Xem Studiomeasured geometry

Library › Fishing › Grips and butt hardware ·

CRB door-knob butt cap CRBC-20 (size 20 mm)

What are the dimensions of the CRB door-knob butt cap CRBC-20 (size 20 mm)? · Modern device · basis: Secondary source: Mud Hole Custom Tackle (CRB) (copy of the maker's figures; the maker publishes none directly)

Also called: crb crbc-20, 20mm butt cap, door knob butt cap, fishing rod butt cap size, rod butt cap 20 mm inside diameter, crb butt cap size chart, tapón de culata caña de pesca, endkappe angelrute, ponteira vara de pesca

Exact dimensions. True size, with no printing tolerance added.

length
34.29 mm
width
34.29 mm
height
41.91 mm

Notes

  • CRB's door-knob butt cap fits over a grip or butt of about 20 mm; Mud Hole publishes ID, OD and length.
  • The rounded knob profile and bore depth are not published, so only an envelope with the bore diameter can be built.
  • Retailer/brand-owner Mud Hole is the only source (secondary).
  • True size, no printing tolerance added. Only published numbers are used; anything not published is said so.
  • Secondary source: the numbers come from a retailer or magazine copy of the maker's specification.

CRB door-knob butt cap CRBC-20 size chart

dimensionvalue
Nominal size20 mm
Inside diameter20.04 mm (0.789 in)
Outside diameter34.29 mm (1.35 in)
Length41.91 mm (1.65 in)
Bore depthnot published

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Mud Hole Custom Tackle (CRB)CRB Door Knob Style Butt Caps - size chartwebPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

crb-door-knob-butt-cap-crbc-20-envelopeEnvelope Ø34.29 × 41.91 mm (bore depth and profile not published, not modelled)STEP · STL
Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.
Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=crb-door-knob-butt-cap-crbc-20

CRB door-knob butt cap CRBC-20 (size 20 mm), isometric render of a generated part
Render of crb-door-knob-butt-cap-crbc-20-envelope from the free STEP; not to scale.

Fits with

Fuji GC22 decorative graphite gimbal, isometric render of a generated part
Fuji GC22 decorative graphite gimbal26.1×26.1×59.0 mm★ 1 file
Fuji GC25 decorative graphite gimbal, isometric render of a generated part
Fuji GC25 decorative graphite gimbal30.1×30.1×75.0 mm★ 1 file
CRB door-knob butt cap CRBC-22 (size 22 mm), isometric render of a generated part
CRB door-knob butt cap CRBC-22 (size 22 mm)38.1×38.1×48.26 mm★ 1 file
CRB door-knob butt cap CRBC-25 (size 25 mm), isometric render of a generated part
CRB door-knob butt cap CRBC-25 (size 25 mm)38.1×38.1×50.8 mm★ 1 file

Questions

What fits a CRBC-20 butt cap?

A butt or grip up to 20.04 mm (0.789 in) diameter.