Hi Diana, that one is the older on that we can no longer get, the ones that have superseded these have a threaded stalk with 2 rubber washers, 2 steel washers & 2 nuts and don't fit the Bakelite sleeve (looks like wood in the photo). These parts aren't for me but for work, I work for the LTF, part of DSG and we can't believe that the army binned all hard copies of the manuals when they computerised them, we have NSNs for the parts, but no illustrations of them which is why we would like an exploded diagram.