+1-800-504-5897 Live Chat Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

JP Enterprises Jam Nut 1/2X28 Up to 35% Off — 6 models

JP Enterprises Jam Nut 1/2X28 .750, Black JPJN-12B-750
JP Enterprises Jam Nut 1/2X28 .750 Stainless, Silver JPJN-12S.750
JP Enterprises Jam Nut 1/2X28 .875 Black, Black JPJN-12B.875
JP Enterprises Jam Nut 1/2X28 .875 Stainless, Silver JPJN-12S.875
JP Enterprises Jam Nut 1/2X28 .925 Black, Black JPJN-12B.925
JP Enterprises Jam Nut 1/2X28 .925 Stainless, Silver JPJN-12S.925
JP Enterprises Jam Nut 1/2X28 .750, Black JPJN-12B-750
JP Enterprises Jam Nut 1/2X28 .750 Stainless, Silver JPJN-12S.750
JP Enterprises Jam Nut 1/2X28 .875 Black, Black JPJN-12B.875
JP Enterprises Jam Nut 1/2X28 .875 Stainless, Silver JPJN-12S.875
JP Enterprises Jam Nut 1/2X28 .925 Black, Black JPJN-12B.925
JP Enterprises Jam Nut 1/2X28 .925 Stainless, Silver JPJN-12S.925
JP Enterprises Jam Nut 1/2X28 .750, Black JPJN-12B-750
1 of 12 images
JP Enterprises Jam Nut 1/2X28 .750, Black JPJN-12B-750
JP Enterprises Jam Nut 1/2X28 .750 Stainless, Silver JPJN-12S.750
2 of 12 images
JP Enterprises Jam Nut 1/2X28 .750 Stainless, Silver JPJN-12S.750
JP Enterprises Jam Nut 1/2X28 .875 Black, Black JPJN-12B.875
3 of 12 images
JP Enterprises Jam Nut 1/2X28 .875 Black, Black JPJN-12B.875
JP Enterprises Jam Nut 1/2X28 .875 Stainless, Silver JPJN-12S.875
4 of 12 images
JP Enterprises Jam Nut 1/2X28 .875 Stainless, Silver JPJN-12S.875
JP Enterprises Jam Nut 1/2X28 .925 Black, Black JPJN-12B.925
5 of 12 images
JP Enterprises Jam Nut 1/2X28 .925 Black, Black JPJN-12B.925
JP Enterprises Jam Nut 1/2X28 .925 Stainless, Silver JPJN-12S.925
6 of 12 images
JP Enterprises Jam Nut 1/2X28 .925 Stainless, Silver JPJN-12S.925
JP Enterprises Jam Nut 1/2X28 .750, Black JPJN-12B-750
7 of 12 images
JP Enterprises Jam Nut 1/2X28 .750, Black JPJN-12B-750
JP Enterprises Jam Nut 1/2X28 .750 Stainless, Silver JPJN-12S.750
8 of 12 images
JP Enterprises Jam Nut 1/2X28 .750 Stainless, Silver JPJN-12S.750
JP Enterprises Jam Nut 1/2X28 .875 Black, Black JPJN-12B.875
9 of 12 images
JP Enterprises Jam Nut 1/2X28 .875 Black, Black JPJN-12B.875
JP Enterprises Jam Nut 1/2X28 .875 Stainless, Silver JPJN-12S.875
10 of 12 images
JP Enterprises Jam Nut 1/2X28 .875 Stainless, Silver JPJN-12S.875
JP Enterprises Jam Nut 1/2X28 .925 Black, Black JPJN-12B.925
11 of 12 images
JP Enterprises Jam Nut 1/2X28 .925 Black, Black JPJN-12B.925
JP Enterprises Jam Nut 1/2X28 .925 Stainless, Silver JPJN-12S.925
12 of 12 images
JP Enterprises Jam Nut 1/2X28 .925 Stainless, Silver JPJN-12S.925

Tap Tap to Zoom

Government Export Restriction Government Export Restriction
Questions & Answers
will this jam nut fit a ruger pc carbine 9mm Expert Answer

As long as the thread pitch is 1-2x28 it will work.

by Todd, Gear Expert, August 27, 2021
Can this be used in conjunction with a qd muzzle device for use with a suppressor? Or will it throw off the barrel/qd mount bore alignment? Expert Answer

I don't see any reason it would throw off the bore alignment.

by Todd, Gear Expert, August 27, 2021
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
Serves it's Purpose by Pierce, Verified Owner, December 14, 2020
I needed a little extra head room for my compensator and this did the trick. I purchased JPJN-12B-750 which is 3/8 in. thick. Not much to say, threads are solid and the machining is good. Finish is nice and not an afterthought. If you want to add som...
Read More...
2/2 found this helpful
Most Recent Reviews
Simple well made solution by OldBones, Verified Owner, October 16, 2025
Like anything JPE provides it is well machined. I would recommend this and other items by JPE...
Most Recent Reviews
Very well made by Mark Johnson, Verified Owner, November 2, 2024
Precision timing nut for brakes and comps. Don't go cheap on these necessary parts. The threads are clean and precise and it just works.
Most Recent Reviews
best jam nut out there by Casey Osborn, Verified Owner, December 14, 2023
JP Enterprises makes good stuff and I really like their jam nuts They seem to match mil spec parts better and can't beat the quality. I've never had one come loose This one is just for looks as it will be behind a SOLGW nox 9 13.7 build
Most Recent Reviews
Serves it's Purpose by Pierce, Verified Owner, December 14, 2020
I needed a little extra head room for my compensator and this did the trick. I purchased JPJN-12B-750 which is 3/8 in. thick. Not much to say, threads are solid and the machining is good. Finish is nice and not an afterthought. If you want to add som...
Read More...
Read All 5 Reviews

Earn Bonus Bucks

Learn more about OpticsPlanet Bucks
10% Bonus Bucks
Get even more OpticsPlanet Bucks with the purchase of select models to use on future purchases! You will find the amount you'll earn near eligible models.
Show In Stock Only
6 Models Available

Show with deals only:

Bonus Bucks
Color
All
Additional Features
All
Search

Product Info for JP Enterprises Jam Nut 1/2X28

Intended to be a very good item for pretty much anybody, we're sure you will appreciate the JP Enterprises Jam Nut 1/2X28.image

Formulated by using some of the most extremely durable and dependable resources in existence, these Rifle Parts by JP Enterprises will provide you with a product that will give many years of consistency.

JP Enterprises has been developing high quality merchandise for a number of years, and the JP Enterprises Jam Nut 1/2X28 is their particular way of demonstrating how much they are concerned.

Right here at OpticsPlanet, we ensure that it is our responsibility to get the best product for all your requirements, and featuring the JP Enterprises Jam Nut 1/2X28 is something that we are pleased to offer.

Features of JP Enterprises Jam Nut 1/2X28:

  • Jam Nut
  • 1/2 x 28
  • Superior construction
  • Reliable and long lasting materials

Package Contents:

  • JP Enterprises Jam Nut 1/2X28

JP Enterprises Jam Nut 1/2X28 Orderable Models

List of Orderable Models

  • JP Enterprises Jam Nut 1/2X28 .750, Black JPJN-12B-750 , MPN: JPJN-12B-750 , UPC: 812872021904 , Code: J5-CPW-JAM1228-JPJN-12B-750
  • JP Enterprises Jam Nut 1/2X28 .750 Stainless, Silver JPJN-12S.750 , MPN: JPJN-12S.750 , UPC: 812872021911 , Code: J5-CPW-JAM1228-JPJN-12S-750
  • JP Enterprises Jam Nut 1/2X28 .875 Black, JPJN-12B.875 , MPN: JPJN-12B.875 , UPC: 812872021928 , Code: J5-CPW-JAM1228-JPJN-12B-875
  • JP Enterprises Jam Nut 1/2X28 .875 Stainless, Silver JPJN-12S.875 , MPN: JPJN-12S.875 , UPC: 812872021935 , Code: J5-CPW-JAM1228-JPJN-12S-875
  • JP Enterprises Jam Nut 1/2X28 .925 Black, Black JPJN-12B.925 , MPN: JPJN-12B.925 , UPC: 812872021942 , Code: J5-CPW-JAM1228-JPJN-12B-925
  • JP Enterprises Jam Nut 1/2X28 .925 Stainless, Silver JPJN-12S.925 , MPN: JPJN-12S.925 , UPC: 812872021959 , Code: J5-CPW-JAM1228-JPJN-12S-925
Compare (0)
1 item has been added
Add at least two items to compare