Tippmann 98C Screw&Nut Chart

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   Updated 6/23/04
This should be complete now. Velocity Adjustment Screw is now added. "W"
Additional Info which is located bottom of this thread.

Hopefully this helps a few of you guys.

The one on the left is a Low Head Black-Oxide Finish Screw. 
These are heat treated for strength and are the ones that comes with your Tippmann 98 Custom. 
The one on the right is an 18-8 Stainless Steel Screw and they offer excellent corrision resistance.
Notice the difference in head heights.
Low Head screws will be flush to your receivers, where as the 18-8 S.S. screws will be sticking out from your receivers a little under 1/8".
You can pick these up from your local hardware store (maybe), www.mcmaster.com, paintball stores or Tippmann themselves. Please note that you won't find these odd lengths. It's better to go long and cut to size (so that the screw thread end is flush to nut).
LOW HEAD BLACK OXIDE FINISH CHART:

Now these are the EXACT sizes that are on your Tippmann 98 Custom!
A) Low Head Socket Cap Screw, #10-32 x 1 3/32" R.H., Use 1/8" Hex Key
B) Low Head Socket Cap Screw, #10-32 x 21/32" R.H., Use 1/8" Hex Key
C) Low Head Socket Cap Screw, #10-32 x 1" R.H., Use 1/8" Hex Key
D) Button Head Hex Screw, #6-32 x 3/8" R.H., Use 3/16" Hex Key
E) Button Head Hex Screw, #10-32 x 27/32" R.H., Use 1/8" Hex Key
F) Button Head Hex Screw, #10-32 x 1 3/32" R.H., Use 1/8" Hex Key
G) "Inside Grip Panel", #10-32 Square Nut R.H.
H) 10-32 Hex Nut R.H.
I) Button Head Hex Screw, #10-32 x 1/4" R.H., Use 1/8" Hex Key
J) Button Head Hex Screw, 1/4"N.C. x 1" R.H., Use 5/16" Hex Key
K) 1/4" Standard Washer
L) 1/4" N.C. Square Nut R.H.
M) Button Head Screw, #8-32 x 1/4" R.H., Use Philips Head Screwdriver
W) 5/16"-24 x 1/2" Length Setscrew, Cup Point, Black Oxide Finish Or 18-8 S.S., Use 5/32 Hex Key
You're probably asking "Why the odd lengths?". Yeah, that's what I thought too. But let's say for the smaller receiver screws...If you use 5/8" in length, it's too short. If you use 3/4", it's too long (the threads stick out too much from the nut). Here's what I did: I bought a bunch of #10-32 x 1 1/4" and cut them to length using a boltbuster ( www.boltbuster.com ). Or you can use the bolt cutter on a wire stripper if you're manly. As for the bottom bolts that hold your tank adapter or drop forward, I recommend using a #10-32 x 1" for both. It works fine.
18-8 STAINLESS STEEL CHART
The reason why I am showing this chart is because the Hex Key (or Allen Wrench) that you use are A DIFFERENT SIZE than the one that you use on the Low Head Black Oxide Screw.
You can buy them again at a local hardware store (maybe), paintball stores, www.mcmaster.com OR through eBay. Again, buy them long and cut to size.

N) Socket Cap Screw, #10-32 x 21/32" R.H., Use 5/32" Hex Key
O) Socket Cap Screw, #10-32 x 1 3/32" R.H., Use 5/32" Hex Key 
P) Socket Cap Screw, #10-32 x 1" R.H., Use 5/32" Hex Key
Q) Button Head Screw, #6-32 x 3/8" R.H., Use Philips Screwdriver
R) "Inside Grip Panel", #10-32 Square Nut R.H.
S) Socket Cap Screw, #10-32 x 1" R.H., Use 5/32" Hex Key 
T) 10-32 Hex Nut R.H.
U) "Not Shown", Button Head Hex Screw, #10-32 x 1/4" R.H., Use 1/8" Hex Key
V) Button Head Hex Screw, #8-32 x 1/4" R.H., Use 3/32" Hex Key
W) 5/16"-24 x 1/2" Length Setscrew, Cup Point, Black Oxide Finish Or 18-8 S.S., Use 5/32 Hex Key
The 1/4" Screw, Nut & Washer on the feed elbow are the same spec's as the Black Oxide Finish.

ADDITIONAL INFO
I would like to add that the following is ALSO available:
-Low Head Black Oxide 18-8 Stainless Steel
-Standard Head Black Oxide 18-8 Stainless Steel 
But be aware, there may not be all the sizes available for you to fit your 98C if you are sticking to a certain class. For instance, I don't think you can find anything longer than 1" in a 10-32 Standard Socket Cap Screw in Black Oxide Finish 18-8 Stainless Steel (To fit for "A" or "O").

Edited by <Ridd