I founds this kit of parts very useful, but after reading a review of RTL's non-metric assortment, I was able to put together my own (metric) collection for about $70, from http://www.trimcraftaviationrc.com. I got sizes from M2 to M4, with a variety of ends and lengths. I also combined it with a set from Harbor Freight that had a storage box and large sizes - M5 and up.
Trimcraft charges only $3 for any amount of shipping, and for small amounts they send it First Class mail.
A few comments, wherever you source from. Others with more building experience than I have can probably do better.

• The metric numbering system is even better than you suggest. Mn means diameter is n millimeters. So an M3x8 weighs and has strength roughly 2.25x an M2 x 8. (3 squared = 9; 2 squared = 4)
• I should have gotten a few M1.5s (1.5 mm)
• I got both Phillips head bolts, and Socket head cap. Phillips are easier to use, but for some reason I feel more secure with the socket head. There are various other kinds of heads available.
• It's more useful to get a wide range of lengths than to get every possible length in a range. Usually you can make something fit if it's a few mm too long, but if you need 30mm and you only have 25, you are out of luck!
• I should even have gotten some Phillips M4 x 40 and possibly M4 x 50. I was trying to use plywood on the inside of a fuse to brace something fastened to the outside.
• Keep the parts in the bags and cut a hole in the corner.
• I followed RTL's list and got some non-metric screws such as Servo Mounting Screws #2x7/16" . For some reason it's harder to find metric screws than bolts. The screws are very useful e.g. for cowl mounting.

I have been tempted to get something like this, and foolishly do not.

Still have a hard time justifying it, even though I know it will save time and money in the long run.

i bought all metric and standard sets. I have wanted to for a long time finally broke down and got them. It is nice.

You will be surprised at how many times you will 'find' just what you need in those assortments!

I just purchased this kit + the metric grub screw assortment. I agree with their avoidance of a 4 for a buck pack. I recently spent $13 for little M2.5 12 screws, washers, and nuts at the hardware store and another $8 at the hobby store a while ago for some M2.5 socket head screws and nuts.

The initial price is steep,but I'm glad I ordered it.

20% off for the Labor Day sale also.

I just purchased the master kit and really like it. saved 40%

I just bought the master and the meteric sets. used coupon code aug55 and it still worked in sept... got 40% off I prob will never use a screw from the standard set but it will be nice if I ever will need one... with my luck I bought 200. worth of screws and the first time I need one it wont be in the kits!! LOL

I broke down and bought this and another kit.

On the off chance that RTL is monitoring this thread, may I suggest something that would be easy for you to do but very useful for your customers?

1. Get some small avery labels, preferably clear, and print the parts on the labels. Just send the labels with the order. The customers can put them on the storage bins after they organize them.

2. Regarding blind nuts--they only come for the M3 and M4 hardware, and there is only 8. Would be nice if there were more.

3. Should include more #2 hex screws. I love those things (and bought 100 from a different vendor for $5). You should include more in the kit.

Great job otherwise. Probably a little expensive, but cheaper than running to the LHS everytime I need some thing or other.

Originally Posted by LoneWolfRC

I broke down and bought this and another kit.

1. Get some small avery labels, preferably clear, and print the parts on the labels. Just send the labels with the order. The customers can put them on the storage bins after they organize them.

2. Regarding blind nuts--they only come for the M3 and M4 hardware, and there is only 8. Would be nice if there were more.
.

I still recommend Trimcraft, both for making up an entire kit, and filling in missing items. They have blind nuts in M3, M4, M5, M6. Price depends on size, but a few dollars for a pack. http://www.trimcraftaviationrc.com/i...ts&_a=category

Labels with actual full-sized parts diagrams/photos on them is a great idea. Some people have the name, but nobody has done pictures.

I just placed a $150.00 order, saved $60.00 with code AUG55 plus free shipping

Screws have sharp points and threads as well as durable accurate heads. I love this company and its products. I use them to repair expensive equip and cabinetry, they are usually a noticeable upgrade from the fasteners installed as original manufacture. The small sizes and variety have kept me coming back repeatedly.

They work better than any fasteners I've used in decades of intricate repair and assembly. I only wish I had found them sooner.

I regretted not finding the 40% off coupon (edit: I had 'just' the 20% that could have been combined with the 40% )when I first bought the metric set in Sept, but oh well.
I have used the set several times in the past month to replace lower quality M2, 2.5, and 3 hex head bolts on helicopters. Also to replace plain M2 and 2.5 plain hex nuts with nylon lock. It's so nice to have this set. I'll order replacement hardware from RTL this year.

I got both sets and props is right, they are the best, there quality is fantastic. It is very handy when you are working on a plane and you find the hardware in the kits you get may not have that screw you need or there are no threads on the screw at all, well just open up your little handy plastic box and grab the one you need. A++++++. I was able to get the 40% and well worth it, even at full price the 40% was a added bonus that will for sure make me go back.

Can't believe I've run out of a few bolts.....so fast no less

Guess that is what happens when you build a lot !!!