SignalTraffic Forums

Frame Assembly (4-way only):
12-24 x 5/8" round, slotted, machine, zinc (8 per section)

Hanger (4 hole D/DT):
Wire entrance cap:
8-32 x 1" round, slotted, machine, brass (2 per hanger)
Set screw:
1/4-20 x 1/2" square head set screw, cup point, steel (1 per hanger)

Weather Plug:
1/4-20 x 1" round, slotted, machine, zinc
1/4" split-lock washer, zinc

Tie-Rods (hardware):
3/8" split-lock washer, zinc (2 per tie-rod)
3/8-16 acorn nut, hex, aluminum or brass (2 per tie-rod)

Tie-Rod Lengths (types D and DT):
One-way, single face:
1 section: 11 7/8"
2 section: 21 7/8"
3 section: 31 7/8"
4 section: 41 7/8"
5 section: 52"

Four-way, non-adjustable (without baselight):
1 section: 15"
2 section: 25 7/8"
3 section: 36 3/4"
4 section: 47 5/8"
5 section: 58 1/2"

Tie-Rod Diameter:
5/16" or 3/8", all have 3/8" thread

4-Way Terminal Block (type DT):
Terminal screws:
8-32 x 3/8" pan head, slotted, machine, brass and/or steel (up to 28)
#8 external tooth, lock washer, zinc (up to 28)
#8 thin, flat washer, brass and/or steel (up to 28)

Mounting screws (terminal block to bracket):
8-32 x 1" round, slotted, machine, brass (2) ???
May not be correct, but threads are 8-32.

Mounting screws (bracket to top plate):
8-32 x 3/8" pan head, slotted, machine, steel (2)
#8 external tooth, lock washer, zinc (2)
#8 thin, flat washer, steel (2)

Single-Face Terminal Block (type DT):
Terminal screws:
12-24 x 5/16" binding, slotted, machine, brass and/or steel (up to 12)
Mounting screws:
8-32 x 1" round, slotted, machine, brass (2)

Type DT Reflectors:
Hinge rods:
1/8" x 6 1/2" round bar, steel (1 per reflector)
Ends are slightly tapered to allow easy insertion into mount.

Reflector frames:
Front (by lens): 6-32 x 3/8" round, slotted, machine, zinc (4 per reflector)
Rear (by socket): 6-32 x 1/2" round, slotted, machine, zinc (1 per reflector)

Type D Reflectors:
Reflector frames:
Front (by lens):
8-32 x 5/16" pan head, slotted, machine, brass (3 per reflector)
#8 external tooth, lock washer, zinc (3 per reflector)

Rear (by socket):
10-32 x 1 1/4" round, slotted, machine, brass (1 per reflector)
#10 split-lock washer, zinc (1 per reflector)

Sockets (rebuildable type):
6-32 x 5/16" round, slotted, machine, brass (1 per socket)
6-32 x 7/16" round, slotted, machine, brass (1 per socket)

Door Assembly (types D/DT):
Door/hinge screws:
10-32 x 3/8" flat, slotted, machine, brass or steel
single-faces: (10 per section)
fixed 4-ways: (16 per section)

Note: some signals (usually D's and some earlier DT's) use this same screw, but they have an undercut. Mcmaster-Carr only has the undercut ones in 5/16" lengths, but they will work. Zinc plated undercut ones are still out there in the proper length, but they are very hard to find in small quanities.

Lens tabs (most DT's):
8-32 x 5/16" pan head, slotted, machine, zinc (4 per lens)
#8 external tooth, lock washer, zinc (4 per lens)

Visor screws (if equipped):
8-32 x 1/4" pan head, slotted, machine, zinc (4 per visor)

Door Latches:
1/4-20 hex nut, zinc (1 per latch)
1/4" split-lock washer, zinc (1 per latch)
3/8" ( I.D.) thin, flat washer, zinc (around 7 are used for shimming earlier, shorter style latches only)

This is for everyone that was asking for a CH hardware list, with the proper screw sizes and locations. This isn't a complete list, but it should cover the majority of CH signals (DT especially). If you have any additions, or corrections, please post them.

Note: not all type D hardware is listed.

That must have taken a amazing amount of work Jason! After any correction/additions have come in, I would like to put that in the archive so it won't get lost.

Vaughn

Great Work Jason!

I wish I had this list when I restored my signals!

I had several lists saved on my computer, and a lot of screw bags with all of the sizes marked on them from the last deco I restored, so it didn't really take that long to do. I just thought I would put them all together, because I got tired of trying to remember what went where.

It's nice to see all of that information assembled in one place and so neatly formatted. Great work! I wish this resource had existed when I restored my DT 4-way. I have no doubt this will be helpful to many people's future restoration projects.

(On the other hand, I have to admit that I had a lot of fun hunting on my own for a lot of this information a piece at a time. There can be a sort of zen to bringing a screw to home depot and holding it up alongside every piece of hardware that they sell trying to find a match. )

Ryan K

really nice work Jason thanks for posting

There can be a sort of zen to bringing a screw to home depot and holding it up alongside every piece of hardware that they sell trying to find a match.

Sounds like a good way to get a headache to me!

Sounds like a good way to get a headache to me!

I now own a screw & bolt gauge.

As I was one of those people pestering some folks here to get this list created - I just had to weigh in to say THANK YOU!! This list will be a great help to just about everyone here at some point or another.

I'm just a beginner currently working on only my 1st and 2nd restoration projects. Everyone here has been so eager to help, generous with knowledge and patient. I only hope that someday I can pass it on to someone else here who is just beginning in the hobby.