How to Calculate Thread Length on a Bolt
At Arun Fasteners we are often asked about the thread length on differing size Hex Head Bolts. Below is a helpful guide. NOTE: It is
New stock
In 2021 we were lucky enough to purchase 8 tonnes of British steel fasteners.
Approached by a farmer’s family in Cheshire, and not being exactly sure what we were buying, we are delighted with our new treasure trove!
Consisting of UNC, UNF, Whitworth, BSF and Metric, in a complete variety of bolts and nuts.
We are still sifting and cataloguing it all, but we do know that the vast majority originated from the Alvis Military Factory in Coventry.
We are delighted to have saved these high quality British fasteners from the scrap man. Our hope is they will fulfil their purpose and be used in restoration projects worldwide.
A little history of Alvis
Originally a stationary engine factory, by the end of the 1920s they had progressed to sports cars winning at Les Mans.
On November 14th 1940 the car factory was severely damaged by the German Luftwaffe’s raid on Coventry although the armaments factory was relatively undamaged. Car production was suspended for the duration of the war only resuming during the latter part of 1946. But Alvis carried out war production on aero engines and other aircraft equipment.
Alvis designed a series of six-wheel drive vehicles. The Saladin (FV601) armoured car and Saracen armoured personal carrier were first. The Salamander was an airfield crash tender. It was subsequently used as a basis for Stalwart amphibious military truck. The FV611 model was also built to serve as an armoured ambulance.
The Combat Vehicle Reconnaissance (Tracked) family of tracked vehicles were designed in the 1960s. The family includes FV101 Scorpion, FV102 Striker, FV103 Spartan, FV104 Samaritan, FV105 Sultan, FV106 Samson, FV107 Scimitar, FV4333 Stormer and the Streaker.
AVF Society
Established in 2005, the Alvis Fighting Vehicle Society is the largest collection of Post War tanks and fighting vehicles in the UK. These vehicles are privately owned or part of collections. The society functions to pool and share its resources, for the purpose of Restoration, Preservation and Education.
At Arun Fasteners we are often asked about the thread length on differing size Hex Head Bolts. Below is a helpful guide. NOTE: It is
New stock In 2021 we were lucky enough to purchase 8 tonnes of British steel fasteners. Approached by a farmer’s family in Cheshire, and
With another batch of Whitworth nuts despatched to a vintage locomotive restoration charity, we thought we would look into the history behind the thread within
We are often asked what size hex Allen key wrench will fit a certain socket screw. Below is a conversion chart to help: Metric Socket
Most metric High Tensile (HT) nuts and bolts are produced in three grades, with the exception of mild steel. Mild steel Grade 4.8 is the
