3/8-16 J995 GR 2 Heavy Square Nut Zinc Clear Trivalent


  • WEIGHT: 0.0370 lbs.
  • DIAM: 0.3750 (3/8)
  • GRADE: GR 2
  • FINISH: Zinc Clear Trivalent
  • THREAD: 16

$0.76 /pc


Add to Cart

185 available

Request Tech Specs

Product Description

product thumbnail

Heavy Square Nut

Choo choo! You’ll typically find Heavy Square nuts used with square head bolts in locomotive applications, but we’ve seen them used in the mining, construction, agriculture, automotive and alternative energy industries. You can use heavy square nuts for wood projects as well. Whatever fits your fancy, BigBolts carries the grade 5 strength you need in diameters of 1 inch, 1 1/8 inch and 1 ¼ inch. We have them in Coarse (UNC) threads and plain finish. Log-in here to place your order!

Specifications: Dimensions per ASME B18.2.2
Physical properties per SAE J995 Grade 5 or SAE J995 Grade 2

There's stuff in your cart. We think that's smart.


Please correct the following before continuing:

You and Us


Chances are, as you're reading this, there is some dirt under your fingernails and perhaps scabs on your knuckles. You are the bold one who doesn't shy away from removing a few bolts and nuts to see what's going on. You're reading this because you want to make sure you are dealing with a company that you can rely on to supply the right parts when you need them. And, whatever big project you are working on now, is a stepping stone for a bigger one. If that assessment feels right, go ahead and let us know.


We exist for one reason: there are big machines out there that need big bolts and nuts to hold them together. We launched this company with a simple mission; to provide large diameter high quality fasteners with a great customer experience. We stand behind our products with integrity, knowledge and confidence and we stand behind our service with a commitment to you. If for any reason you aren't smiling when dealing with BigBolts.com, let us know.

y y