Ceramic Ball & Socket Fish Spine Beads

Du-Co Ceramics manufactures steatite ceramic and 96% alumina ball & socket fish spine beads designed for high-temperature electrical insulation applications. Ceramic Ball and Socket Fish Spine Beads (also called “Fish Spine Beads”), are flexible ceramic beads and feature a unique concave and convex design that allows insulated wires to bend, twist, and flex while maintaining continuous ceramic insulation. Fish spine beads are commonly used to insulate bare electrical wires in air and vacuum systems, heating elements, and other high-temperature applications requiring dependable electrical insulation.

Ceramic Ball & Socket Fish Spine Beads

Du-Co Ceramics manufactures steatite ceramic and 96% alumina ball & socket fish spine beads designed for high-temperature electrical insulation applications. These flexible ceramic beads feature a unique concave and convex design that allows insulated wires to bend, twist, and flex while maintaining continuous ceramic protection.

Fish spine beads applications are, but not limited to: Insulating bare electrical wire in air or vacuum systems and high temperature heating element wire insulation.

Applications for Ceramic Fish Spine Beads

High-temperature wire insulation
Heating element insulation
Vacuum systems
Industrial furnaces
Electrical insulation systems
Laboratory equipment
Temperature sensing applications
Specialty industrial equipment

Du-Co Ceramic Ball & Socket Fish Spine Beads are available in bulk or in 6″ and 12″ paper sleeves. For sleeved ceramic beads, insert wire through the paper tube of beads and pull string which splits and removes the paper, ceramic beads are applied in seconds.

Contact Du-Co Ceramics today for more information. Custom size ceramic ball & socket fish spine beads can be manufactured to your specification.

Click on dimension header to list by size

Part No.	OD	ID	Length	Pcs./Ft.	Pcs./Lb.
A-258	0.110	0.056	0.110	134	19740
A-259	0.125	0.056	0.125	110	11820
A-260	0.170	0.068	0.170	86	4450
A-261	0.200	0.092	0.200	70	2967
A-262	0.200	0.098	0.200	70	2900
A-264	0.260	0.116	0.260	54	1375
A-265	0.260	0.156	0.260	54	1549
A-1330	0.260	0.130	0.320	44	1400
A-266	0.330	0.124	0.330	42	588
A-385	0.375	0.250	0.375	38	400
A-267	0.400	0.156	0.400	34	360
A-268	0.400	0.180	0.400	34	378
A-269	0.440	0.180	0.440	34	263
A-519	0.440	0.250	0.440	34	280
A-408	0.500	0.218	0.500	29	173
A-270	0.540	0.200	0.540	27	154
A-304	0.540	0.355	0.540	27	165
A-682	0.875	0.500	0.875	13	100

This information is for design guidance only. Du-Co Ceramics Company will not guarantee this information as absolute values. Various geometries can affect properties.

Standard Size Alumina Beads

Part No.	OD	ID
A-6303	0.091	0.035
A-5901	0.125	0.056

Need Ceramic Fish Spine Beads for Your Application?

Du-Co Ceramics offers standard and custom ceramic ball & socket fish spine beads in steatite and 96% alumina materials. Whether you require bulk quantities, sleeved beads, or custom sizes, our team can help identify the right solution for your high-temperature electrical insulation application. Contact us today to discuss your requirements or request a quote.