Hammar M1A1 Operating Head - 2029 Expiry!

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£32.99 inc VAT

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This replacement operating head will fit all automatic jackets that use the hammar M1A1 (hydrostatic) automatic inflator. (Sometimes mis-spelt as Hammer.)

The kit includes a replacement Hammar hydrostatic head, this part is used for replacing date expired operating heads. See video for fitting instructions.

These parts have a sell by / use by date - ours are guaranteed to be the freshest stock available in the UK. If you are unsure which rearming kit your lifejacket accepts please email us before ordering!

Customer Reviews

By Richard on 22nd November 2023
"This supplier had in stock lifejacket equipment no longer made by the manufacturer, and difficult to find with a full 5 year operating life. It was economical, promptly delivered and in good condition."
Star Rating 5
By Richard on 6th June 2022
"Good product delivered in a timely manner"
Star Rating 5
By Dai on 20th July 2021
"All working as expected for a well established product. Delivered on time from Marine Warehouse."
Star Rating 5
By Kenneth McVicar on 28th June 2021
"First class service on required essential safety equipment spare. Long period of validity before renewal and maintaining the integrity of our LSA for a few years to come. Dispatched very quickly after order submitted. "
Star Rating 5
By James Thorp on 8th May 2021
"The Hammar M1A1 head has given my old (but hardly worn and never used) Crewsaver jacket a new lease of life. Simple to fit and pressure test."
Star Rating 5
By Chris Wilson on 29th June 2020
"All arrived promptly in good order. Thankyou. "
Star Rating 5
By John Sells on 28th November 2019
"Genuine product with use by date of 2025. Easy ordering arrived promptly ."
Star Rating 5
By Adrian Nursey on 10th September 2019
"Excellent service. Part supplied fitted with no difficulty at all"
Star Rating 5
By Martyn Crawshaw on 21st August 2019
"Brilliant service with next day tracked delivery. Best price on internet. This years stock hence maximum usable duration."
Star Rating 5
By Robert on 3rd February 2019
"Good price and speedy delivery. Will buy again when needed."
Star Rating 5
By Christopher Hammond on 4th May 2018
"Exactly as described"
Star Rating 5
By Mark on 6th April 2018
"Long shelf life as promised, easy to fit as the kit comes with all necessary tools and clear instructions. Excellent service, dispatched almost immediately and arrived the next day "
Star Rating 5
By A Scutt on 9th August 2017
"Excellent service "
Star Rating 5
By Trish Bromley on 14th September 2016
"Good website, good products."
Star Rating 4
By Diane on 16th June 2016
"just what we needed and arrived prompty"
Star Rating 5
By Crispin on 1st June 2015
"Good date,easy replacement with key,second replacement head on this life jacket. Quick next day postal delivery."
Star Rating 5
By Mike Smith on 29th April 2015
"Good service and price from this supplier. Items easy to fit and came with helpful instructions and tool."
Star Rating 5
By Taeke on 24th September 2013
"perfect advice, super fast shipping for free."
Star Rating 5
By Jimmy Norquoy on 18th June 2013
"First class service"
Star Rating 5
By ian on 1st May 2013
"ordered one day arrived the next super quick service"
Star Rating 5
By Colin Merry on 5th December 2012
"The unit is simplicity itself to fit. One twist with the supplied key and the head separates from the cylinder pin mechanism. It really couldn't be easier. I also like the visual aid (green indicator) in determining whether the unit is good. All in all an excellent product."
Star Rating 5
By Martyn on 25th October 2012
"First class service, next day courier for free!!"
Star Rating 5
By Sancho on 2nd August 2012
"This shows real exprtise. Thanks for the answer."
Star Rating 3