SR Reducers - USA SUPERLOK - Tube Fittings - Ball Valves - Pipe Fittings

SR Reducers

Reducer Fitting – SR Reducers

The Reducer Fitting is a versatile component used to connect pipes of different diameters while maintaining system integrity. Designed for high-pressure and temperature applications, this fitting minimizes turbulence and pressure loss. Made from stainless steel, it offers excellent corrosion resistance and strength. Commonly used in chemical processing, gas transmission, and hydraulic systems, reducer fittings are available in multiple sizes to meet diverse piping requirements.

Browse all Reducer Fittings below to find the right match for your fluid system.

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SKU: 17977 Category: Reducers

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Specifications

Superlok Part Type	Reducer

Available Sizes

SR-5-6 SR Reducers

SR 5/16 in. Tube Outside Diameter D x 3/8 in. Tube Stub Reducer

Dimension A	16.25mm
Dimension B	18.54mm
Dimension I	34.54mm
Dimension L	41.91mm
Dimension d1 [Min]	6.9mm
Dimension d [Min]	6.35mm

Inch/Metric	Inch
Tube Outside Diameter D	5/16in, mm
Tube Outside Diameter D1	3/8in
Width Across Flats h	9/16in, mm

Swagelok®	500-R-6
Parker (Alok)®	6TUR5
Hy-Lok®	CUR 5-6
Tylok (CBC-Lok)®	5-DRATT-6
Ham-Let (Let-Lok)®	767LT 5/16 X 3/8
Hoke (Gyrolok)®	5R6
Dk-Lok®	DR5-6
Bi-Lok (Series D)®	DRE-5-6
SSP (DUlok)®	D5R6

SR 2-1 SR Reducers

SR 1/8 in. Tube Outside Diameter D x 1/16 in. Tube Stub Reducer

Dimension A	12.70mm
Dimension B	15.24mm
Dimension I	22.35mm
Dimension L	28.95mm
Dimension d1 [Min]	0.8mm
Dimension d [Min]	2.28mm

Inch/Metric	Inch
Tube Outside Diameter D	1/8in, mm
Tube Outside Diameter D1	1/16in
Width Across Flats h	7/16in, mm

Swagelok®	200-R-1
Parker (Alok)®	1TUR2
Hy-Lok®	CUR 2-1
Tylok (CBC-Lok)®	2-DRATT-1
Ham-Let (Let-Lok)®	767LT 1/8 X 1/16
Hoke (Gyrolok)®	2R1
Dk-Lok®	DR2-1
Bi-Lok (Series D)®	DRE-2-1
SSP (DUlok)®	D2R1

SR 2-2 SR Reducers

SR 1/8 in. Tube Outside Diameter DX 1/8 in. Tube Stub Reducer

Dimension A	12.70mm
Dimension B	15.24mm
Dimension I	26.92mm
Dimension L	33.52mm
Dimension d1 [Min]	2.1mm
Dimension d [Min]	2.28mm

Inch/Metric	Inch
Tube Outside Diameter D	1/8in, mm
Tube Outside Diameter D1	1/8in
Width Across Flats h	7/16in, mm

Swagelok®	200-R-2
Parker (Alok)®	2TUR2
Hy-Lok®	CUR 2-2
Tylok (CBC-Lok)®	2-DRATT-2
Ham-Let (Let-Lok)®	767LT 1/8 X 1/8
Hoke (Gyrolok)®	2R2
Dk-Lok®	DR2-2
Bi-Lok (Series D)®	DRE-2-2
SSP (DUlok)®	D2R2

SR 2-4 SR Reducers

SR 1/8 in. Tube Outside Diameter DX 1/4 in. Tube Stub Reducer

Dimension A	12.70mm
Dimension B	15.24mm
Dimension I	29.46mm
Dimension L	36.06mm
Dimension d1 [Min]	4.4mm
Dimension d [Min]	2.28mm

Inch/Metric	Inch
Tube Outside Diameter D	1/8in, mm
Tube Outside Diameter D1	1/4in
Width Across Flats h	7/16in, mm

Swagelok®	200-R-4
Parker (Alok)®	4TUR2
Hy-Lok®	CUR 2-4
Tylok (CBC-Lok)®	2-DRATT-4
Ham-Let (Let-Lok)®	767LT 1/8 X 1/4
Hoke (Gyrolok)®	2R4
Dk-Lok®	DR2-4
Bi-Lok (Series D)®	DRE-2-4
SSP (DUlok)®	D2R4

SR 2-4-TM SR Reducers

SR 1/8 in. Tube Outside Diameter D x 1/4 in. Tube Stub Bored Through Reducer

Dimension A	12.70mm
Dimension B	15.24mm
Dimension I	29.46mm
Dimension L	36.06mm
Dimension d1 [Min]	4.4mm
Dimension d [Min]	2.28mm

Inch/Metric	Inch
Tube Outside Diameter D	1/8in, mm
Tube Outside Diameter D1	1/4in
Width Across Flats h	7/16in, mm

SR 2-6 SR Reducers

SR 1/8 in. Tube Outside Diameter DX 3/8 in. Tube Stub Reducer

Dimension A	12.70mm
Dimension B	15.24mm
Dimension I	30.98mm
Dimension L	37.59mm
Dimension d1 [Min]	6.9mm
Dimension d [Min]	2.28mm

Inch/Metric	Inch
Tube Outside Diameter D	1/8in, mm
Tube Outside Diameter D1	3/8in
Width Across Flats h	7/16in, mm

Swagelok®	200-R-6
Parker (Alok)®	6TUR2
Hy-Lok®	CUR 2-6
Tylok (CBC-Lok)®	2-DRATT-6
Ham-Let (Let-Lok)®	767LT 1/8 X 3/8
Hoke (Gyrolok)®	2R6
Dk-Lok®	DR2-6
Bi-Lok (Series D)®	DRE-2-6
SSP (DUlok)®	D2R6

SR 2-8 SR Reducers

SR 1/8 in. Tube Outside Diameter D x 1/2 in. Tube Stub Reducer

Dimension A	12.70mm
Dimension B	15.24mm
Dimension I	37.59mm
Dimension L	44.19mm
Dimension d1 [Min]	9.4mm
Dimension d [Min]	2.28mm

Inch/Metric	Inch
Tube Outside Diameter D	1/8in, mm
Tube Outside Diameter D1	1/2in
Width Across Flats h	9/16in, mm

Swagelok®	200-R-8
Parker (Alok)®	8TUR2
Hy-Lok®	CUR 2-8
Tylok (CBC-Lok)®	2-DRATT-8
Ham-Let (Let-Lok)®	767LT 1/8 X 1/2
Hoke (Gyrolok)®	2R8
Dk-Lok®	DR2-8
Bi-Lok (Series D)®	DRE-2-8
SSP (DUlok)®	D2R8

SR 4-2 SR Reducers

SR 1/4 in. Tube Outside Diameter D x 1/8 in. Tube Stub Reducer

Dimension A	15.24mm
Dimension B	17.78mm
Dimension I	29.46mm
Dimension L	36.83mm
Dimension d1 [Min]	2.1mm
Dimension d [Min]	4.83mm

Inch/Metric	Inch
Tube Outside Diameter D	1/4in, mm
Tube Outside Diameter D1	1/8in
Width Across Flats h	1/2in, mm

Swagelok®	400-R-2
Parker (Alok)®	2TUR4
Hy-Lok®	CUR 4-2
Tylok (CBC-Lok)®	4-DRATT-2
Ham-Let (Let-Lok)®	767LT 1/4 X 1/8
Hoke (Gyrolok)®	4R2
Dk-Lok®	DR4-2
Bi-Lok (Series D)®	DRE-4-2
SSP (DUlok)®	D4R2

SR 4-3 SR Reducers

SR 1/4 in. Tube Outside Diameter D x 3/16 in. Tube Stub Reducer

Dimension A	15.24mm
Dimension B	17.78mm
Dimension I	30.22mm
Dimension L	37.59mm
Dimension d1 [Min]	3.0mm
Dimension d [Min]	4.83mm

Inch/Metric	Inch
Tube Outside Diameter D	1/4in, mm
Tube Outside Diameter D1	3/16in
Width Across Flats h	1/2in, mm

Swagelok®	400-R-3
Parker (Alok)®	3TUR4
Hy-Lok®	CUR 4-3
Tylok (CBC-Lok)®	4-DRATT-3
Ham-Let (Let-Lok)®	767LT 1/4 X 3/16
Hoke (Gyrolok)®	4R3
Dk-Lok®	DR4-3
Bi-Lok (Series D)®	DRE-4-3
SSP (DUlok)®	D4R3

SR 4-4 SR Reducers

SR 1/4 in. Tube Outside Diameter D x 1/4 in. Tube Stub Reducer

Dimension A	15.24mm
Dimension B	17.78mm
Dimension I	31.75mm
Dimension L	39.11mm
Dimension d1 [Min]	4.4mm
Dimension d [Min]	4.83mm

Inch/Metric	Inch
Tube Outside Diameter D	1/4in, mm
Tube Outside Diameter D1	1/4in
Width Across Flats h	1/2in, mm

Swagelok®	400-R-4
Parker (Alok)®	4TUR4
Hy-Lok®	CUR 4-4
Tylok (CBC-Lok)®	4-DRATT-4
Ham-Let (Let-Lok)®	767LT 1/4 X 1/4
Hoke (Gyrolok)®	4R4
Dk-Lok®	DR4-4
Bi-Lok (Series D)®	DRE-4-4
SSP (DUlok)®	D4R4

SR 4-5 SR Reducers

SR 1/4 in. Tube Outside Diameter D x 5/16 in. Tube Stub Reducer

Dimension A	15.24mm
Dimension B	17.78mm
Dimension I	32.51mm
Dimension L	39.87mm
Dimension d1 [Min]	5.6mm
Dimension d [Min]	4.83mm

Inch/Metric	Inch
Tube Outside Diameter D	1/4in, mm
Tube Outside Diameter D1	5/16in
Width Across Flats h	1/2in, mm

Swagelok®	400-R-5
Parker (Alok)®	5TUR4
Hy-Lok®	CUR 4-5
Tylok (CBC-Lok)®	4-DRATT-5
Ham-Let (Let-Lok)®	767LT 1/4 X 5/16
Hoke (Gyrolok)®	4R5
Dk-Lok®	DR4-5
Bi-Lok (Series D)®	DRE-4-5
SSP (DUlok)®	D4R5

SR 4-6 SR Reducers

SR 1/4 in. Tube Outside Diameter D x 3/8 in. Tube Stub Reducer

Dimension A	15.24mm
Dimension B	17.78mm
Dimension I	33.27mm
Dimension L	40.64mm
Dimension d1 [Min]	6.9mm
Dimension d [Min]	4.83mm

Inch/Metric	Inch
Tube Outside Diameter D	1/4in, mm
Tube Outside Diameter D1	3/8in
Width Across Flats h	1/2in, mm

Swagelok®	400-R-6
Parker (Alok)®	6TUR4
Hy-Lok®	CUR 4-6
Tylok (CBC-Lok)®	4-DRATT-6
Ham-Let (Let-Lok)®	767LT 1/4 X 3/8
Hoke (Gyrolok)®	4R6
Dk-Lok®	DR4-6
Bi-Lok (Series D)®	DRE-4-6
SSP (DUlok)®	D4R6

SR 4-8 SR Reducers

SR 1/4 in. Tube Outside Diameter D x 1/2 in. Tube Stub Reducer

Dimension A	15.24mm
Dimension B	17.78mm
Dimension I	38.86mm
Dimension L	46.22mm
Dimension d1 [Min]	9.4mm
Dimension d [Min]	4.83mm

Inch/Metric	Inch
Tube Outside Diameter D	1/4in, mm
Tube Outside Diameter D1	1/2in
Width Across Flats h	9/16in, mm

Swagelok®	400-R-8
Parker (Alok)®	8TUR4
Hy-Lok®	CUR 4-8
Tylok (CBC-Lok)®	4-DRATT-8
Ham-Let (Let-Lok)®	767LT 1/4 X 1/2
Hoke (Gyrolok)®	4R8
Dk-Lok®	DR4-8
Bi-Lok (Series D)®	DRE-4-8
SSP (DUlok)®	D4R8

SR 4-10 SR Reducers

SR 1/4 in. Tube Outside Diameter D x 5/8 in. Tube Stub Reducer

Dimension A	15.24mm
Dimension B	17.78mm
Dimension I	40.64mm
Dimension L	48.0mm
Dimension d1 [Min]	12.0mm
Dimension d [Min]	4.83mm

Inch/Metric	Inch
Tube Outside Diameter D	1/4in, mm
Tube Outside Diameter D1	5/8in
Width Across Flats h	11/16in, mm

Swagelok®	400-R-10
Parker (Alok)®	10TUR4
Hy-Lok®	CUR 4-10
Tylok (CBC-Lok)®	4-DRATT-10
Ham-Let (Let-Lok)®	767LT 1/4 X 5/8
Hoke (Gyrolok)®	4R10
Dk-Lok®	DR4-10
Bi-Lok (Series D)®	DRE-4-10
SSP (DUlok)®	D4R10

SR 4-12 SR Reducers

SR 1/4 in. Tube Outside Diameter D x 3/4 in. Tube Stub Reducer

Dimension A	15.24mm
Dimension B	17.78mm
Dimension I	41.40mm
Dimension L	47.75mm
Dimension d1 [Min]	14.8mm
Dimension d [Min]	4.83mm

Inch/Metric	Inch
Tube Outside Diameter D	1/4in, mm
Tube Outside Diameter D1	3/4in
Width Across Flats h	13/16in, mm

Swagelok®	400-R-12
Parker (Alok)®	12TUR4
Hy-Lok®	CUR 4-12
Tylok (CBC-Lok)®	4-DRATT-12
Ham-Let (Let-Lok)®	767LT 1/4 X 3/4
Hoke (Gyrolok)®	4R12
Dk-Lok®	DR4-12
Bi-Lok (Series D)®	DRE-4-12
SSP (DUlok)®	D4R12

SR 6-4 SR Reducers

SR 3/8 in. Tube Outside Diameter D x 1/4 in. Tube Stub Reducer

Dimension A	16.76mm
Dimension B	19.30mm
Dimension I	34.03mm
Dimension L	41.40mm
Dimension d1 [Min]	4.4mm
Dimension d [Min]	7.11mm

Inch/Metric	Inch
Tube Outside Diameter D	3/8in, mm
Tube Outside Diameter D1	1/4in
Width Across Flats h	5/8in, mm

Swagelok®	600-R-4
Parker (Alok)®	4TUR6
Hy-Lok®	CUR 6-4
Tylok (CBC-Lok)®	6-DRATT-4
Ham-Let (Let-Lok)®	767LT 3/8 X 1/4
Hoke (Gyrolok)®	6R4
Dk-Lok®	DR6-4
Bi-Lok (Series D)®	DRE-6-4
SSP (DUlok)®	D6R4

SR 6-6 SR Reducers

SR 3/8 in. Tube Outside Diameter D x 3/8 in. Tube Stub Reducer

Dimension A	16.76mm
Dimension B	19.30mm
Dimension I	35.81mm
Dimension L	43.18mm
Dimension d1 [Min]	6.9mm
Dimension d [Min]	7.11mm

Inch/Metric	Inch
Tube Outside Diameter D	3/8in, mm
Tube Outside Diameter D1	3/8in
Width Across Flats h	5/8in, mm

SR 6-8 SR Reducers

SR 3/8 in. Tube Outside Diameter D x 1/2 in. Tube Stub Reducer

SR 6-10 SR Reducers

SR 3/8 in. Tube Outside Diameter D x 5/8 in. Tube Stub Reducer

SR 6-12 SR Reducers

SR 3/8 in. Tube Outside Diameter D x 3/4 in. Tube Stub Reducer

SR 6M-4 SR Reducers

SR 6 mm Tube Outside Diameter D x 1/4 in. Tube Stub Reducer

SR 8-4 SR Reducers

SR 1/2 in. Tube Outside Diameter D x 1/4 in. Tube Stub Reducer

SR 8-6 SR Reducers

SR 1/2 in. Tube Outside Diameter D x 3/8 in. Tube Stub Reducer

SR 8-8 SR Reducers

SR 1/2 in. Tube Outside Diameter D x 1/2 in. Tube Stub Reducer

SR 8-10 SR Reducers

SR 1/2 in. Tube Outside Diameter D x 5/8 in. Tube Stub Reducer

SR 8-12 SR Reducers

SR 1/2 in. Tube Outside Diameter D x 3/4 in. Tube Stub Reducer

SR 8-16 SR Reducers

SR 1/2 in. Tube Outside Diameter D x 1 in. Tube Stub Reducer

SR 8M-8 SR Reducers

SR 8 mm Tube Outside Diameter DX 1/2 in. Tube Stub Reducer

SR 10-12 SR Reducers

SR 5/8 in. Tube Outside Diameter D x 3/4 in. Tube Stub Reducer

SR 10-14 SR Reducers

SR 5/8 in. Tube Outside Diameter D x 7/8 in. Tube Stub Reducer

SR 10M-8 SR Reducers

SR 10 mm Tube Outside Diameter DX 1/2 in. Tube Stub Reducer

SR 12-8 SR Reducers

SR 3/4 in. Tube Outside Diameter D x 1/2 in. Tube Stub Reducer

SR 12-16 SR Reducers

SR 3/4 in. Tube Outside Diameter D x 1 in. Tube Stub Reducer

SR 12M-8 SR Reducers

SR 12 mm Tube Outside Diameter D x 1/2 in. Tube Stub Reducer

Swagelok®	600-R-6
Parker (Alok)®	6TUR6
Hy-Lok®	CUR 6-6
Tylok (CBC-Lok)®	6-DRATT-6
Ham-Let (Let-Lok)®	767LT 3/8 X 3/8
Hoke (Gyrolok)®	6R6
Dk-Lok®	DR6-6
Bi-Lok (Series D)®	DRE-6-6
SSP (DUlok)®	D6R6

Swagelok®	600-R-8
Parker (Alok)®	8TUR6
Hy-Lok®	CUR 6-8
Tylok (CBC-Lok)®	6-DRATT-8
Ham-Let (Let-Lok)®	767LT 3/8 X 1/2
Hoke (Gyrolok)®	6R8
Dk-Lok®	DR6-8
Bi-Lok (Series D)®	DRE-6-8
SSP (DUlok)®	D6R8

Swagelok®	600-R-10
Parker (Alok)®	10TUR6
Hy-Lok®	CUR 6-10
Tylok (CBC-Lok)®	6-DRATT-10
Ham-Let (Let-Lok)®	767LT 3/8 X 5/8
Hoke (Gyrolok)®	6R10
Dk-Lok®	DR6-10
Bi-Lok (Series D)®	DRE-6-10
SSP (DUlok)®	D6R10

Swagelok®	600-R-12
Parker (Alok)®	12TUR6
Hy-Lok®	CUR 6-12
Tylok (CBC-Lok)®	6-DRATT-12
Ham-Let (Let-Lok)®	767LT 3/8 X 3/4
Hoke (Gyrolok)®	6R12
Dk-Lok®	DR6-12
Bi-Lok (Series D)®	DRE-6-12
SSP (DUlok)®	D6R12

Dimension A	15.3mm
Dimension B	17.7mm
Dimension I	38.9mm
Dimension L	46.3mm
Dimension d1 [Min]	9.4mm
Dimension d [Min]	4.8mm

Inch/Metric	Metric
Tube Outside Diameter D	in, 6mm
Tube Outside Diameter D1	1/2in
Width Across Flats h	in, 14mm

Dimension A	22.86mm
Dimension B	21.84mm
Dimension I	34.79mm
Dimension L	44.95mm
Dimension d1 [Min]	4.4mm
Dimension d [Min]	10.41mm

Swagelok®	810-R-4
Parker (Alok)®	4TUR8
Hy-Lok®	CUR 8-4
Tylok (CBC-Lok)®	8-DRATT-4
Ham-Let (Let-Lok)®	767LT 1/2 X 1/4
Hoke (Gyrolok)®	8R4
Dk-Lok®	DR8-4
Bi-Lok (Series D)®	DRE-8-4
SSP (DUlok)®	D8R4

Swagelok®	810-R-6
Parker (Alok)®	6TUR 8
Hy-Lok®	CUR 8-6
Tylok (CBC-Lok)®	8-DRATT-6
Ham-Let (Let-Lok)®	767LT 1/2 X 3/8
Hoke (Gyrolok)®	8R6
Dk-Lok®	DR8-6
Bi-Lok (Series D)®	DRE-8-6
SSP (DUlok)®	D8R6

Swagelok®	810-R-8
Parker (Alok)®	8TUR8
Hy-Lok®	CUR 8-8
Tylok (CBC-Lok)®	8-DRATT-8
Ham-Let (Let-Lok)®	767LT 1/2 X 1/2
Hoke (Gyrolok)®	8R8
Dk-Lok®	DR8-8
Bi-Lok (Series D)®	DRE-8-8
SSP (DUlok)®	D8R8

Swagelok®	810-R-10
Parker (Alok)®	10TUR8
Hy-Lok®	CUR 8-10
Tylok (CBC-Lok)®	8-DRATT-10
Ham-Let (Let-Lok)®	767LT 1/2 X 5/8
Hoke (Gyrolok)®	8R10
Dk-Lok®	DR8-10
Bi-Lok (Series D)®	DRE-8-10
SSP (DUlok)®	D8R10

Swagelok®	810-R-12
Parker (Alok)®	12TUR8
Hy-Lok®	CUR 8-12
Tylok (CBC-Lok)®	8-DRATT-12
Ham-Let (Let-Lok)®	767LT 1/2 X 3/4
Hoke (Gyrolok)®	8R12
Dk-Lok®	DR8-12
Bi-Lok (Series D)®	DRE-8-12
SSP (DUlok)®	D8R12

Swagelok®	810-R-16
Parker (Alok)®	16TUR8
Hy-Lok®	CUR 8-16
Tylok (CBC-Lok)®	8-DRATT-16
Ham-Let (Let-Lok)®	767LT 1/2 X 1
Hoke (Gyrolok)®	8R16
Dk-Lok®	DR8-16
Bi-Lok (Series D)®	DRE-8-16
SSP (DUlok)®	D8R16

Dimension A	16.2mm
Dimension B	18.6mm
Dimension I	40.1mm
Dimension L	47.6mm
Dimension d1 [Min]	9.4mm
Dimension d [Min]	6.4mm

Dimension A	24.38mm
Dimension B	21.84mm
Dimension I	44.45mm
Dimension L	54.61mm
Dimension d1 [Min]	14.8mm
Dimension d [Min]	12.70mm

Swagelok®	1010-R-12
Parker (Alok)®	12TUR10
Hy-Lok®	CUR 10-12
Tylok (CBC-Lok)®	10-DRATT-12
Ham-Let (Let-Lok)®	767LT 5/8 X 3/4
Hoke (Gyrolok)®	10R12
Dk-Lok®	DR10-12
Bi-Lok (Series D)®	DRE-10-12
SSP (DUlok)®	D10R12

Swagelok®	1010-R-14
Parker (Alok)®	14TUR10
Hy-Lok®	CUR 10-14
Tylok (CBC-Lok)®	10-DRATT-14
Ham-Let (Let-Lok)®	767LT 5/8 X 7/8
Hoke (Gyrolok)®	10R14
Dk-Lok®	DR10-14
Bi-Lok (Series D)®	DRE-10-14
SSP (DUlok)®	D10R14

Dimension A	17.2mm
Dimension B	19.5mm
Dimension I	42.2mm
Dimension L	49.8mm
Dimension d1 [Min]	9.4mm
Dimension d [Min]	7.9mm

Swagelok®	1210-R-8
Parker (Alok)®	8TUR12
Hy-Lok®	CUR 12-8
Tylok (CBC-Lok)®	12-DRATT-8
Ham-Let (Let-Lok)®	767LT 3/4 X 1/2
Hoke (Gyrolok)®	12R8
Dk-Lok®	DR12-8
Bi-Lok (Series D)®	DRE-12-8
SSP (DUlok)®	D12R8

Swagelok®	1210-R-16
Parker (Alok)®	16TUR12
Hy-Lok®	CUR 12-16
Tylok (CBC-Lok)®	12-DRATT-16
Ham-Let (Let-Lok)®	767LT 3/4 X 1
Hoke (Gyrolok)®	12R16
Dk-Lok®	DR12-16
Bi-Lok (Series D)®	DRE-12-16
SSP (DUlok)®	D12R16

Dimension A	22.8mm
Dimension B	22.0mm
Dimension I	42.2mm
Dimension L	52.3mm
Dimension d1 [Min]	9.4mm
Dimension d [Min]	9.5mm