M4 M3 Connecting Screws with Sleeves, also known as Back to Back or Male to Female Screws are recommended to secure internal door handles, doorknobs, roses and escutcheons, as screws that cannot allow the handle to be pulled through. 

Specifications:

M4 (4mm) Chrome, 60mm bolt length, 20mm sleeve length. Snap-off adjustable length 

M4 (4mm) Brass, 60mm bolt  length, 20mm sleeve length. Snap-off adjustable length

M4 Screw and Sleeve have Phillips heads with 7mm overall outer diameter. 

Snap-off adjustable length to 55mm / 50mm / 45mm / 40mm / 35mm. 

M4 screws will suit doors of 35mm - 65mm thickness. Sleeve and Screw together are around 65mm based on the tightening force.

 

M3 Silver / Chrome, 50mm length, with 20mm sleeve length. Full thread screws, easy adjustable to the right length with the right tools. 

M3 Screw and Sleeve have Slotted heads with sleeve 4.9mm overall outer diameter and 5.5mm screw head overall outer diameter.

M3 screws will suit doors of 35mm - 55mm thickness. Sleeve and Screw together are around 55mm -65mm based on the tightening force.

 

NOTES:  Adjustable to the right length with the right tools. Recommended for internal doors and NOT external doors, due to them not being security screws.

Pictures are for illustrative purposes.  

Please allow 0.5mm measurement discrepancies. Dimensions are subject to manufacturer specifications tolerance. 

 

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*Same working day dispatched by Royal Mail. (For orders placed by 4pm)

Royal Mail 2nd class in the UK is normally delivered within 2 to 3 working days but can take up to 10 working days from the dispatch date. (International standard delivery takes 5 to 7 working days but can take up to 21 days)

Note: Where a multi-buy from FixitFlo is placed 1st Class Services are mostly provided (not in conjunction with other discounts / for orders less than £10) 

Where delivery details were wrongly provided, a refund or replacement will be considered void, unless the right information is amended and confirmed (by FixitFlo) before dispatch.

In some circumstances, for refunds / returns, the postage costs will be supported by the buyer.

Thank you for understanding.