The Ford Barn - View Single Post - In search of correct Stainless Steel hardware

Karl Wescott · 06-12-2019, 10:08 AM

I had an illuminating discussion with Roy Nacewicz several months ago. He revealed that the Ford nuts, bolts, etc with a 5 digit part number (for example 20301-S2 1/4-20x3/8 hex head bolt) were standard "hardware store" items... Subject to the manufacturing culture of the time of course. Hardware with a 6 digit part number were special and Ford engineered. One would have to go to the Ford Engineering blueprint to get the correct specifications.

If I am reading my 1937 chassis part book (reprint) correctly the 18 or 48-4025 rear axle differential housing calls for a 350509-S screw, indicating a Ford Engineered item, not a standard hardware item.

06-12-2019, 10:08 AM	#8
Karl Wescott Senior Member Join Date: May 2010 Location: Oregon Posts: 1,289	Re: In search of correct Stainless Steel hardware I had an illuminating discussion with Roy Nacewicz several months ago. He revealed that the Ford nuts, bolts, etc with a 5 digit part number (for example 20301-S2 1/4-20x3/8 hex head bolt) were standard "hardware store" items... Subject to the manufacturing culture of the time of course. Hardware with a 6 digit part number were special and Ford engineered. One would have to go to the Ford Engineering blueprint to get the correct specifications. If I am reading my 1937 chassis part book (reprint) correctly the 18 or 48-4025 rear axle differential housing calls for a 350509-S screw, indicating a Ford Engineered item, not a standard hardware item.