Thanks for your review. Glad to hear that our stainless steel linch pins got your going again with your launching trolley. I hope we can be of help again some time soon.

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The external thread will self-cut into a pre-prepared hole in a similar way a wood screw does providing a metric thread.

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The head of the insert is shaped to sit fully flush once correctly inserted in order that it blends in with the existing area. Below the head is a recess to provide a space for sealant to squeeze into when a watertight fit is required, please see our separate guide below on installation procedure:

Self-tapping threaded inserts are a useful way to achieve a strong, permanent metric thread in soft materials such as fibreglass or wood – ideal for many situations on boats and yachts where often, only single-sided access is available. ​

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Many thanks for taking the time to leave this review. Glad to hear you are happy with our service. I hope we can be of help again some time soon.

Blind self-tapping inserts can be used in applications where any fluid ingression along the internal thread could be an issue.​

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Thanks very much for leaving this review. We are glad to hear that you are happy with the stainless steel flange mount.

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For installation, a suitably sized hole is drilled into the wood or fibre-glass (more details provided in our installation guide).  The insert is then screwed into the hole, self-tapping its own thread.  When installing these 316 stainless inserts in fibre-glass the size of the pilot hole can be quite critical, and it is desirable to test first on an unimportant area of scrap piece of material.

Many thanks for taking the time to leave this review. I am glad to hear that you were happy with our buying process, and the value of our stainless steel shackles.

Self-tapping threaded inserts are a useful way to achieve a strong, permanent metric thread in soft materials such as fibreglass or wood – ideal for many situations on boats and yachts where often, only single-sided access is available. ​ For installation, a suitably sized hole is drilled into the wood or fibre-glass (more details provided in our installation guide).  The insert is then screwed into the hole, self-tapping its own thread.  When installing these 316 stainless inserts in fibre-glass the size of the pilot hole can be quite critical, and it is desirable to test first on an unimportant area of scrap piece of material. The external thread will self-cut into a pre-prepared hole in a similar way a wood screw does providing a metric thread. Blind self-tapping inserts can be used in applications where any fluid ingression along the internal thread could be an issue.​ The head of the insert is shaped to sit fully flush once correctly inserted in order that it blends in with the existing area. Below the head is a recess to provide a space for sealant to squeeze into when a watertight fit is required, please see our separate guide below on installation procedure: Installation guide Choice of sizes Solid 316 stainless steel construction Provides strong permanent metric thread Suitable for marine environments Manufactured in the UK

Delighted to find that Boat Fittings were able to supply the small gauge / short length I needed for a classic boat renovation project. My local supplier stocks only larger gauges and lengths. The screws that Boat Fittings supplied were perfect for the job.