So we bought a used Samsung dryer and upon install discovered that the screws to attach the power cord were missing. I’m having trouble finding specifics on what size screws to use. Are 10-32 screws what I’m looking for? Also, will standard zinc machine screws work or do they need to all be grounding screws?

i don't know, this link may help. please note warning that your unit must have a proper ground wire connection. be safe.
https://www.samsung.com/ca/support/home-appliances/samsung-dryer-connect-the-electrical-wiring/

If you had one of the nuts you could probably match it up otherwise it is best just to buy the KIT



If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

Go to the following website to view pictures of how to hook up your four wires to the dryer.
Please rate me

http://www.selfhelpandmore.com/switch-outlet/dryer-circuit-wiring-and-hookup.php

Try this link Replacing a dryer cord

To connect power cord:
• Remove the screws from the cover of the
junction box located at the top rear of the dryer.
• Loosen/remove the two screws on the strain
relief clamp and remove from 4-wire supply
cord.
• The strain relief splits into two indentical parts.
• Insert the large flange of both sections into the
hole located on the left side of the junction box
housing. The short flange of both sections and
screws must remain positioned on the external
side of the junction box housing.
• Insert the 4- wire supply cord through both
sections of the strain relief and re-install strain
relief screws, do not fully tighten until electrical
connections are complete.
• Attach the power cord ground conductor (green
wire) to the ground terminal marked with the
ground symbol. Tighten screw until ground
conductor is secure. (See Fig. 7)
• Attach the power cord neutral conductor (white
wire) to the neutral terminal. (marked N)
Tighten screw until neutral conductor is secure.
(See Fig. 7)
• Attach the power cord phase conductor (black
wire) to the phase terminal (marked L3).
Tighten screw until power conductor is secure.
(See Fig. 7)
• Attach the power cord phase conductor (red
wire) to the phase terminal (marked L1).
Tighten screw until power conductor is
secure.(See Fig. 7)
• Tighten the screws on the strain relief so that
the power cord cannot be moved.
• Re-install the cover of the junction box and
secure with four screws removed earlier.
• The dryer is now ready to be connected to the
power supply receptacle.

This is from the manual for the Danby DCD5505W. You did not give the model # so I went off of what you listed it under.

Good Luck and please rate 4 thumbs for the free answer.

Attach the power cord as follows:

1. Remove the cover on the terminal block on the back of the dryer.

2. Match the corresponding wire colors as follows:

a. RED - HOT (120VAC)
b. BLACK - HOT (120VAC)
c. WHITE - Neutral (0 VAC) - should have a ground strap attached, tying it equipment ground.

3. Make sure you use the power cord strain relief clamp when installing the power cord to prevent chaffing of the insulation and wire strain which can lead to broken wires.

NOTE: If the wires are not color coded, the outer two wires (left and right) are the HOT leads. The center conductor is Neutral.

For clarification purposes, the following link explains dryer power cord configurations/installation in detail:

http://www.fixya.com/support/r3575913-installing_a_220_vac_appliance_cord

If you have any questions, please post back and let me know. I hope you find this information helpful.

These two pictures illustrate the power wiring on a the terminal of an electric dryer. The one to the left here is the old-style three-wire configuration. Most people have this type in their homes. New code changes, though, require that dryers now have a four-wire cord, shown to the right. These are just just thumbnail pictures that you can click for a larger view. But I'll bet you already figured that out, didn't you?
Besides the number of wires in each cord, there are two important things to notice. First, in the four-wire configuration, notice that the dryer's grounding strap is folded back on itself. The whole point of the four-wire cord is to separate the ground from the neutral. The green wire (the "new" extra wire in the four-wire cord) is attached to the dryer cabinet. In the three-wire configuration, the grounding strap is left intact and the neutral and ground are tied together.
If you need to re-wire the outlet, these pictures will explain the anatomy of the three-prong (left) and four-prong (right) outlets. Once again, these pictures are just thumbnails--click 'em for a larger view.

Sure hope this helps you find a resolution to your delimma! Best wishes.

Comments: Jul 23, 2009-

Three wire Four wire.


Better? Best wishes and sorry about the pics. Hope this is better.

this is the rule of thumb,white always goes on the middle terminal ,the 2 outside terminal wires it does not matter which side they are on,if you can see the red and black wire on the terminal block then match them up,the green wire gets mounted to the cabinet,you should already have a green wire to the cabinet so remove the screw and put both wires there and your done,let me know how you do-mike

Remove the cover plate just above where the cord goes in (1/4" screw) Loosen all 4 screws (3 brass ones and a green one) and see if the connectors will come off. (this is for a "fork" type connector) if the connectors won't come off, you have a "loop type connector in which case you will need to remove all the screws completely. BE CAREFUL! If you drop one inside the machine, you will have to dis-assemble it. Now, re-install/ tighten down the green screw. (If the green screw wasn't used, the unit wasn't installed correctly at the time of install). Loosen the screws on the clamp where the power cord comes into the washer. (again, they may be missing do to improper install). Now, install you three prong cord in reverse. (The cords are flat so you can't mix the wires up on most models of cords) Make sure to put the clamp (strain relife) on that was supplied with your new cord.

Remove the ground strap from the middle terminal block in the dryer. Attach the white wire to this terminal. Take the green wire and attach it to the frame of the dryer. Attach the red wire to the right hand terminal, and the black wire to the left side terminal.