Rotating a locked hat?

debounce = true

function onTouched(hit)
	if (hit.Parent:findFirstChild("Humanoid") ~= nil and debounce == true) then
		debounce = false
		h = Instance.new("Hat")
		p = Instance.new("Part")
		h.Name = "Hat" 
		p.Parent = h
		p.Position = hit.Parent:findFirstChild("Head").Position
		p.Name = "Handle" 
		p.formFactor = 0
		p.Size = Vector3.new(-0,-0,-1) 
		p.BottomSurface = 0 
		p.TopSurface = 0 
		p.Locked = true 
		script.Parent.Mesh:clone().Parent = p
		h.Parent = hit.Parent
		h.AttachmentPos = Vector3.new(0,1.75,-0.7)
		wait(5)		debounce = true
	end
end

script.Parent.Touched:connect(onTouched)

This script works perfectly. It's supposed to attach a radio to your back. However, the radio is on backwards. All I need to do to rotate it is add the new rotation coordinates (0,pi/2,pi/4) to turn it around and tilt it around the z-axis. Problem is, I don't know much about CFraming and how to convert my radians into a language Lua understands. If you could tell me an example of a script telling a part to rotate, that would be great. Also, is h.AttachmentRot a thing? I would think so since AttachmentPos is mentioned in the above script.