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Tunematics

BK-4

BK-4

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BK-4
BK-4
BK-4 drawing

Description

BK-4 is a Tune-o-matic and stopbar set with 10.0 mm bridge spacing (50.2 mm spread), R300.7 radius, and M5 bridge posts.

Bridge specs

  • String count 6-string
  • String spacing 10 mm (0.394 in)
  • String spread 50.2 mm (1.976 in)
  • Plate width 84.6 mm (3.331 in)
  • Plate depth 17 mm (0.669 in)
  • Mount pattern Radius R300.7 (~12 in); M5 thumbwheel post
  • Post spacing 74.4 mm (2.929 in)

Tailpiece specs

  • Plate width 100.3 mm (3.949 in)
  • Plate depth 17 mm (0.669 in)
  • Mount hole spacing 81.3 mm (3.201 in)

Hardware

  • Adjustment Height and intonation screws
  • Finish More colors — see matching swatches

Features

  • 12 in radius bridge
  • Notched saddle bridge

About measurements

String spacing

10 mm (0.394 in)

Center-to-center distance between adjacent strings at the bridge.

Mount hole spacing

Radius R300.7 (~12 in); M5 thumbwheel post

Center-to-center distance between mounting holes on the bridge plate.