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Anyone know what the set screw size is? I lost mine since I didn't Loctite it and it fell out while shooting. — 4 Answers

by Jeff, from VA, United States Asked on December 3, 2018

Name Strike Industries AR Enhanced Castle Nut /Extended End Plate (4.7)
As Low As $57.95 Save $3.00
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Answered by Ethan C., Gear Expert, from IL, United States, on May 08, 2019

Unfortunately we do not have the set screw size, you would have to contact the manufacturer for that part. You can reach them here: https://www.strikeindustries.com/shop/product-tech-support

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Answered by Clayford, member, from KY, United States, on November 02, 2019

it's a 4-40 screw. You'll need to trim about 1/8" to 1/4" of the spring off with a pair of diag. cutters.

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Answered by Mark M, member, from CA, United States, on September 11, 2019

4-40 is the size

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Answered by Williamm Curran, member, from FL, United States, on December 09, 2023

Order them from SI I ordered 2 and they sent me 8

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Last updated 2025-11-12 UTC.