ISO 228-1 threaded fittings

ISO 228-1 welding nipple

A connector with one threaded end and one welding end. Compare outside diameter, length and wall thickness.

Parallel threads: sealing is not made on the threads alone. Specify the joint sealing arrangement.

Technical drawing

Original illustrative drawing. Not to scale; use the documented variant dimensions for selection.

Ø (")	D (mm)	L (mm)	Wall thickness (mm)
1/8"	10.2	20	1.5
1/4"	13.7	25	2
3/8"	17.2	25	2
1/2"	21.3	30	2.5
3/4"	26.9	30	3
1"	33.7	35	3
1"1/4	42.4	38	3
1"1/2	48.3	40	3
2"	60.3	45	3.6
3"	88.9	55	4

Material and size combinations are variant-specific: use the selection table below. Other materials, grades and finishes available on request.

Open documented configurations and select for RFQ

Material	Ø (")	D (mm)	L (mm)	Wall thickness (mm)
AISI 304 / A2	1/8"	10.2	20	1.5
AISI 316 / A4	1/8"	10.2	20	1.5
AISI 304 / A2	1/4"	13.7	25	2
AISI 316 / A4	1/4"	13.7	25	2
AISI 304 / A2	3/8"	17.2	25	2
AISI 316 / A4	3/8"	17.2	25	2
AISI 304 / A2	1/2"	21.3	30	2.5
AISI 316 / A4	1/2"	21.3	30	2.5
AISI 304 / A2	3/4"	26.9	30	3
AISI 316 / A4	3/4"	26.9	30	3
AISI 304 / A2	1"	33.7	35	3
AISI 316 / A4	1"	33.7	35	3
AISI 304 / A2	1"1/4	42.4	38	3
AISI 316 / A4	1"1/4	42.4	38	3
AISI 304 / A2	1"1/2	48.3	40	3
AISI 316 / A4	1"1/2	48.3	40	3
AISI 304 / A2	2"	60.3	45	3.6
AISI 316 / A4	2"	60.3	45	3.6
AISI 304 / A2	3"	88.9	55	4
AISI 316 / A4	3"	88.9	55	4

Specify the application and required documentation. Dimensions not shown here and supply availability are confirmed for the selected configuration.

B2B / RFQ

ISO 228-1 welding nipple

An internally parallel-threaded coupling for joining two male ends. Sizes and materials are listed separately in the table.