How do I make the script work with specific parts only?

I need to make it so that it will only work if it has a specific name.

local player = game.Players.LocalPlayer
player.CharacterAdded:wait()
local character = player.Character
local torso = character:WaitForChild("Torso")
local mouse = player:GetMouse()
local humanoid = character:WaitForChild("Humanoid")

local lastwall = nil
mouse.KeyDown:connect(function(key)
	if string.byte(key) == 48 then
	local ray = Ray.new(
		torso.CFrame.p, torso.CFrame.lookVector * 3
	)
	local hit, position, normal = workspace:FindPartOnRay(ray, character)

if hit then
	if hit ~= lastwall then
		local velo = Instance.new("BodyVelocity",torso)
		velo.MaxForce = Vector3.new(300000,300000,300000)
		velo.Velocity =  -torso.CFrame.lookVector*40 + Vector3.new(0,50,0)
		game.Debris:AddItem(velo,0.1)
		lastwall = hit
		wait(.5)
		lastwall = nil
		end
	end
end
end)

So if I was doing this with a lot of parts, and needed one of the same name, I would do something like this.

for i,v in pairs(parts parent:GetChildren()) do
    if v.Name == "PartName" then
        -- yes
    end
end

If you wanted to do anything with the part, use v instead of the route.