ST4BF4 by Dixon Valve | Hydraulic Quick Disconnect Coupling | ST-Series | 1/2" Female BSPP x 1/2" Heavy-Duty Flushface | Plug | Steel

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Dixon Valve & Coupling
Hydraulic Coupling: ST-Series Heavy-Duty Flushface Plug (Female Threads)

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Specifications for Variant SKU: ST4BF4 Dixon
Series:	ST-Series
Shape (Orientation):	Straight
Ends Configuration:	1/2in Male V-Series QD Interchange, 1/2in Female BSPP
Material(s):	Steel

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:	For a selection guide, cross reference tables, safety info, fluid compatibility, and other general info, please see: Dixon Valve Quick Disconnect Guide.PDF

ST-Series \| Heavy-Duty Flushface Rated Pressure Chart
Body Size	Steel Coupler/Plug Coupled		316 Stainless Coupler/Plug Coupled
Body Size	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 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"

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"

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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