304 Stainless Steel Reducing Bush Adaptor | Male to Female NPT Pipe Fitting

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304 Stainless Steel Reducing Bush Adaptor | Male to Female NPT Pipe Fitting

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Size: 1&8 " x 3&8"

Qty (pcs): 1

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$2.57 USD

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304 Stainless Steel Reducing Bush Adaptor — Reliable Male-to-Female Pipe Reduction

When your plumbing, pneumatic, or hydraulic system calls for stepping down from a larger pipe to a smaller one, a loose fit or mismatched thread can mean leaks, pressure loss, or costly rework. These 304 stainless steel male-to-female reducing bush adaptors are built for DIYers, contractors, and maintenance professionals who need a dependable, corrosion-resistant solution the first time.

Each reducing bush features a hex-body design machined from 304 stainless steel, with a male (external) thread on the outer body and a female (internal) thread on the bore. Available in a wide range of size combinations from 1/8" up to 4" (3.18mm–101.6mm), with quantity options of 1, 2, 3, or 5 pieces per order to suit single repairs or multi-point installations.

Typical use cases include residential and commercial plumbing step-down connections, compressed air line reductions for pneumatic tools, irrigation manifold fittings, and industrial fluid transfer systems where a male-to-female reducing bush adaptor is needed to join pipes of different diameters.

⚠️ Thread standard is typically NPT. If your system uses BSP or metric threads, please confirm compatibility before ordering.

🔗 Compatible with standard NPT-threaded pipe systems. Suitable for water, air, and hydraulic fluid applications. Size range: 1/8" to 4" male × female combinations.

✅ Key Features of These Stainless Steel Reducing Bush Adaptors

🔩Hex-Body Design — The wrench-flat hex body allows secure tightening with a standard pipe wrench or adjustable spanner, reducing the risk of slippage during installation of male-to-female reducing bush adaptors.
🛡️304 Stainless Steel Construction — Resists rust, oxidation, and mild chemical exposure, making these fittings suitable for both indoor plumbing and outdoor pipe reduction applications where carbon steel would corrode.
📐Wide Size Range — Available from 1/8" × 1/4" up to 3" × 4", covering the most common step-down combinations used in residential, commercial, and light industrial pipe systems.
🔄Tapered Thread Engagement — NPT-style tapered threads create a progressively tighter seal as the fitting is tightened, minimizing leak paths when used with PTFE tape or thread sealant.
📦Flexible Quantity Options — Order 1, 2, 3, or 5 pieces per size to match your project scope, whether it's a single repair or a multi-outlet manifold installation requiring several reducing bush adaptors.
🏭Consistent Machined Tolerances — Each fitting is machined to consistent thread tolerances, helping ensure repeatable assembly across multiple connection points without excessive hand-fitting or adjustment.

📐 Technical Specifications — Stainless Steel Reducing Bush Adaptors

Product Type	Male-to-Female Reducing Bush Adaptor
Material	304 Stainless Steel
Thread Type	NPT (National Pipe Taper) — typically; confirm for BSP systems
Size Range (Male × Female)	1/8" × 1/4" up to 3" × 4" (see variant options)
Body Style	Hex body for wrench engagement
Finish	Brushed / natural stainless steel
Quantity per Order	1, 2, 3, or 5 pieces (select variant)
Pressure Rating	Typically up to 150 PSI for water/air at ambient temperature
Temperature Range	Generally suitable for -20°F to 400°F (-29°C to 204°C)
Compatible Media	Water, air, hydraulic fluid (contact us to confirm for other media)
Country of Origin	See variant options
Corrosion Resistance	Good — suitable for outdoor and light marine environments

❓ Frequently Asked Questions

How do I choose the right size reducing bush adaptor?

Match the male (outer) thread to your pipe's existing female port, and the female (inner) thread to the smaller pipe or fitting you're connecting. For example, a 1/2" × 1/4" bush has a 1/2" male thread and a 1/4" female thread. Always measure thread OD with calipers before ordering — nominal pipe sizes refer to bore diameter, not actual thread OD.

What thread standard do these reducing bushes use?

These adaptors generally follow NPT (National Pipe Taper) thread standards, which are the most common in US plumbing and pneumatic systems. If your system uses BSP threads, please contact us to confirm compatibility before ordering.

Are these reducing bushes suitable for outdoor or marine use?

Yes. 304 stainless steel offers good corrosion resistance in most outdoor environments. For highly corrosive or saltwater marine applications, 316 stainless steel is typically recommended. These fittings are suitable for general outdoor plumbing, irrigation, and light marine use.

What pressure rating can I expect from these fittings?

304 stainless steel pipe fittings generally handle pressures up to 150 PSI for standard water and air applications, though actual ratings depend on size, temperature, and the media being conveyed. Always verify with your system's pressure requirements before installation.

Do I need thread sealant with these adaptors?

Yes. For leak-free connections, apply PTFE thread tape (Teflon tape) or a compatible pipe thread sealant to the male threads before assembly. This is standard practice for tapered NPT fittings and helps prevent galling on stainless steel threads.

Can these be used for gas lines?

These fittings are generally used for water, air, and hydraulic fluid applications. For gas line use, consult local codes and a licensed professional, as gas applications typically require fittings that are specifically rated and certified for that purpose.

How do I convert the size dimensions from inches to mm?

Multiply inches by 25.4 to get millimeters. For example: 1/4" = 6.35mm, 1/2" = 12.7mm (≈0.5"), 3/4" = 19.05mm (≈0.75"), 1" = 25.4mm. Note that pipe thread nominal sizes refer to bore diameter, not the actual thread OD — so a "1/2 inch" fitting will have a larger physical thread diameter than 12.7mm.

🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.

304 Stainless Steel Reducing Bush Adaptor | Male to Female NPT Pipe Fitting

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304 Stainless Steel Reducing Bush Adaptor — Reliable Male-to-Female Pipe Reduction

✅ Key Features of These Stainless Steel Reducing Bush Adaptors

📐 Technical Specifications — Stainless Steel Reducing Bush Adaptors

❓ Frequently Asked Questions

304 Stainless Steel Reducing Bush Adaptor | Male to Female NPT Pipe Fitting

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