50 x Rail Chair to suit 16mm (5/8" x 5/8") Flat Bottom Rail Part No: PNR-1T-D "Screw Fit Chair" – a PNP Railways original design manufactured from a strong engineering plastic. This chair will provide secure attachment for your rail to the sleeper with just two screws. This chair is specifically designed to suit 16mm (5/8" x 5/8" yard) steel or aluminium flat bottom rail. The Screw Fit Chair is versatile, suitable for use with both wooden and recycled plastic sleepers. Sold in packs of 50 If you would like the screws to go with this please click here PNR-1T-E - 3/4 x 8g Hex Washer Self Tapping Screws - Pack of 100 Other rail fixings available: PNR-3N - Screw Fit Chair for 21mm (2lb/yard) Flat Bottom Rail PNR-5B - Bar Rail Chair - for 10mm x 20mm Bar Rail.