Thermocouple Wire Part Numbering System

Example Thermocouple Wire Part Number: K24-1-305

Thermocouple Wire Part Numbering System
Type of Wire
J
K
T
E
Wire Gauge
16-40 AWG¹
Calibration Designation
0	Thermocouple Grade, Solid, Single Leg
1	Thermocouple Grade, Solid, Standard Limits
2	Thermocouple Grade, Solid, Special Limits
3	Thermocouple Grade, Stranded, Standard Limits
4	Thermocouple Grade, Stranded, Special Limits
5	Extension Grade, Solid, Standard Limits
6	Extension Grade, Solid, Special Limits
7	Extension. Grade, Stranded, Standard Limits
8	Extension Grade, Stranded, Special Limits
9	Thermocouple Grade, Stranded, Single Leg
Insulation Type
(See below table)

¹Special sizes available upon request

		Temperature Ratings				Physical Properties
Part #	Type of Insulation	Max Continuous Temp.		Max Instantaneous Temp.		Abrasion Resistance	Moisture Resistance	Chemical Resistance
301	Vitreous Silica Braid / Vitreous Silica Braid	871°C	1600°F	1093°C	2000°F	* *	*	*
302	Double Glass Braid Singles / Glass Braid Duplex	482°C	900°F	538°C	1000°F	* * *	* * *	* * *
303	Enamel, Glass Braid Singles / Glass Braid Duplex	482°C	900°F	538°C	1000°F	* *	* * *	* * *
304	Standard Glass Braid Singles / Glass Braid Duplex	482°C	900°F	538°C	1000°F	* *	* * *	* * *
305	Double Glass Wrap Singles / Glass Braid Duplex	482°C	900°F	427°C	800°F	* *	* * *	* * *
306	Non Impregnated Glass Braid / Non Impregnated Glass Braid Duplex	482°C	900°F	427°C	800°F	*	*	* *
308	Double Cotton Braid Singles / Cotton Braid Duplex	88°C	190°F	120°C	248°F	* * *	* * *	*
310	Skive TFE Tape, TFE Impreg Glass Braid Singles / Fused TFE Tape Duplex	260°C	500°F	538°C	1000°F	* * *	* * * *	* * * *
311	“S” Glass No Binder	704°C	1300°F	871°C	1600°F	* *	* *	* * *
321	“S” Glass w/ Binder	704°C	1300°F	871°C	1600°F	* *	* *	* * *
350	Ceramic Fiber Braid/Ceramic Fiber Braid Duplex	1204°C	2200°F	1427°C	2600°F	* *	* *	* *
355	Ceramic Fiber Braid/Ceramic Fiber Braid Duplex Medium Build	1204°C	2200°F	1427°C	2600°F	* *	* *	* *
365	Vitreous Silica Braid / Vitreous Silica Braid Medium Build	871°C	1600°F	1093°C	2000°F	* *	*	*
501	Polyvinyl Singles / Nylon Duplex	105°C	221°F	120°C	248°F	* * * *	* * * *	* * *
502	Polyvinyl Singles / Polyvinyl Duplex	105°C	221°F	105°C	221°F	* * *	* * * *	* * *
504	Nylon Singles / Nylon Duplex	150°C	302°F	130°C	266°F	* * * *	* * *	* * *
505	PVC Single / Fused for Ripcord Duplex, No Jacket	105°C	221°F	105°C	221°F	* * *	* * * *	* * *
506	5 Mils FEP Singles / 5 Mils FEP Duplex (may vary 5-7)	204°C	400°F	260°C	500°F	* * * *	* * * *	* * * *
507	10 Mils FEP Singles / 10 Mils FEP Duplex (may vary 8-10)	204°C	400°F	260°C	500°F	* * * *	* * * *	* * * *
508	Fused TFE Tape Singles / Fused TFE Tape Duplex	260°C	500°F	316°C	600°F	* * *	* * * *	* * * *
509	FEP Singles / Twisted pair with drain wire / Alum. mylar or Polyimide / FEP Duplex	204°C	400°F	260°C	500°F	* * * *	* * * *	* * * *
510	PVC Singles / Twisted pair with drain wire / Alum. mylar / PVC Duplex	105°C	221°F	105°C	221°F	* * *	* * * *	* * *
511	Polyimide Singles / Polyimide Twisted Pair (no jacket)	260°C²	600°F	427°C	800°F	* * * *	* * * *	* * * *
512	Polyimide Singles with Tracers / Polyimide Duplex	260°C²	600°F	427°C	800°F	* * * *	* * * *	* * * *
513	Polyimide Singles / Polyimide Duplex	260°C²	600°F	427°C	800°F	* * * *	* * * *	* * * *
514	ETFE Singles / ETFE Duplex	150°C	302°F	200°C	392°F	* * * *	* * * *	* * * *
515	ETFE Singles / Twisted Pair / ETFE Duplex	150°C	302°F	200°C	392°F	* * * *	* * * *	* * * *
516	PFA Singles / PFA Duplex	260°C	500°F	290°C	550°F	* * * *	* * * *	* * * *

² Polyimide tape will withstand 316°C but the laminate FEP layer will dissolve at temperatures above 260°C

KEY
*	Poor
* *	Fair
* * *	Good
* * * *	Excellent