Imperial Crownserts Threaded Inserts
Inch-size swaged threaded inserts for reinforced internal threads in lightweight structures.
Imperial Crownserts® are inch-size swaged threaded inserts for reinforced internal threads in lightweight structures. The imperial range is grouped into short, long, standard and heavy-duty series, with locking and non-locking variants grouped inside the same family where applicable.
Choose the correct imperial series by insert length, thread engagement, strength requirement and the matching Crownserts® tooling needed for controlled installation.

Imperial Crownserts Series
Locking and non-locking part numbers are grouped together inside the same Crownserts series.
CSS Series
The CSS Series covers short imperial Crownserts for compact inch-size installations. Locking and SP variants can be managed within this same short-series family.
- Short imperial Crownserts
- Locking options where available
- Matched installation tooling
CSS Short
CSX Series
The CSX Series covers long imperial Crownserts with increased insert length for stronger thread engagement in inch-size applications.
- Long imperial Crownserts
- Locking options where available
- Matched installation dimensions
CSX Long
CS Series
The CS Series covers miniature, structural and large imperial Crownserts. CSL part numbers are the locking variants within the same standard imperial family.
- Miniature, structural and large inserts
- CS: standard non-locking options
- CSL: locking options
CS CSL
CSH Series
The CSH Series covers heavy-duty imperial Crownserts. CSHL part numbers are the locking variants within the same heavy-duty imperial family.
- Miniature, structural and large heavy-duty inserts
- CSH: standard heavy-duty options
- CSHL: locking heavy-duty options
CSH CSHL
Imperial Crownserts Selection
Imperial Crownserts include inch-size options for miniature, structural, locking, large and heavy-duty applications.
Grouping locking and non-locking variants inside the same series makes it easier to browse by product family first, then choose the correct insert type.
Standard Series
CSS, CSX and CS imperial Crownserts for common inch-size insert applications.
Heavy-Duty Series
CSH imperial Crownserts for stronger heavy-duty thread reinforcement.
Locking Options
CSL and CSHL variants are grouped with their parent series.
Matched Tools
Use the recommended step drills, taps and installation tools per part number.
Imperial Crownserts FAQ
Quick answers about imperial Crownserts series and locking variants.
Are CS and CSL the same series?
Yes. CS is the standard imperial Crownserts family, and CSL part numbers are locking variants within the same family.
Are CSH and CSHL the same series?
Yes. CSH is the heavy-duty imperial Crownserts family, and CSHL part numbers are locking variants within the same family.
How should I choose between CSS, CSX, CS and CSH?
Choose CSS for short imperial inserts, CSX for long imperial inserts, CS for standard imperial inserts, and CSH for heavy-duty imperial inserts.
Need Help Selecting an Imperial Crownsert?
Share your thread size, insert type and application requirements, and we will help select the correct imperial Crownsert® and tooling.