color	Black with White Indicator Line
Shaft Diameter	6.35mm (1/4 inch)
Outer Diameter	28mm
Height	18mm
Mounting Type	Push-On Fit
Package Quantity	2 Pieces per Pack
Weight	15 grams
Condition	New Replacement Part

6 reviews

Anonymous

Mar 28, 2026

Rating: 5/5

Perfect fit for old Agilent units

These knobs fit my older Agilent power supply perfectly. The friction is just right, not too loose or too tight. Great replacement for the worn-out originals.

Anonymous

Mar 26, 2026

Rating: 4/5

Decent alternative

Works well for the price. It doesn't feel quite as premium as the OEM part, but for a fraction of the cost, it gets the job done effectively.

Anonymous

Mar 22, 2026

Rating: 5/5

Saved my bench setup

I lost one of the original caps and couldn't find a spare. These work exactly as expected. The white indicator line is crisp and easy to read.

Anonymous

Mar 20, 2026

Rating: 5/5

Bulk buy for repairs

We use these frequently for repairing customer equipment. They are durable and withstand daily turning without cracking. Highly recommended for professional use.

Anonymous

Mar 20, 2026

Rating: 5/5

Restored my vintage supply

My 1990s power supply looks brand new again. The knobs snap on securely and the rotation is smooth. Very happy with this purchase.

Anonymous

Mar 04, 2026

Rating: 4/5

Good quality, slightly different shade

The build quality is solid and they function well. The black color is a tiny bit lighter than the original chassis, but it's barely noticeable unless you look closely.

5 FAQ

Q: Do these come with a set screw?

A: No, these are push-on style caps that rely on friction fit and do not utilize set screws, matching the design of the original Agilent components.

Q: Is the plastic resistant to common lab solvents?

A: The ABS plastic offers good resistance to mild cleaning agents, but we recommend avoiding harsh solvents like acetone to prevent damage to the finish.

Q: Will these fit Agilent E3631A models?

A: Yes, these knob caps are designed to be compatible with the shaft sizes found on Agilent E3631A and similar series power supplies.

Q: Are these sold individually or in pairs?

A: Each package contains two knob caps, which is usually sufficient to replace a set of voltage and current control knobs on a single unit.

Q: What is the inner diameter of the shaft hole?

A: The inner diameter is approximately 6.35mm (1/4 inch), which is the standard size for most Agilent potentiometer shafts in this category.

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