This R1021,27 Plate Locking Knob from Manfrotto is included with the MVH502AH and MVH502A video heads. It is sold here as a spare or replacement part.
UPC: 719821351009
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Manfrotto R1021,27 Overview
Manfrotto R1021,27 Reviews
Works As Expected
By Jordan
Rated 4 out of 5
Date: 2024-07-29
I appreciate that these locking knobs come in a set in case others are lost or break. They are durable and high quality. My only negative note would be that these are pretty expensive for how small these items are.
Manfrotto 502 MVH502ah PERFECT Replacement Part x5
By Jonathan
Rated 5 out of 5
Date: 2021-05-11
I purchased this item even with concerns over if I would be buying 1 item or 5x the same. It came with 5, a fantastic deal compared to others I could find on the internet. The threads match perfectly, the bolts looked way too long but I had never fully backed my previous locking bolt out of the head. Again, I was wrong, this is a perfect match for my above listed head. It's a package of 5 perfect matches for your plate locking levers. Happy customer.
See any errors on this page?
Would this work with the 504HD head?
Would this work with the 504HD head?
It is possible but the correct screw is listed below;
https://bhpho.to/3ihe3xl
Date published: 2020-09-30
Is this compatible with the 504x head?
Is this compatible with the 504x head?
Manfrotto R1021,27 Plate Locking Knob for MVH502AH and MVH502A Video Heads is incompatible with the Manfrotto 504X Fluid Video Head with Flat Base.
Date published: 2025-08-20
question
Does this have the ratcheting feature for wide bodies like DSLRs? I got a used 502AH head and the knob on it doesn't ratchet like I've seen it described in reviews.
That is just a screw with a plastic head that makes it easier to tighten it.
Date published: 2018-08-26