Brake light switch includes 3/8" IFM adapter fitting so you can screw right into an inverted flare brake fitting, This brake light switch has a male 1/8" NPT thread, Features two 1/4" wide male spade terminals, Liquid filled gauges dampen vibration for more accurate readings, Great deal for an even better price
Brake Light Switch with 3/8 Inch IFM Adapter Fitting Speedway Motors
Brake Light Switch with 3/8 Inch IFM Adapter Fitting
Sku # 91031304
Mfr. Part # 91031304
Condition
New
Brand
Speedway Motors
Sold
Each
Details

This brake light switch has a male 1/8" NPT thread and includes a female 1/8" NPT to a 3/8"-24 I.F. male thread adapter so you can screw it right into an inverted flare brake fitting.

  • Designed to be installed into a 3/8"-24 inverted flare female fitting
  • Switch has two 1/4" wide male spade terminals
  • 3/8"-24 IFM thread adapter included

NOTE:   If using residual valves in conjunction with this switch, we recommend installing the switch in-line before the residual valves.

Specs
Thread Pitch
1/8" NPT Male w/ 3/8"-24 I.F. Male adapter
Terminal Type
Spade
Sold in Quantity
Each
Notes
SWITCH 425100186ERL
MFG. Part #
91031304
Reviews

It worked! I'm recommending this brake light switch!

Rated
Product Rating
by GD. on September 29, 2025

Summary: It was easy to install.

Yes, I recommend this product.

Quality was not what I expected.

Rated
Product Rating
by Carl on October 15, 2024

Summary: The adapter was what I needed, but the threads on the brake light switch seemed not to be clean. I used my old brake light switch and it threaded in perfectly.

No, I would not recommend this product.

I would buy again

Rated
Product Rating
by Cruise on May 29, 2024

Summary: Worked great in my 49 Ford pickup restoration.

Yes, I recommend this product.

Yes

Rated
Product Rating
by No on September 28, 2023

Summary: Works well

Yes, I recommend this product.

Great product as always

Rated
Product Rating
by denbob on June 15, 2023

Summary: I have built four cars using these, always work perfect

Yes, I recommend this product.

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Tech Support
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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.