BSPP (G) parallel thread hose barb fittings machined to order in 316 and 304 stainless steel and galvanised carbon steel, DN15 to DN300. ISO 9001 CNC production, OEM and private label supported, shipping to Australia and New Zealand with full export documentation.
Australia and New Zealand run on BSP. Most catalogue stock sold out of North America is NPT. The two look similar enough to cross-thread, and that mistake is expensive once an assembly is already crimped. Here is the difference, plainly.
| Standard | Designation | Form thread angle | Taper | Where it seals | Common in |
|---|---|---|---|---|---|
| BSPP | G — ISO 228 | Whitworth, 55° | Parallel | On the face — bonded seal, O-ring or washer | Australia, NZ, UK, South Africa, most of Asia |
| BSPT | R — ISO 7-1 | Whitworth, 55° | Tapered 1:16 | On the thread flanks — needs sealant or PTFE tape | Australia, NZ, UK, water and air lines |
| NPT | ANSI/ASME B1.20.1 | Sellers, 60° | Tapered 1:16 | On the thread flanks — needs sealant or PTFE tape | United States, Canada |
The 1/2" and 3/4" trap. At 1/2" and 3/4", BSP and NPT happen to share the same 14 threads per inch. A BSP hose barb fitting will start to turn into an NPT port and feel like it is going in correctly. It is not — the 55° and 60° flanks never mate, so the joint will weep under pressure and both threads end up damaged. At 1" the pitches diverge (NPT 11.5 TPI, BSP 11 TPI) and the mismatch is obvious. Always confirm the standard on the drawing before you order.
What Sunze supplies: BSPP (G) parallel thread is our standard on hose barb fittings for the Australian and New Zealand market. BSPT (R) and NPT are cut to order — if your assembly needs NPT, see our King Nipple / KC nipple range.
Combination hose barb fittings with a serrated shank and male BSP SCH120 thread, for use with a hose clamp, band or crimp ferrule. Machined from bar and seamless tube on our own CNC lines, DN15 to DN300.
| Nominal Bore DN | Size inch | Galvanised Steel FDKP · BSP SCH120 | SS304 / SS316 FDKS · BSP SCH120 | Shank Length mm |
|---|---|---|---|---|
| DN15 | 1/2" | FDKP050 | FDKS1050 | 75 |
| DN20 | 3/4" | FDKP075 | FDKS1075 | 80 |
| DN25 | 1" | FDKP100 | FDKS1100 | 85 |
| DN32 | 1-1/4" | FDKP125 | FDKS1125 | 92 |
| DN40 | 1-1/2" | FDKP150 | FDKS1150 | 100 |
| DN50 | 2" | FDKP200 | FDKS1200 | 117 |
| DN65 | 2-1/2" | FDKP250 | FDKS1250 | 140 |
| DN80 | 3" | FDKP300 | FDKS1300 | 152 |
| DN100 | 4" | FDKP400 | FDKS1400 | 184 |
| DN125 | 5" | FDKP500 | FDKS1500 | 239 |
| DN150 | 6" | FDKP600 | FDKS1600 | 253 |
| DN200 | 8" | FDKP800 | FDKS1800 | 285 |
| DN250 | 10" | FDKP1000 | FDKS11000 | 335 |
| DN300 | 12" | FDKP1200 | FDKS11200 | 400 |
All dimensions in millimetres. Threads cut to BSP SCH120; NPT available on the same part numbers. MOQ from 100 pieces, samples in 7 days. Custom shank lengths, serration profiles and non-standard dimensions welcome — send a drawing or a sample. Made in Taiwan, exported worldwide.
A grooved crimp-style hose barb fitting machined from seamless steel tube, zinc plated or SS304. The external groove keys into the slots of an F60 slotted ferrule, giving a positive mechanical lock that a plain crimp cannot — the usual specification for large-bore suction and delivery assemblies on mine sites and bulk transfer. Male BSP thread, DN40 to DN150.
| Nominal Bore DN | Size inch | BSP Part No. FDK5NxxxB | Overall Length L mm | Shank Length B1 mm | MOQ pcs |
|---|---|---|---|---|---|
| DN40 | 1-1/2" | FDK5N015B | — | — | On request |
| DN50 | 2" | FDK5N020B | 148 | 87 | On request |
| DN80 | 3" | FDK5N030B | 200 | 123 | 30 |
| DN100 | 4" | FDK5N040B | 215 | 131 | 30 |
| DN125 | 5" | On request | 210 | 131 | 27 |
| DN150 | 6" | FDK5N060B | 261 | 170 | 23 |
DN125 (5") is made in BSP as well as NPT — ask for the BSP part number on the enquiry. Matching F50, F60 and F70 crimp ferrules are manufactured in-house — see the full ferrule range and part-number tables. Send us your hose outside diameter and we will match the ferrule to the tail. Read the full hose barb fitting and ferrule selection guide →
The FDK6N is the second-generation crimp-style hose tail, machined from the same plated seamless steel tube as the FDK5N but dimensioned for the heavy-duty F6040D ferrule with its 0.12" wall. Where the FDK5N is specified for maximum hose retention, the FDK6N is the shorter fitting for the same bore, which is what makes it the choice for high-volume crimped assemblies. Male BSP or NPT thread, DN40 to DN150.
| Nominal Bore DN | Size inch | BSP Part No. FDK6NxxxB | Overall Length L mm | Shank Length K2 mm | MOQ pcs |
|---|---|---|---|---|---|
| DN40 | 1-1/2" | FDK6N015B | 100 | 70 | 60 |
| DN50 | 2" | FDK6N020B | 117 | 82 | 51 |
| DN80 | 3" | FDK6N030B | 152 | 102 | 39 |
| DN100 | 4" | FDK6N040B | 181 | 104 | 33 |
| DN150 | 6" | FDK6N060B | 253 | 151 | 23 |
L is the overall length of the fitting and K2 the length of the serrated shank; on the FDK5N table above the shank dimension is listed as B1. All dimensions in millimetres, taken from the current Sunze catalogue. NPT equivalents carry an N suffix in place of the B. The 2" FDK5N is machined from CH40 heavy-wall tube, so its quantity is confirmed at quotation, and the 5" is made in BSP as well as NPT — ask for it on the enquiry. Prices are quoted FOB Taiwan on request, and dimensions outside the standard table are machined to drawing. Buying repeat volume or under your own brand? See our king nipple supplier terms, MOQs and OEM options.
A crimped hose tail is only as good as the ferrule around it. Sunze machines all four ferrule families in-house alongside the tails, so bore, wall and serration profile are cut to match — which is the part buyers discover the hard way when nipples and ferrules are bought from two different factories.
| Ferrule Series | Style | Material & finish | Wall Thickness inch | Size Range | Pairs With |
|---|---|---|---|---|---|
| F60xxxxS F61xxxxSS | Slotted crimp | Zinc-plated carbon steel SS304 | 0.060 standard | 3/4" – 6" | FDK5N, FDKP / FDKS |
| F60xxxxD | Slotted crimp, heavy duty | Zinc-plated carbon steel | 0.12 | 3/4" – 6" | FDK6N |
| F50xxxxS F51xxxxSS | Smooth sleeve crimp | Zinc-plated carbon steel SS304 | 0.060 – 0.12 | 3/4" – 6" | FDKP / FDKS |
| F70xxxxxx | External swage, with collar | Hot-finished seamless, zinc plated | To drawing | 2" – 6" | FDK5N |
The F60 slotted ferrule is the default for multi-spiral and braid-reinforced industrial hose: the slot pattern lets the ferrule compress evenly, so one ferrule bore covers a band of hose outside diameters rather than a single OD. The F50 sleeve is the same wall without the slots, for assemblies that need a clean, uniform crimped profile. The F70 external swage ferrule carries an integral collar that positions the ferrule during swaging and prevents pull-out under pressure — rated to 300 psi maximum working pressure and specified for wire-braid and spiral hose in oil and gas, marine loading, LP gas and chemical transfer. Ferrule bore, overall length and wall thickness are machined to order; send the hose OD range and the assembly drawing.
Sunze supplies BSPP (G) parallel thread as standard on hose tails. The table below is the parallel-thread series to ISO 228-1, listed against the nominal sizes Sunze machines — for checking a tail against a mating coupling, or writing a purchase specification.
| Hose Tail Size inch | Thread Designation ISO 228-1 | Threads per Inch | Pitch mm | Major Diameter mm |
|---|---|---|---|---|
| 1/2" | G 1/2 | 14 | 1.814 | 20.955 |
| 3/4" | G 3/4 | 14 | 1.814 | 26.441 |
| 1" | G 1 | 11 | 2.309 | 33.249 |
| 1-1/4" | G 1-1/4 | 11 | 2.309 | 41.910 |
| 1-1/2" | G 1-1/2 | 11 | 2.309 | 47.803 |
| 2" | G 2 | 11 | 2.309 | 59.614 |
| 2-1/2" | G 2-1/2 | 11 | 2.309 | 75.184 |
| 3" | G 3 | 11 | 2.309 | 87.884 |
| 4" | G 4 | 11 | 2.309 | 113.030 |
| 5" | G 5 | 11 | 2.309 | 138.430 |
| 6" | G 6 | 11 | 2.309 | 163.830 |
Threads per inch, pitch and major diameter are fixed by ISO 228-1 and are identical on every manufacturer's BSPP thread. The 55° Whitworth form means a BSP tail will not seal in an NPT port even where the two appear to engage. BSPP seals on a face — bonded seal, O-ring or sealing washer — not on the thread, so the mating port needs a machined seat. Where a taper thread is required, state it on the enquiry.
The right grade depends far more on the environment around the fitting than on the fluid inside it. Coastal air, wash-down chemicals and mine-site brine are what actually kill hose barb fittings.
Adds roughly 2–3% molybdenum over 304, which is what buys the resistance to chloride pitting. Specify it anywhere salt is in the picture — coastal plants, jetties, aquaculture, marine, mine-site brine and most chemical transfer duties.
Our standard stainless grade and the right answer for most jobs: general industrial, food and beverage, potable and irrigation water, and clean-in-place lines. Strong corrosion resistance inland, but it will pit in a salt-laden atmosphere.
The cost-effective choice where corrosion load is low and price matters: compressed air, general water transfer, dry bulk, agricultural and irrigation lines. Highest mechanical strength of the three, and the shortest lead time on large volumes.
Material certificates (EN 10204 3.1) are supplied on request with every stainless order. Other grades — duplex, brass, special alloys — are available for OEM programmes.
Hose tails we supply into the Australian and New Zealand market typically end up in these duties.
Large-bore suction and delivery assemblies, dewatering lines, slurry transfer. Grooved FDK5N tails with F60 slotted ferrules where the assembly has to survive being dragged.
Pump-to-hose connections, travelling irrigators, spray units and liquid fertiliser transfer. Galvanised carbon steel in DN25 to DN100 covers most of it.
Portable pump sets, flood and construction dewatering, water cartage. BSPP tails paired with camlock couplings and hose clamps.
Delivery and suction hose ends for tanker and depot use, where the fitting has to be dimensionally repeatable batch after batch.
Wharf, vessel and sea-pen service where 316 stainless is the only sensible specification. Chloride exposure is constant, not occasional.
Wash-down duty and product transfer lines in 304 or 316 stainless, with smooth serrations and clean machining for hygienic assemblies.
Full specifications, dimensional drawings, material grades and price tiers — everything a procurement or engineering team needs to assess Sunze as a supplier.
Trusted by distributors and OEM buyers in 30+ countries.
Click below to download the PDF. Our team will follow up with pricing within 24 hours.
Download Catalogue PDFCommon questions from Australian and New Zealand buyers assessing Sunze as a hose barb fitting supplier. Not covered here? Message us on WhatsApp or request a quote — we respond within 24 hours.
BSPP (G, to ISO 228) is a parallel thread. It does not seal on the thread itself, so it needs a bonded seal, O-ring or sealing washer against a machined face. BSPT (R, to ISO 7-1) is a taper thread that seals on the thread flanks and normally needs sealant or PTFE tape. Both use the 55° Whitworth form. Sunze supplies BSPP (G) as standard on hose barb fittings.
No. BSP uses a 55° Whitworth thread form, NPT uses 60°, so the flanks never mate. At 1/2" and 3/4" the two standards share 14 threads per inch, which means a BSP tail will start to turn into an NPT port and feel correct — it will not seal, and it damages both threads. Confirm the standard on the drawing before ordering.
304 is the standard grade and suits most general industrial, agricultural and water-transfer duties. 316 adds molybdenum for markedly better chloride pitting resistance, which makes it the usual choice for coastal and marine installations, aquaculture, mine-site brine and many chemical transfer duties. We machine 304 as standard and 316 to order.
DN15 to DN300 (1/2" to 12" nominal bore). Non-standard shank lengths, serration profiles and thread sizes are available for OEM orders — send a drawing or a sample and we will quote against it.
Standard MOQ is 100 pieces per specification, with lower quantities available for sample qualification orders. Samples: 7 days. Production: 25–35 days ex works, plus roughly 14–28 days sea freight from Taiwan to Australian east and west coast ports.
Yes — F50 ferrule sleeves, F60 slotted ferrules and F70 external swage ferrules with collar, in carbon steel and stainless. Ferrule internal diameter, length and wall thickness can be matched to your hose outside diameter. See the full ferrule part-number tables.
Yes. We support custom specifications, laser or stamped branding, custom packaging and labelling for distributors, hose assembly houses and brand owners. All parts are machined at our ISO 9001 certified CNC facility in Taiwan and shipped with full export documentation including certificate of origin, packing list and material certificates.
It depends on series and size. The crimp-style tails carry printed MOQs: 30 pieces for 3" and 4" FDK5N, 27 for 5", 23 for 6"; and 60 down to 23 pieces across the FDK6N range from 1-1/2" to 6". The smaller crimp sizes and the full FDKP / FDKS king nipple range are quoted per enquiry because they are machined to the order. Prices are FOB Taiwan.
Either an F60 slotted ferrule in zinc-plated carbon steel or SS304, or an F70 external swage ferrule with collar where the assembly runs at higher pressure — the F70 is rated to 300 psi maximum working pressure. Both ferrule families share matching bore dimensions for the FDK5N serration profile. The FDK6N is the exception: it is dimensioned for the heavy-duty F6040D ferrule with its 0.12" wall.
Both are plated seamless steel tube crimp tails from 1-1/2" to 6". The FDK5N carries a long-lead KC groove profile, which puts the maximum number of serrations under the ferrule for holding power while still letting the hose slide on during assembly; it takes F60 and F70 ferrules. The FDK6N is shorter for the same bore — 117 mm against 148 mm at 2" — and is dimensioned for the heavy-duty F6040D ferrule, which makes it the faster fitting for high-volume crimped assemblies.
Our Taiwan facility runs a full line of CNC lathes, producing consistent, high-tolerance fittings at volume. Every piece is machined in-house, which gives us direct control over quality and lead time rather than depending on a trading chain.
Here’s what long-term customers say about working with Sunze Rubber.
"One of the main reasons we continue working with Sunze is their ability to handle custom requirements. We sometimes need specific sizes or configurations, and their team is willing to discuss solutions rather than simply saying no. That kind of flexibility is hard to find."
"We prefer working directly with manufacturers, and Sunze has been a good partner for us. Their manufacturing capabilities give us confidence in the products we receive, and they've been able to support our requirements as our business has grown. We appreciate the long-term relationship."
"We've worked with Sunze for years and have had a very positive experience. They're responsive, flexible, and easy to communicate with. Whenever we've had a special request or an issue to work through, they've been willing to help find a solution. We're happy to continue doing business with them."
Tell us the size, thread standard, material and quantity — we will come back with pricing and lead time within one business day. Or skip the form and message us directly on WhatsApp.
Direct email: sales@sunze.com.tw