This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+2334 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
In machining, a counterbore (symbol: ⌴) is a cylindrical flat-bottomed hole that enlarges another coaxial hole, or the tool used to create that feature. A counterbore hole is typically used when a fastener, such as a socket head cap screw or fillister head screw, is required to sit flush with or below the level of a workpiece's surface.
Whereas a counterbore is a flat-bottomed enlargement of a smaller coaxial hole, a countersink is a conical enlargement of such. A spotface often takes the form of a very shallow counterbore.
As mentioned above, the cutters that produce counterbores are often also called counterbores; sometimes, to avoid ambiguity, the term counterbore cutter is used instead.
The symbol is Unicode character U+2334⌴COUNTERBORE.
Representations
System
Representation (click value to copy)
Nº
9012
UTF-8
E2 8C B4
UTF-16
23 34
UTF-32
00 00 23 34
URL-Quoted
%E2%8C%B4
HTML hex reference
⌴
Wrong windows-1252 Mojibake
⌴
Encoding: GB18030 (hex bytes)
81 36 EC 36
RFC 5137
\u'2334'
Bash and Zsh inside echo -e
\u2334
C and C++
\u2334
C#
\u2334
CSS
\002334
Excel
=UNICHAR(9012)
Go
\u2334
JavaScript
\u2334
Modern JavaScript since ES6
\u{2334}
JSON
\u2334
Java
\u2334
Lua
\u{2334}
Matlab
char(9012)
Perl
"\x{2334}"
PHP
\u{2334}
PostgreSQL
U&'\2334'
PowerShell
`u{2334}
Python
\u2334
Ruby
\u{2334}
Rust
\u{2334}
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