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.