What is the lifespan of these connectors?

Usally my hoses gets holes before the connectors give out.

These are for a 3/8" air line if that's what you're asking? The Fittings/couplers themselves are marked style "M"

Are these water tight?

I bought this pack from Harbor Freight specifically to use for water lines at residential pressure levels (my home is 90-120psi), and the connection was water tight for me.

Can these handle air and steam?

I do not know if they will handle steam. I bought them for use with an air compressor -up to 300 psi. I have had no problems with them. Make sure to use teflon tape on any threaded connections.

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Milton Colorfit Coupler & Plug Kit - (M-Style, Red) - 1/4" Npt, (14-Piece) - S-314Mkit

Product ID: 323156800

Details

Brand
Milton
Colour
Original
Item dimensions L x W x H
23 x 23 x 48
Material
Alloy Steel
Size
14 Piece

🎨Color-coded for easy line ID

🔧14-piece comprehensive kit

🛡️Scratch-resistant anodized steel

₨29690

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Description

🔴 Connect with confidence — the red-hot standard in air tool fittings!

COMPLETE 14 PIECE SET - Includes 6 male plugs, 4 female plugs, 2 male couplers, and 2 female couplers — everything you need in one kit.
COLOR CODED EFFICIENCY - Red fittings simplify air line identification, reducing errors and boosting workflow speed.
DURABLE ANODIZED STEEL BUILD - Engineered with scratch-resistant alloy steel for long-lasting performance beyond aluminum alternatives.
QUICK PUSH TO CONNECT DESIGN - Effortless and secure connections save time on every job, keeping you ahead of schedule.
UNIVERSAL M STYLE COMPATIBILITY - Seamlessly fits Milton and red competitor couplers/plugs for hassle-free integration.

The Milton Colorfit Coupler & Plug Kit (M-Style, Red) is a 14-piece set of 1/4" NPT air couplers and plugs designed for professional-grade durability and compatibility. Featuring scratch-resistant anodized alloy steel construction and color-coded red fittings, this kit ensures quick, secure connections and easy line identification. Perfect for managers and pros who demand reliability and efficiency in pneumatic tool setups.

Specifications

ASIN	B073R7GG98
ASIN	B073R7GG98
Best Sellers Rank	#30,236 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #38 in Air Tool Fittings
Brand Name	Milton
Color	Original Version
Connector Type	NPT
Customer Reviews	4.6 4.6 out of 5 stars (7,529)
Customer reviews	4.6 4.6 out of 5 stars (7,529)
Date First Available	13 July 2017
Exterior Finish	Aluminum
Global Trade Identification Number	00030937322579
Included Components	1 Milton Branded Product
Is Discontinued By Manufacturer	No
Item Dimensions	23 x 23 x 48 millimeters
Item Type Name	Milton S-314MKIT Kit, 14pc M style 1/4"
Item Weight	0.16 Pounds
Item model number	S-314MKIT
Manufacturer	Milton
Manufacturer	Milton
Manufacturer Part Number	S-314MKIT
Material Type	Alloy Steel Aluminum
Model Number	S-314MKIT
Number of Packs	1
Number of Pieces	14
Product Dimensions	2.29 x 2.29 x 4.83 cm; 72.57 g
Set Name	ColorFit by Milton
Size	14 Piece
Thread Size	0.25 inch
Thread Type	NPT
UPC	703570502607 370114735410 342192282933 374528297571 030937322579 604945364137 359627589628
Unit Count	1.0 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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₨29690

Duties & taxes included

In stock

Sold byAmazon Sri LankaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Sri Lanka.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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3 weeks ago

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