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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S-314MKIT ColorFit Coupler & Plug Kit - (M-Style, Red) - 1/4" NPT, (14-Piece)

Product ID: 46718669

Details

Brand
Milton
Color
Original
Connector Type
Coupling Plug
Exterior Finish
Aluminum
Item Weight
2.56 ounces
Item dimensions L x W x H
0.9 x 0.9 x

🔴Color-coded for easy line ID

⚙️Universal 1/4" NPT compatibility

🛡️Durable anodized steel sleeves

481 DH

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Sold byAmazon MoroccoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Connect with confidence — color your workflow red-hot!

BUILT TO LAST - Scratch-resistant anodized steel sleeves ensure your kit stays pristine through heavy use.
COLOR CODED PRECISION - Red-to-red matching eliminates costly air line mix-ups and boosts workflow efficiency.
COMPLETE 14 PIECE KIT - Everything you need in one compact set to streamline your pneumatic tool connections.
SEAMLESS COMPATIBILITY - Works flawlessly with Milton and competitor M-style couplers and plugs for ultimate versatility.
PRESSURE READY PERFORMANCE - Rated up to 300 PSI, engineered for demanding industrial and professional applications.

The Milton S-314MKIT is a 14-piece M-Style pneumatic coupler and plug kit featuring anodized red aluminum and durable steel sleeves. Designed for easy color-coded matching to prevent air line cross-contamination, it supports 1/4" NPT threaded connections compatible with Milton and competitor M-style fittings. Rated for up to 300 PSI, this kit combines durability, precision, and versatility to optimize industrial and professional air tool setups.

Specifications

ASIN	B073R7GG98
Best Sellers Rank	#9,996 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3 in Air Tool Fittings
Brand Name	Milton
Color	Original Version
Connector Type	Coupling, Plug
Customer Reviews	4.6 4.6 out of 5 stars (7,748)
Exterior Finish	Aluminum
Global Trade Identification Number	00030937322579
Included Components	1 Milton Branded Product
Item Dimensions	0.9 x 0.9 x 1.9 inches
Item Type Name	Milton S-314MKIT Kit, 14pc M style 1/4"
Item Weight	2.56 ounces
Manufacturer	Milton
Manufacturer Part Number	S-314MKIT
Manufacturer Warranty Description	One Year Limited
Material Type	Alloy Steel, Aluminum
Model Number	S-314MKIT
Number of Packs	1
Number of Pieces	14
Set Name	Milton S-314MKIT 14-Piece Kit
Size	14 Piece
Thread Type	NPT
UPC	703570502607 370114735410 342192282933 374528297571 030937322579 604945364137 359627589628
Unit Count	1 Count

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