I keep 2D cell Maglites in each vehicle as the switches and contacts don't seem to oxidize and result in flickering like they do on lots of other lights. I've carried two AAA Maglites in a pouch for years as a light source in my backpack when I need something more than my Photon light (another great US product), as it's just slightly more weight to carry another flashlight than extra batteries. In each glove compartment I have either the two AAA Maglites in a pouch, or recently the AA Maglites with an LED bulb.
We've had US cast iron frying pans for years, mainly Lodge, and have recently started using a Lodge dutch oven and pizza pan. Lodge is another great US product.
I don't know where they're made now but Coleman fuel and propane stoves are nice products for car camping, as are the lanterns. For lots of light it's hard to beat a Coleman lantern.
I have an Eddie Bauer made in the US down jacket which is nice, but they aren't made here anymore. I also have an older Woolrich made in the US Goretex / Thinsulate jacket, but they aren't made here anymore either. I've worn Pendleton shirts and sweaters since I was a teen, but they aren't made in the US anymore either so I treasure the older ones that I have.
In my 'man purse' I also have an original Leatherman, which is another great US product, but not all of them seem to made in the US anymore. In my truck I carry a small SOG multiplier, also made in the US. I do like the Swisstool, not to take anything away from Victorinix.
In my pack I also have a Benchmade folder with a blade of M2 steel. Benchmade is another great US product but not all of their is being made in the US. I have a Bark River knife of A2 steel, an excellent US product, my one blade that I would want with me if I were dropped into any situation anywhere. My dad gave me a Dozier skinner in D2 steel, another superb US product. I also like Cold Steel Carbon V knives, but Camillus went out of business recently. I like Schrade carbon steel Old Timers, but they went out of business when they couldn't handle a large Walmart product return. I like Case carbon steel folders, and carry an old Boker carbon steel stockman as a pocketknife. The Russell Green River carbon tseel kitchen knives that I have are like razors, trimming fat better than other kitchen knives. My son like an old thin blade carbon steel Dexter chef's knife that I found in an antique store, as the thin. sharp blade chops very well. I have what may be a life long supply of Xacto blades that I bought 30 years ago, I just sharpen the ones I have, which is another great US product that I suspct isn't US anymore.
Craftsman and SnapOn hand tools, Milwaukee and Skill corded drills (I have a 4000 rpm 1/4 Makita that like a lot), Vaughn / Stanly hammers, etc., I have lots of US tools, many of which aren't made here anymore.
Canadian Polartec is great, not US but at least North American. The great thing about the original Polartec is that it breathes well, the bad thing for some is that it breathes well :^), but I like it best for a synthetic layer. US made ECWS layers are also great, as are a variety of US made wool socks. I like US oiled cotton hats in the rain, I have a Mcalister, but also like real English and Aussie waxed cotton gear. I used a Barbour suit for years when riding in the rain on a bike.
HP RPN calculators are great, and am still using an HP41 that is probably 20 years old now. I have an HP analog scope that is over 30 years old, which will be hard to replace when it dies.
I like Sierra HPBT match bullets, and would buy seconds when the factory was still in the LA area. I probably have enough to last my life, unless commie paratroopers start dropping ..... oh wait, cold war is over :^) Federal 210M benchrest primers are another standard of sorts for high quality 30 cal ammo, another great US product. Winchester M70 and M52 rifles are a great US product, but they don't make them anymore. S&W .22 match pistols and their revolvers are great, and I like Ruger too. The Remington 870 and 1100 are kind of a 'working' standard for shotguns, and are other favorites.