Wattgate IEC does not fit tight.

Not sure about the Wattgates, but these inexpensive 'iec inlet tighteners work for a variety of PC / components and are easy  to try:

https://www.amazon.com/dp/B0771T7PC9?ref=ppx_yo2ov_dt_b_fed_asin_title

It would help to know what amp the OP has.

Example: Reading some posts of the OP’s.

Mark Levinson - No 585 Integrated Amplifier

I don’t think any audiophile power cord will fit properly on the ML 585.

The OEM or a cheap $6 computer cord will work fine.

The IEC keeps disconnecting from the amp due to not fitting tight. I replaced it with a 350i and it won’t even connect now. It seems the part that connects to the amp are too far inside the IEC. It falls out immediately.

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It is a Levinson 585. Do they use a different socket? It is strange that a $6 generic cord works but the audiophile IEC will not.

@pal,

This should solve your problem.

Shunyata - C14-C13 Universal Cable Adapter 

12 Gauge Conductors.

$50.00.

Free shipping.

60 day satisfaction guarantee.

This one-of-a-kind Universal Power Adaptor allows anyone to realize the benefits of high-performance power cords, no matter the application or space constraints. (Overall length of the Universal Power Adapter is 12 inches; actual cable length is seven inches.)

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Shunyata UNIVERSAL POWER ADAPTER

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I use the entry level FURUTECH Audio FI-15 Plus IEC's. They are $50-$55 on eBay. They fit butt tight and dont move, plus high quality.