Knob Springs - for half moon / D shafts

Knob Springs - for half moon / D shafts

Knob Springs - for half moon / D shafts image 1
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Knob Springs - for half moon / D shafts image 1
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Package of 6
Sold as a package of 6
In Stock

Assortment of knob springs for ½ moon shaft. ⅜" high x ~\frac{9}{32}~" outside dia. "D" shaped package of 6.

Item ID:
Product Measurements by Type
Item Diameter0.28125 in.
Item Height0.375 in.
Packaging Information
Packaging Dimensions1.885 in. × 2.825 in. × 0.183 in.
Weight (Packaging)0.0066 lbs.

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Questions and Answers

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Asked by Anonymous on December 19th, 2017.
Matt H.
December 21st, 2017
Staff Member
The flat portion is 7mm x 9.5mm.
August 13th, 2018
Just to clarify, is the length of the cylinder 9.5 mm? Is the large diameter, round-edge to round-edge, 7 mm? Is the short diameter, flat-edge to round-edge, 4.7 mm? If the description above is correct, then this clip will fit a 1/4" dia. shaft for you 'muricans that don't do metric.
August 14th, 2018
Staff Member
That is correct. These are designed to work with a 1/4" shaft.
Asked by Anonymous on December 10th, 2016.
Matt H.
December 14th, 2016
Staff Member
Hi, total length is 9.5mm, total width 7mm, and diameter is 4.7mm.
Asked by Anonymous on February 26th, 2021.
July 27th, 2021
No, the actual spring is too small
Asked by Anonymous on September 16th, 2021.
No answers yet!
Asked by Anonymous on January 25th, 2022.
No answers yet!
Asked by Anonymous on April 14th, 2022.
No answers yet!
Asked by Anonymous on September 28th, 2022.
No answers yet!
Asked by Anonymous on June 5th, 2023.
No answers yet!

Product Reviews

4.29 out of 5 based on 7 reviews
Joe Meinhardt - September 25th, 2023
4 out of 5

Hard to find and should function just fine!

D B - September 10th, 2022
5 out of 5

Worked and fit as designed

clint - August 13th, 2022
1 out of 5

Clips were too small for a standard 1/4-inch shaft.

Monroe - September 30th, 2021
5 out of 5

The knob springs were as described and at a fantastic price. Unfortunately they did not fit my range top knob shafts as when I took a closer look, the shafts we're not 1/2 circles but more like 2/3 circles. So the springs would not work in that situation. But ..... I'll use them somewhere else in the house! Again, thanks for a great price, good product and quick shipping. Maybe Antique Electric Supply has others. Will have to check.

gary d ketterman - May 25th, 2020
5 out of 5

Just what i needed to make genaric wooden knobs work on my antique radio.

Al S - September 15th, 2015
5 out of 5

These are common devices for old knob designs. Originals do fail and these are great parts to keep in inventory if you work on older gear. - April 1st, 2015
5 out of 5

My Coronado was ailing. The turned wooden knobs and band selector lever for PB, AM1 and AM2 were there, but the "D" inserts were gone and one of the knobs had a massive wowed out hole where the clip went, and another clip was just gone. I took some wax paper, some Vaseline and an old D shaft pot, and prepared a batch of epoxy to fill the hole. I greased up the D shaft wrapped it in wax paper and dumped epoxy into the hole on the knob. Then I slid the clip over the wax paper and stuck the pot into the knob and shimmed it so the knob was straight. I have repeated the process dozens of times by now and these clips are how you save those old knobs. New we have resin and molds, and 3D printers, so most knobs can be replicated. The 3D printed stuff varies in quality, but the D clips assure a good fit, no matter what!