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3STF4 by Dixon Valve | Hydraulic Quick Disconnect Coupling | ST-Series | 1/2" Female NPTF x 3/8" Heavy-Duty Flushface | Socket | Nitrile Seal | Steel
3STF4 by Dixon Valve | Hydraulic Quick Disconnect Coupling | ST-Series | 1/2" Female NPTF x 3/8" Heavy-Duty Flushface | Socket | Nitrile Seal | Steel
3STF4 by Dixon Valve | Hydraulic Quick Disconnect Coupling | ST-Series | 1/2" Female NPTF x 3/8" Heavy-Duty Flushface | Socket | Nitrile Seal | Steel

3STF4 by Dixon Valve | Hydraulic Quick Disconnect Coupling | ST-Series | 1/2" Female NPTF x 3/8" Heavy-Duty Flushface | Socket | Nitrile Seal | Steel

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Dixon Valve & Coupling
Hydraulic Coupling: ST-Series Heavy-Duty Flushface Coupler (Female Threads)
Specifications for Variant SKU: 3STF4 Dixon
Series: ST-Series
Shape (Orientation): Straight
Ends Configuration: 3/8in Female V-Series QD Interchange, 1/2in Female NPTF
Material(s): Steel
Seal Material(s): Buna-N/Nitrile Rubber
Compatibility & Interchange:
  • Interchangeable with Parker/Snap-Tite 71-Series
Construction:
  • Machined components are manufactured using solid steel or 316 stainless bar stock.
  • Stainless steel balls, retaining rings, and springs maximize corrosion resistance and extend service life.
  • Steel componentry is plated using ROHS-compliant trivalent chrome.
  • Steel coupler sleeves are hardened to resist deformation and maximize service life.
  • Steel plugs are hardened to provide heavy-duty performance.
Seal Components:
  • Nitrile seals are standard, providing a temperature range of -40°F to 250°F (-40°C to 121°C).
  • All couplers and plugs incorporate PTFE anti-extrusion rings to protect the seal components from dynamic impulse damage.
Note:
  • Minimum burst pressure ratings were established under laboratory conditions using a Static Burst Unit (SBU). For high impulse applications and to meet Det Norske Veritas (DNV) compliance, the burst pressure must be divided by four (4) to ensure a 4:1 safety factor during system operation.
Additional Information:
ST-Series | Heavy-Duty Flushface Rated Pressure Chart
Body Size Steel Coupler/Plug Coupled 316 Stainless Coupler/Plug Coupled
Maximum Working Burst Maximum Working Burst
1/4" 10,000 PSI
(700 bar)		 27,300 PSI
(1,800 bar)		 5,000 PSI
(345 bar)		 28,000 PSI
(1,900 bar)
3/8" 10,000 PSI
(700 bar)		 27,300 PSI
(1,800 bar)		 5,000 PSI
(345 bar)		 28,000 PSI
(1,900 bar)
1/2" 10,000 PSI
(700 bar)		 22,500 PSI
(1,500 bar)		 5,000 PSI
(345 bar)		 25,000 PSI
(1,700 bar)
3/4" 7,500 PSI
(500 bar)		 20,200 PSI
(1,400 bar)		 5,000 PSI
(345 bar)		 22,800 PSI
(1,550 bar)
1" 7,500 PSI
(500 bar)		 19,400 PSI
(1,300 bar)		 4,000 PSI
(275 bar)		 18,500 PSI
(1,250 bar)
1"-V2 8,500 PSI
(585 bar)		 25,900 PSI
(1,750 bar)		 - -
2" 5,000 PSI
(345 bar)		 16,000 PSI
(1,100 bar)		 3,000 PSI
(200 bar)		 10,000 PSI
(700 bar)
ST-Series | Heavy-Duty Flushface Coupler (Female Threads)
Part
Number		 Coupling
Type		 Body
Size		 Threads Material Length Max.
OD		 Hex
2STF2 Socket/Female 1/4" 1/4" - 18 Female NPTF Steel 1.96"
(49.8mm)		 1.23"
(31.2mm)		 15/16"
2STF2-SS Socket/Female 1/4" 1/4" - 18 Female NPTF 316 Stainless 1.96"
(49.8mm)		 1.23"
(31.2mm)		 15/16"
2STBF2 Socket/Female 1/4" 1/4" - 19 Female BSPP Steel 1.96"
(49.8mm)		 1.23"
(31.2mm)		 15/16"
2STBF2-SS Socket/Female 1/4" 1/4" - 19 Female BSPP 316 Stainless 1.96"
(49.8mm)		 1.23"
(31.2mm)		 15/16"
3STF2 Socket/Female 3/8" 1/4" - 18 Female NPTF Steel 2.36"
(59.9mm)		 1.60"
(40.6mm)		 1-3/16"
3STF3 Socket/Female 3/8" 3/8" - 18 Female NPTF Steel 2.36"
(59.9mm)		 1.60"
(40.6mm)		 1-3/16"
3STF3-SS Socket/Female 3/8" 3/8" - 18 Female NPTF 316 Stainless 2.36"
(59.9mm)		 1.60"
(40.6mm)		 1-3/16"
3STBF3 Socket/Female 3/8" 3/8" - 19 Female BSPP Steel 2.36"
(59.9mm)		 1.60"
(40.6mm)		 1-3/16"
3STBF3-SS Socket/Female 3/8" 3/8" - 19 Female BSPP 316 Stainless 2.36"
(59.9mm)		 1.60"
(40.6mm)		 1-3/16"
3STF4 Socket/Female 3/8" 1/2" - 14 Female NPTF Steel 2.36"
(59.9mm)		 1.60"
(40.6mm)		 1-3/16"
3STBF4 Socket/Female 3/8" 1/2" - 14 Female BSPP Steel 2.36"
(59.9mm)		 1.60"
(40.6mm)		 1-3/16"
3STBF4-SS Socket/Female 3/8" 1/2" - 14 Female BSPP 316 Stainless 2.36"
(59.9mm)		 1.60"
(40.6mm)		 1-3/16"
4STF4 Socket/Female 1/2" 1/2" - 14 Female NPTF Steel 2.77"
(70.4mm)		 1.98"
(50.3mm)		 1-1/2"
4STF4-SS Socket/Female 1/2" 1/2" - 14 Female NPTF 316 Stainless 2.77"
(70.4mm)		 1.98"
(50.3mm)		 1-1/2"
4STBF4 Socket/Female 1/2" 1/2" - 14 Female BSPP Steel 2.77"
(70.4mm)		 1.98"
(50.3mm)		 1-1/2"
4STBF4-SS Socket/Female 1/2" 1/2" - 14 Female BSPP 316 Stainless 2.77"
(70.4mm)		 1.98"
(50.3mm)		 1-1/2"
4STOF4 Socket/Female 1/2" 3/4" - 16 Female ORB Steel 2.77"
(70.4mm)		 1.98"
(50.3mm)		 1-1/2"
6STF6 Socket/Female 3/4" 3/4" - 14 Female NPTF Steel 3.03"
(77.0mm)		 2.35"
(59.7mm)		 1-3/4"
6STF6-SS Socket/Female 3/4" 3/4" - 14 Female NPTF 316 Stainless 3.03"
(77.0mm)		 2.35"
(59.7mm)		 1-3/4"
6STBF6 Socket/Female 3/4" 3/4" - 14 Female BSPP Steel 3.03"
(77.0mm)		 2.35"
(59.7mm)		 1-3/4"
6STBF6-SS Socket/Female 3/4" 3/4" - 14 Female BSPP 316 Stainless 3.03"
(77.0mm)		 2.35"
(59.7mm)		 1-3/4"
6STOF6 Socket/Female 3/4" 1-1/16" - 12 Female ORB Steel 3.03"
(77.0mm)		 2.35"
(59.7mm)		 1-3/4"
8STF8 Socket/Female 1" 1" - 11-1/2 Female NPTF Steel 3.33"
(84.6mm)		 2.73"
(69.3mm)		 2"
8STF8-SS Socket/Female 1" 1" - 11-1/2 Female NPTF 316 Stainless 3.33"
(84.6mm)		 1.55"
(39.3mm)		 2"
8STBF8 Socket/Female 1" 1" - 11 Female BSPP Steel 3.33"
(84.6mm)		 2.73"
(69.3mm)		 2"
8STBF8-SS Socket/Female 1" 1" - 11 Female BSPP 316 Stainless 3.33"
(84.6mm)		 2.73"
(69.3mm)		 2"
8STOF8 Socket/Female 1" 1"-5/16-12 Female ORB Steel 3.33"
(84.6mm)		 2.73"
(69.3mm)		 2"
8STF10 Socket/Female 1" 1-1/4" - 11-1/2 Female NPTF Steel 3.67"
(93.2mm)		 2.73"
(69.3mm)		 2"
8STBF10 Socket/Female 1" 1-1/4" - 11 Female BSPP Steel 3.67"
(93.2mm)		 2.73"
(69.3mm)		 2"
8STBF10-SS Socket/Female 1" 1-1/4" - 11 Female BSPP 316 Stainless 3.67"
(93.2mm)		 2.73"
(69.3mm)		 2"
16STF12 Socket/Female 2" 1-1/2" - 11-1/2 Female NPTF Steel 6.20"
(157.5mm)		 4.47"
(113.5mm)		 3.78"
16STBF12 Socket/Female 2" 1-1/2" - 11 Female BSPP Steel 6.20"
(157.5mm)		 4.47"
(113.5mm)		 3.78"
16STOF12 Socket/Female 2" 1-7/8" - 12 Female ORB Steel 6.20"
(157.5mm)		 4.47"
(113.5mm)		 3.78"
16STF16 Socket/Female 2" 2" - 11-1/2 Female NPTF Steel 6.20"
(157.5mm)		 4.47"
(113.5mm)		 3.78"
16STF16-SS Socket/Female 2" 2" - 11-1/2 Female NPTF 316 Stainless 6.20"
(157.5mm)		 4.47"
(113.5mm)		 3.78"
16STBF16 Socket/Female 2" 2" - 11 Female BSPP Steel 6.20"
(157.5mm)		 4.47"
(113.5mm)		 3.78"
16STOF16 Socket/Female 2" 2-1/2" - 12 Female ORB Steel 6.20"
(157.5mm)		 4.47"
(113.5mm)		 3.78"
ST-Series | Heavy-Duty Flushface 'Old Style' Coupler (Female Threads)
Part
Number		 Coupling
Type		 Body
Size		 Threads Material Length Max.
OD		 Hex
8STF8-V2 Socket/Female 1" 1" - 11-1/2 Female NPTF Steel 4.55"
(115.6mm)		 2.74"
(69.6mm)		 2"
8STBF8-V2 Socket/Female 1" 1" - 11 Female BSPP Steel 4.55"
(115.6mm)		 2.74"
(69.6mm)		 2"
8STF10-V2 Socket/Female 1" 1-1/4" - 11-1/2 Female NPTF Steel 4.90"
(124.5mm)		 2.74"
(69.6mm)		 2"
ST-Series | Heavy-Duty Flushface Plug (Female Threads)
Part
Number		 Coupling
Type		 Body
Size		 Threads Material Length Max.
OD		 Hex
ST2F2 Plug/Male 1/4" 1/4" - 18 Female NPTF Steel 1.84"
(46.7mm)		 0.90"
(22.9mm)		 13/16"
ST2F2-SS Plug/Male 1/4" 1/4" - 18 Female NPTF 316 Stainless 1.84"
(46.7mm)		 0.90"
(22.9mm)		 13/16"
ST2BF2 Plug/Male 1/4" 1/4" - 19 Female BSPP Steel 1.84"
(46.7mm)		 0.90"
(22.9mm)		 13/16"
ST2BF2-SS Plug/Male 1/4" 1/4" - 19 Female BSPP 316 Stainless 1.84"
(46.7mm)		 0.90"
(22.9mm)		 13/16"
ST3F2 Plug/Male 3/8" 1/4" - 18 Female NPTF Steel 2.32"
(58.9mm)		 1.48"
(37.6mm)		 1"
ST3F3 Plug/Male 3/8" 3/8" - 18 Female NPTF Steel 2.32"
(58.9mm)		 1.48"
(37.6mm)		 1"
ST3F3-SS Plug/Male 3/8" 3/8" - 18 Female NPTF 316 Stainless 2.32"
(58.9mm)		 1.48"
(37.6mm)		 1"
ST3BF3 Plug/Male 3/8" 3/8" - 19 Female BSPP Steel 2.32"
(58.9mm)		 1.48"
(37.6mm)		 1"
ST3BF3-SS Plug/Male 3/8" 3/8" - 19 Female BSPP 316 Stainless 2.32"
(58.9mm)		 1.48"
(37.6mm)		 1"
ST3F4 Plug/Male 3/8" 1/2" - 14 Female NPTF Steel 2.32"
(58.9mm)		 1.48"
(37.6mm)		 1"
ST3F4-SS Plug/Male 3/8" 1/2" - 14 Female NPTF 316 Stainless 2.32"
(58.9mm)		 1.48"
(37.6mm)		 1"
ST3BF4 Plug/Male 3/8" 1/2" - 14 Female BSPP Steel 2.32"
(58.9mm)		 1.48"
(37.6mm)		 1"
ST3BF4-SS Plug/Male 3/8" 1/2" - 14 Female BSPP 316 Stainless 2.32"
(58.9mm)		 1.48"
(37.6mm)		 1"
ST4F4 Plug/Male 1/2" 1/2" - 14 Female NPTF Steel 2.37"
(60.2mm)		 1.65"
(41.9mm)		 1-1/2"
ST4F4-SS Plug/Male 1/2" 1/2" - 14 Female NPTF 316 Stainless 2.37"
(60.2mm)		 1.65"
(41.9mm)		 1-1/2"
ST4BF4 Plug/Male 1/2" 1/2" - 14 Female BSPP Steel 2.37"
(60.2mm)		 1.65"
(41.9mm)		 1-1/2"
ST4BF4-SS Plug/Male 1/2" 1/2" - 14 Female BSPP 316 Stainless 2.37"
(60.2mm)		 1.65"
(41.9mm)		 1-1/2"
ST4OF4 Plug/Male 1/2" 3/4" - 16 Female ORB Steel 2.37"
(60.2mm)		 1.65"
(41.9mm)		 1-1/2"
ST6F6 Plug/Male 3/4" 3/4" - 14 Female NPTF Steel 2.96"
(75.2mm)		 1.92"
(48.8mm)		 1-3/4"
ST6F6-SS Plug/Male 3/4" 3/4" - 14 Female NPTF 316 Stainless 2.96"
(75.2mm)		 1.92"
(48.8mm)		 1-3/4"
ST6BF6 Plug/Male 3/4" 3/4" - 14 Female BSPP Steel 2.96"
(75.2mm)		 1.92"
(48.8mm)		 1-3/4"
ST6BF6-SS Plug/Male 3/4" 3/4" - 14 Female BSPP 316 Stainless 2.96"
(75.2mm)		 1.92"
(48.8mm)		 1-3/4"
ST6OF6 Plug/Male 3/4" 1-1/16" - 12 Female ORB Steel 2.96"
(75.2mm)		 1.92"
(48.8mm)		 1-3/4"
ST8F8 Plug/Male 1" 1" - 11-1/2 Female NPTF Steel 3.22"
(81.8mm)		 2.10"
(53.3mm)		 1-7/8"
ST8F8-SS Plug/Male 1" 1" - 11-1/2 Female NPTF 316 Stainless 3.22"
(81.8mm)		 2.10"
(53.3mm)		 1-7/8"
ST8BF8 Plug/Male 1" 1" - 11 Female BSPP Steel 3.22"
(81.8mm)		 2.10"
(53.3mm)		 1-7/8"
ST8BF8-SS Plug/Male 1" 1" - 11 Female BSPP 316 Stainless 3.22"
(81.8mm)		 2.10"
(53.3mm)		 1-7/8"
ST8OF8 Plug/Male 1" 1-5/16" - 12 Female ORB Steel 3.22"
(81.8mm)		 2.10"
(53.3mm)		 1-7/8"
ST8F10 Plug/Male 1" 1-1/4" - 11-1/2 Female NPTF Steel 3.48"
(88.4mm)		 2.20"
(55.9mm)		 2"
ST8F10-SS Plug/Male 1" 1-1/4" - 11-1/2 Female NPTF 316 Stainless 3.48"
(88.4mm)		 2.20"
(55.9mm)		 2"
ST8BF10 Plug/Male 1" 1-1/4" - 11 Female BSPP Steel 3.48"
(88.4mm)		 2.20"
(55.9mm)		 2"
ST8BF10-SS Plug/Male 1" 1-1/4" - 11 Female BSPP 316 Stainless 3.48"
(88.4mm)		 2.20"
(55.9mm)		 2"
ST16F12 Plug/Male 2" 1-1/2" - 11-1/2 Female NPTF Steel 4.50"
(114.3mm)		 3.48"
(88.4mm)		 3-1/4"
ST16BF12 Plug/Male 2" 1-1/2" - 11 Female BSPP Steel 4.50"
(114.3mm)		 3.48"
(88.4mm)		 3-1/4"
ST16OF12 Plug/Male 2" 1-7/8" - 12 Female ORB Steel 4.50"
(114.3mm)		 3.48"
(88.4mm)		 3-1/4"
ST16F16 Plug/Male 2" 2" - 11-1/2 Female NPTF Steel 4.50"
(114.3mm)		 3.48"
(88.4mm)		 3-1/4"
ST16F16-SS Plug/Male 2" 2" - 11-1/2 Female NPTF 316 Stainless 4.50"
(114.3mm)		 3.48"
(88.4mm)		 3-1/4"
ST16BF16 Plug/Male 2" 2" - 11 Female BSPP Steel 4.50"
(114.3mm)		 3.48"
(88.4mm)		 3-1/4"
ST16OF16 Plug/Male 2" 2-1/2" - 12 Female ORB Steel 4.50"
(114.3mm)		 3.48"
(88.4mm)		 3-1/4"
ST-Series | Heavy-Duty Flushface 'Old Style' Plug (Female Threads)
Part
Number		 Coupling
Type		 Body
Size		 Threads Material Length Max.
OD		 Hex
ST8F8-V2 Plug/Male 1" 1" - 11-1/2 Female NPTF Steel 3.26"
(82.8mm)		 1.92"
(48.8mm)		 1-3/4"
ST8BF8-V2 Plug/Male 1" 1" - 11 Female BSPP Steel 3.26"
(82.8mm)		 1.92"
(48.8mm)		 1-3/4"
ST8F10-V2 Plug/Male 1" 1-1/4" - 11-1/2 Female NPTF Steel 3.50"
(88.9mm)		 1.98"
(50.3mm)		 2"
Dixon Valve & Coupling

Dixon Valve & Coupling

Dixon, founded in 1916, is a premier manufacturer and supplier of hose couplings, valves, dry disconnects, swivels, and other fluid transfer and control products. Our global reach includes a wide range of products for numerous industries including petroleum exploration, refining, transportation, chemical processing, food and beverage, steel, fire protection, construction, mining, and manufacturing.

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