Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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America's Oldest Speed Shop ®


Seat Belt Installation Kit

Material Type:
Sold in Quantity:
Inside Diameter:
Outside Diameter:
Thread Length:
Thread Pitch:
RH Male
Garage Sale:
Includes two plate washers, two bolts, two split washers, and two nuts.
Seat Belt Installation Kit

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Please NOTE the following about this product:

  • This item is sold as a kit.



Q & A

What's in the Box

Don't jeopardize your safety with a hodge-podge of hardware store pieces. This kit is specifically engineered to securely mount your seat belts.   

Kit includes:

  • (2) 7/16"-20 x 1-1/2" SAE fine thread bolts
  • (2) 7/16"-20 nuts
  • (2) lock washers
  • (2) 2.44" O.D. large flat 11-gauge washers

You may also be interested in:

Eye Bolt Nut and Washer
(Part #63031018)

This eye bolt kit consists of 7/16" NF eye bolt with 1-1/2" shank. Includes large diameter washer and nut. Can be used in many existing seat belt holes.

  • Washer is 2.466 O.D. or nearly 2-1/2”
  • Center hole is 7/16”
  • Thickness is approximately 3/32” or 11 gauge
  • Eyebolt is 7/16 fine thread with thread length 1.583 or about 1-9/16”
  • Overall length is 3 1/8”
  • Eye O.D. is 1-1/4” and I.D. is .621 or nearly 5/8”
  • Nut is 7/16 UNF nylock


Clip-In Conversion Kit
(Part #63031020)

Convert your harness from bolt-in to clip-in with this kit. All heavy duty hardware and snap hook. Two bolts, two washers, two clips.

  • Shank diameter is .434 or 7/16 X 20 threads per inch
  • Shank thread length is approximately 1 5/8"
  • Overall length including the eye is 3 1/8"
  • Washer diameter is 2 1/2" with 7/16" hole
  • Fits 2 inch wide belts