The FR1NR2SB is a Floyd Rose 1000 Series locking nut in satin black hardened steel. It clamps the strings at the headstock end of the nut slot, which is what allows the bridge to float freely without the strings drifting sharp or flat at the headstock end. Without a functioning locking nut, a floating tremolo system cannot hold pitch through any real use.

Before ordering, measure the nut slot width on your neck and check the fretboard radius. Floyd Rose sizes its locking nuts by width — R2, R3, R4 and so on — and the radius has to match the board, not just the slot. A nut that is too flat in radius leaves the outer strings sitting proud; one that is too narrow crowds them toward the fretboard edge. Neither buzzes any less because it is close. The R2 designation in this part number identifies the width series — measure the nut you are replacing and confirm R2 is what your neck requires before placing an order.

The nut body is hardened steel. That matters because the clamping blocks bear down on the strings under significant torque; softer metal deforms at the string contact points and loses grip over time. The satin black finish is specific to this part number — the same nut in chrome or gold carries a different SKU.

If you are not certain this is the right size for your guitar, send us the make, model and year and we will confirm before you order.