McMaster-Carr has a website/online store.  Just checked for your need and they have them at about $10 for a bag of 25.  I purchase from them on occasion and they are quick to ship at a reasonable rate and the price seems fair.

I would definitely try these folks   http://amkproducts.com/  ... I have, and was always pleased... except sometimes hard to come up with $30 minumum when you only need one particular clip, spring, or nic-nak.

Cheers... Brian

Cylinder Index = 84

Current Experiment = `57 Tbird, Grand Rapids, Michigan

One of our large welding shops carries bins full of black oxide bolts. However  I never checked for grades they had available.

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.

Hi,

The local hardware store carries grade 5 zinc plated bolts or cad plated bolts. I didn't think grade 5 black oxide bolts would be this challenging to locate. I guess I'll try online suppliers and see if I could purchase small quantities.

If you have a TSC, Fastenal, or Atwoods store available locally, then any of these places will carry both grades in the various sizes.

Lorena, Texas (South of Waco)

I have bolt bins at my shop and keep them supplied from these guys.
http://www.imperialsupplies.com/index.asp?loggedout

Kenneth

Fredricksburg, Texas

It is odd you cant find grade 5 locally.  Our small town of 32,000 has at least three hardware stores that carry 5's.  Then 30 miles away in Medford, there are even more outlets.

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.

Hi,

 Looking for resources to buy grade 5  3/8-16 bolts black oxide. I don't want to buy a kit for a specific engine size just looking for replacement bolts for the intake manifold and a few others. Local hardware stores don't have them so looking for suggestions.

Thanks