Anti Tamper Nightlatch Screws Anti Tamper Nightlatch Screws NRMS have come up with a way of ensuring that when you fix a Nightlatch it cannot be removed easily. This is ideal for Blocks of flats or potential problem areas. Security Pin Headed T20 Nightlatch Screw M4 x 8mm. All Anti Tamper Screws are available in quantity’s (with discounts) of 50, 100 & 250.
