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IR/L-NPT : Internal NPT (National Pipe Threads) full profile laydown threading inserts. IR/L - ground periphery and rake, IRB - with a chipformer and peripherally ground, IRM - with a chipformer. Used for steam, gas and water pipes.(-)Internal NPT (National Pipe Threads) Full Profile Laydown Threading Inserts for Steam, Gas and Water Pipes(+)

Representative Image

Internal left-hand shown

Representative Image

Internal left-hand shown

Designation	IC	TPI	RE	INSL	PDY	PDX	HAND	CICT	SC	AN	CBMD	CEDC	CNC	COATP	D1	FTDZ	GRDMFG	IFS	NIS	S	S1	SSC	TCTR	THFT	TTP	ApplMat	StaSteel	CastIron	HardMa	NFMetals	SupTit	CutEdMat	Coating	GICAT	GIREM	giic	Tough ‹————› Hard Grade & Vc Click on Grade No. for Cutting Speed
06IR 27 NPT	4.00	27.0	0.04	6.88	0.6	0.6	R~	1	T~	~	Z~	3~	3~	~	~	~	IC228 ~	3~	1~	~	~	6~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiCN+TiN ~	5901382		1	IC228
08IR 18 NPT	5.00	18.0	0.06	8.24	0.6	0.8	R~	1	T~	~	Z~	3~	3~	~	~	~	IC228 ~	3~	1~	~	~	8~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5996066		2	IC228 IC908
11IL 18 NPT	6.35	18.0	0.06	11.00	0.8	1.0	L~	1	T~	~	Z~	3~	3~	~	~	~	IC908 ~	3~	1~	~	~	11~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5902862		1	IC908
11IR 18 NPT	6.35	18.0	0.06	11.00	0.8	1.0	R~	1	T~	~	Z~	3~	3~	~	~	~	IC250 ~	3~	1~	~	~	11~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5994822		2	IC250 IC908
11IRB 18 NPT	6.35	18.0	0.06	11.00	0.8	1.0	R~	1	T~	~	B~	3~	3~	~	~	~	IC908 ~	3~	1~	~	~	11~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	3303072		1	IC908
11IL 14 NPT	6.35	14.0	0.07	11.00	0.8	1.0	L~	1	T~	~	Z~	3~	3~	~	~	~	IC250 ~	3~	1~	~	~	11~	~	NPT60~	INT~	Steel~	Stainless Steel~					Carbide~	TiCN+TiN ~	5995332		1	IC250
11IR 14 NPT	6.35	14.0	0.07	11.00	0.8	1.0	R~	1	T~	~	Z~	3~	3~	~	~	~	IC1007~	3~	1~	~	~	11~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5902030		3	IC250 IC908 IC1007
16IL 27 NPT	9.52	27.0	0.05	16.49	0.7	0.8	L~	1	~	~	Z~	~	~	~	~	~	IC250 ~	~	~	~	~	~	~	NPT60~	INT~	Steel~	Stainless Steel~					Carbide~	TiCN+TiN ~	3409704		1	IC250
16IR 27 NPT	9.52	27.0	0.05	16.49	0.7	0.8	R~	1	T~	~	Z~	3~	3~	~	~	~	IC908 ~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5996115		1	IC908
16IR 18 NPT	9.52	18.0	0.06	16.49	0.8	1.0	R~	1	T~	~	Z~	3~	3~	~	~	~	IC908 ~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5902181		1	IC908
16IRM 14 NPT	9.52	14.0	0.05	16.49	0.9	1.2	R~	1	T~	~	B~	3~	3~	~	~	~	IC1007~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5921256	With pressed chipformer	4	IC250 IC808 IC908 IC1007
16IRB 14 NPT	9.52	14.0	0.07	16.49	0.9	1.2	R~	1	T~	~	B~	3~	3~	~	~	~	IC908 ~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5902601	With pressed chipformer	1	IC908
16IL 14 NPT	9.52	14.0	0.08	16.49	0.9	1.2	L~	1	T~	~	Z~	3~	3~	~	~	~	IC908 ~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5903353		1	IC908
16IR 14 NPT	9.52	14.0	0.08	16.49	0.9	1.2	R~	1	T~	~	Z~	3~	3~	~	~	~	IC1007~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5993037		4	IC228 IC250 IC908 IC1007
16IRB 11.5 NPT	9.52	11.5	0.09	16.49	1.1	1.5	R~	1	T~	~	B~	3~	3~	~	~	~	IC908 ~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5902828	With pressed chipformer	1	IC908
16IRM 11.5 NPT	9.52	11.5	0.09	16.49	1.1	1.5	R~	1	T~	~	B~	3~	3~	~	~	~	IC1007~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~	Non Ferrous Metals~	Superalloys and titanium~	Carbide~	TiAlN ~	5921242	With pressed chipformer	4	IC508 IC808 IC908 IC1007
16IL 11.5 NPT	9.52	11.5	0.09	16.49	1.1	1.5	L~	1	T~	~	Z~	3~	3~	~	~	~	IC250 ~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5990607		2	IC250 IC908
16IR 11.5 NPT	9.52	11.5	0.09	16.49	1.1	1.5	R~	1	T~	~	Z~	3~	3~	~	~	~	IC1007~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5901939		3	IC50M IC908 IC1007
16IRM 8 NPT	9.52	8.0	0.12	16.49	1.3	1.8	R~	1	T~	~	B~	3~	3~	~	~	~	IC1007~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5903459	With pressed chipformer	3	IC808 IC908 IC1007
16IRB 8 NPT	9.52	8.0	0.11	16.49	1.2	1.7	R~	1	T~	~	B~	3~	3~	~	~	~	IC908 ~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5902827	With pressed chipformer	1	IC908
16IL 8 NPT	9.52	8.0	0.11	16.49	1.3	1.8	L~	1	T~	~	Z~	3~	3~	~	~	~	IC250 ~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5903351		2	IC250 IC908
16IR 8 NPT	9.52	8.0	0.11	16.49	1.2	1.7	R~	1	T~	~	Z~	3~	3~	~	~	~	IC08 ~	3~	1~	~	~	16~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~	Non Ferrous Metals~	Superalloys and titanium~	Carbide~	TiAlN ~	5901938		3	IC250 IC08 IC908
22IR 11.5 NPT 2M	12.70	11.5	0.09	22.00	2.3	3.5	R~	2	T~	~	Z~	3~	3~	~	~	~	IC908 ~	3~	1~	~	~	22~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5902445	Multi-tooth	1	IC908
27IR 11.5 NPT 3M	15.88	11.5	0.09	27.50	3.3	5.5	R~	3	T~	~	Z~	3~	3~	~	~	~	IC908 ~	3~	1~	~	~	27~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5902444	Multi-tooth	1	IC908
27IR 8 NPT 2M	15.88	8.0	0.12	27.50	3.1	5.0	R~	2	T~	~	Z~	3~	3~	~	~	~	IC908 ~	3~	1~	~	~	27~	~	NPT60~	INT~	Steel~	Stainless Steel~	Cast Iron~	Hard Materials~		Superalloys and titanium~	Carbide~	TiAlN ~	5902448	Multi-tooth	1	IC908

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National Pipe Threads ANSI/ASME B1.20.1-1983

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Threading
Main Application

Internal Threading lay down
Sub Application