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ABT ABS Import Tools 3/4 10 X 1 7/8" L COUPLING NUT 3900 1191 P5286021ABT-3900-1191 https://cdnimages.opentip.com/full/ABT/ABT-3900-1191.jpg ABS Import Tools 3/4 10 X 1 7/8" L COUPLING NUT 3900 1191 Manufacturer part number: 3900-11913/4-10 X 1-7/8\" L Coupling NutCase hardened.Hex is 1-1/4\".Height is 1-7/8\". 5286021 0.4500lbs 0.00 0.00 0.00
ABS Import Tools
7.7200 2027-01-07 45 In Stock
customer review - by , October 10, 2025
5/ 5stars
It wasn't cheap, but it's a very well made and substantial coupling nut. It was exactly what I needed for my application.
customer review - by , December 12, 2022
5/ 5stars
Does the job well. Needed a coupler that would tighten down without threads giving way, and could handle a sizable load. I have times when I need a lengthy leverage bar and it is easier to couple two bars (example 2' amp; 4') together than to carry three or more bars. Have had others give out only after a couple of uses. This one is till holding up after several uses.

ABS Import Tools 3/4-10 X 1-7/8" L COUPLING NUT (3900-1191)

stars Rating 5 | 2 reviews
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SKU: ABT-3900-1191
Price: $7.72
Quantity:
45 In Stock
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Product Description

Manufacturer part number: 3900-1191

  • 3/4-10 X 1-7/8" L Coupling Nut
  • Case hardened.
  • Hex is 1-1/4".
  • Height is 1-7/8".

warning tips WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
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Customer Reviews
5 out of 5
5 stars
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By Mark
Date: October 13, 2025
It wasn't cheap, but it's a very well made and substantial coupling nut. It was exactly what I needed for my application.
Rating: 5 stars [5 of 5 Stars!]
By Calvin R.
Date: December 21, 2022
Does the job well. Needed a coupler that would tighten down without threads giving way, and could handle a sizable load. I have times when I need a lengthy leverage bar and it is easier to couple two bars (example 2' amp; 4') together than to carry three or more bars. Have had others give out only after a couple of uses. This one is till holding up after several uses.
Rating: 5 stars [5 of 5 Stars!]
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