How does a male elbow tube fitting differ from a union elbow?

A union elbow has compression tube ends on both sides — both ends grip a tube OD with nut and ferrules. A male elbow has a compression tube end on one side and a male NPT/BSP threaded end on the other. Use a union elbow when joining two tube runs at 90°; use a male elbow when connecting tubing at 90° to a female-threaded port (valve, instrument, manifold, etc.).

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Male Elbow Tube Fitting Manufacturer & Exporter — India

Q: What is the difference between a male elbow and a female elbow tube fitting?

A male elbow has a compression tube end and an external (male) NPT/BSP threaded end that screws into a female-threaded port. A female elbow has a compression tube end and an internal (female) NPT/BSP threaded end that accepts a male-threaded stem or nipple. Choose male elbow for instruments and valves with female ports; choose female elbow for connections where a male stud or nipple is already present.

Q: What thread standards are available for TES-LOK male elbow tube fittings?

TES-LOK male elbow tube fittings are available with NPT (ANSI/ASME B1.20.1), BSP/BSPP (ISO 228), BSPT (ISO 7), UNF (ANSI/ASME B1.1), ISO, and SAE thread forms on the male-thread end, covering all major regional instrument connection standards.

Q: What is the pressure rating of SS male elbow tube fittings?

SS 304 and SS 316 TES-LOK male elbow tube fittings are rated up to 6000 PSI (413 bar) on the tube-compression end. The male threaded end pressure capability depends on the thread size and engagement; NPT and BSPT tapered threads provide a reliable pressure seal with PTFE tape. Brass variants are rated 300–3000 PSI depending on tube OD.

Q: Is the TES-LOK male elbow available in 45° as well as 90°?

Yes. In addition to the standard 90° male elbow, TES-LOK offers a 45° male elbow tube fitting for installations requiring a shallower directional change. The 45° variant uses the same compression tube end and male thread end but at a 45° body angle, reducing turbulence and allowing routing in tighter spaces.

Q: What industries use male elbow tube fittings?

Male elbow tube fittings are one of the most widely used instrumentation fittings across oil and gas (connecting impulse lines at 90° to transmitter inlet ports), chemical and petrochemical (sample conditioning headers to instruments), power generation (gauge lines to pressure gauge connections), semiconductor manufacturing (gas panel instrument connections), food and beverage (hygienic instrument hook-ups), and shipbuilding (hydraulic panel instrument connections).

TES-LOK brand | 90° Compression Tube to Male Thread | SS 304 / SS 316 / Brass | 6000 PSI | ISO 9001:2015

1/16"–2" OD & 2–50 mm OD NPT · BSP · BSPT · UNF · ISO · SAE 150–400 °C ASTM D1710 / D3294

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SS 304 SS 316 Brass Special Alloys 90° Elbow Compression × Male Thread NPT BSP BSPT 6000 PSI Double Ferrule

TES-LOK Male Elbow Tube Fitting — 90° compression to male NPT/BSP thread

What is a Male Elbow Tube Fitting?

A male elbow tube fitting is a 90° compression tube fitting with two distinct ends: a tube compression end that grips the tube OD via a double-ferrule nut-and-ferrule set, and a male-threaded end (NPT, BSP, BSPT, or other standard) that screws directly into a female-threaded instrument port, valve body, manifold, or gauge connection. The 90° body angle allows the tubing to change direction at the connection point without requiring a separate elbow plus straight connector.

Tesco Steel manufactures male elbow tube fittings under the TES-LOK brand. They are one of the most common instrumentation fittings used globally — wherever a tube run must turn 90° to enter a pressure gauge, transmitter, or valve in a space-efficient manner. TES-LOK male elbows are dimensionally compatible with Swagelok, Parker A-LOK, and Ham-Let equivalents, allowing direct drop-in replacement.

Specifications

TES-LOK Male Elbow Tube Fitting — Technical Data
Brand	TES-LOK (Tesco Steel & Engineering)
Angle	90° (standard); 45° also available — see 45° Male Elbow
Tube End	Double-ferrule compression (front ferrule + back ferrule)
Thread End	Male NPT / BSP / BSPT / UNF / ISO / SAE
Fractional Tube OD	1/16" to 2" OD
Metric Tube OD	2 mm to 50 mm OD
Material Grades	SS 304 (1.4301), SS 316 (1.4401), Brass, Monel 400, Inconel 600, Hastelloy C-276, Titanium Gr. 2
Pressure Rating — SS	Up to 6000 PSI (413 bar)
Pressure Rating — Brass	300 PSI / 1000 PSI / 3000 PSI (size-dependent)
Temperature Range	150 °C to 400 °C
Standards	ASTM D1710, ASTM D3294
Surface Finish	Electropolished / Passivated / As-machined
Certifications	ISO 9001:2015; NABL-traceable MTRs available

Key Advantages

90° Space-Saving Turn

Changes tubing direction and makes the instrument connection in one fitting — no need for a separate elbow plus straight connector.

Direct Instrument Connection

Male thread end screws directly into gauges, transmitters, valve bodies, and manifold ports — the most common instrument hook-up scenario.

Leak-Tight Dual Seal

Double-ferrule metal-to-metal seat on the tube end; tapered thread seal (NPT/BSPT) or face-seal (BSP) on the thread end — two independent sealing mechanisms.

Brand Compatible

Dimensionally interchangeable with Swagelok, Parker A-LOK, and Ham-Let male elbows — direct drop-in replacement with no modification.

All Thread Standards

NPT, BSP, BSPT, UNF, ISO, SAE — one source for all regional instrument port thread requirements.

Alloy Options

SS 316 for chloride/marine service; Hastelloy C-276 and Monel 400 for acids, H₂S, and aggressive process media.

Male Elbow vs Other Elbow & Connector Types

Fitting Type	End 1	End 2	Angle	Best Use
Male Elbow	Compression tube	Male NPT/BSP thread	90°	Tube → female-threaded instrument/valve port at 90°
Female Elbow	Compression tube	Female NPT/BSP thread	90°	Tube → male stud/nipple at 90°
Union Elbow	Compression tube	Compression tube	90°	Tube → tube directional change, re-makeable both ends
45° Male Elbow	Compression tube	Male NPT/BSP thread	45°	Shallower turn to female-threaded port; less flow restriction
Street Elbow	Female thread	Male thread	90°	Threaded pipe-to-pipe 90° change (no compression tube)
Male Connector	Compression tube	Male NPT/BSP thread	Straight (0°)	Straight tube-to-female-threaded-port connection

Common Tube OD × Thread Size Combinations

Tube OD	Male Thread Size	Typical Instrument Port
1/4"	1/8" NPT / 1/8" BSP	Pressure gauge, transmitter, instrument valve
1/4"	1/4" NPT / 1/4" BSP	Pressure transmitter, manifold valve port
3/8"	1/4" NPT / 1/4" BSP	Flow transmitter impulse line
3/8"	3/8" NPT / 3/8" BSP	Larger gauge or control valve actuator
1/2"	1/2" NPT / 1/2" BSP	High-flow process tapping, control valve
6 mm (metric)	1/8" BSP	European instrument panel connections
10 mm (metric)	1/4" BSP / 1/4" BSPT	Metric tubing to BSP instrument port

Industries Served

Industry	Application	Preferred Material
Oil & Gas	Impulse lines from process tapping to pressure/differential transmitters at 90°; wellhead gauge connections	SS 316, Monel, Inconel
Chemical & Petrochemical	Analyzer sample conditioning — 90° connections to instrument ports on corrosive service lines	SS 316L, Hastelloy C-276
Power Generation	Boiler water chemistry instrument hook-ups; steam line pressure gauge connections	SS 316, Carbon Steel
Semiconductor	Gas panel instrument connections requiring 90° routing to mass flow controllers and pressure transducers	SS 316L EP
Food & Beverage	Hygienic pressure instrument connections on CIP-compatible process lines	SS 316L (3-A certified)
Shipbuilding & Offshore	Hydraulic and pneumatic panel instrument connections; deck-level gauge manifolds	SS 316, Cupro-Nickel

Frequently Asked Questions

What is a male elbow tube fitting?

A male elbow tube fitting is a 90° compression tube fitting with a double-ferrule compression end (gripping the tube OD) on one side and a male-threaded end (NPT, BSP, BSPT, etc.) on the other. It enables a tube run to change direction by 90° and connect directly to a female-threaded instrument port, pressure gauge, valve body, or manifold — in a single fitting with no additional elbow or nipple required.

How does a male elbow differ from a union elbow tube fitting?

A union elbow has compression tube ends on both sides — both ends grip a tube OD — so it joins two tube runs at 90°. A male elbow has a compression tube end on one side and a male NPT/BSP thread on the other — so it connects a tube run at 90° to a female-threaded instrument port. Use a union elbow for tube-to-tube direction changes; use a male elbow for tube-to-instrument-port connections.

What is the difference between a male elbow and a female elbow tube fitting?

A male elbow has an external (male) thread that screws into a female-threaded port — the most common scenario for connecting to pressure gauges, transmitters, and valve bodies. A female elbow has an internal (female) thread that accepts a male-threaded stud, nipple, or stem. The choice depends on the gender of the instrument or valve port being connected.

What thread standards are available for TES-LOK male elbow fittings?

TES-LOK male elbow tube fittings are available with NPT (ANSI/ASME B1.20.1), BSP/BSPP (ISO 228), BSPT (ISO 7), UNF (ANSI/ASME B1.1), ISO, and SAE thread forms — covering all major instrument port standards used globally.

What sizes and materials are available?

TES-LOK male elbow tube fittings are available with fractional tube ODs from 1/16" to 2" and metric tube ODs from 2 mm to 50 mm. Materials include SS 304, SS 316, Brass, Monel 400, Inconel 600, Hastelloy C-276, and Titanium Gr. 2. Multiple thread sizes are available per tube OD to match all common instrument port specifications.

What is the pressure rating of SS male elbow tube fittings?

SS 304 and SS 316 TES-LOK male elbow fittings are rated up to 6000 PSI (413 bar) on the tube-compression end. The male NPT or BSPT tapered thread end seals reliably with PTFE tape; BSP parallel threads use a face seal or bonded washer. Brass variants are rated 300–3000 PSI depending on tube OD.

Is the TES-LOK male elbow available in 45° as well as 90°?

Yes. In addition to the standard 90° male elbow, TES-LOK manufactures a 45° male elbow tube fitting for installations requiring a shallower directional change. The 45° variant reduces flow turbulence and bend stress, and is preferred in high-cycle, vibration-prone, or space-constrained instrument panel layouts.

What industries use male elbow tube fittings?

Male elbow tube fittings are one of the most universally used instrumentation fittings across oil and gas (impulse lines to pressure/differential transmitters), chemical and petrochemical (analyzer connections), power generation (boiler instrument hook-ups), semiconductor (gas panel routing), food and beverage (hygienic CIP-compatible connections), and shipbuilding (hydraulic panel gauges). Wherever a tube must turn 90° to reach an instrument port, a male elbow is the standard solution.

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ISO 9001:2015 certified | 90° compression-to-male-thread | SS 304 · SS 316 · Brass · Alloys | All thread standards | Fast global shipment

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