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 S-314MKIT Kit, 14pc M Style 1/4", Original Version, 14 Piece

Milton S-314MKIT Kit, 14pc M Style 1/4", Original Version, 14 Piece

Product ID: 115876460

Details

Brand
Milton
Colour
Original
Connector type
NPT
Exterior finish
Aluminium
Item dimensions L x W x H
23 x 23 x 48
Item weight
73 g

🔴Color-coded for easy line ID

⚙️14-piece comprehensive kit

🛡️Durable anodized steel sleeves

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€ 35.21

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Elevate your air tool game with Milton’s color-coded, steel-strong quick connects!

BUILT TO LAST - Scratch-resistant anodized steel sleeves ensure your couplers stay pristine through heavy use.
COLOR CODED PRECISION - Red-to-red matching eliminates costly air line mix-ups and boosts workflow efficiency.
COMPLETE 14 PIECE SET - Includes 6 male plugs, 4 female plugs, 2 male couplers, and 2 female couplers—everything you need in one kit.
UNIVERSAL COMPATIBILITY - Works seamlessly with Milton and competitor M-style couplers and plugs for ultimate flexibility.
PRESSURE READY PERFORMANCE - Rated for up to 300 PSI, engineered for reliable, high-pressure pneumatic 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 line identification and compatibility with Milton and competitor M-style fittings, it supports up to 300 PSI for professional-grade compressed air applications.

Specifications

ASIN	B073R7GG98
Best Sellers Rank	104,736 in DIY & Tools ( See Top 100 in DIY & Tools ) 377 in Air Tool Accessories
Brand	Milton
Colour	Original Version
Connector Type	NPT
Country of Origin	China
Customer Reviews	4.6 4.6 out of 5 stars (7,478)
Exterior Finish	Aluminium
Global Trade Identification Number	00030937322579
Included Components	1 Milton Branded Product
Item Dimensions	23 x 23 x 48 millimetres
Item Type Name	Milton S-314MKIT Kit, 14pc M style 1/4"
Item Weight	73 g
Manufacturer	Milton
Material	Alloy Steel Aluminum
Model Number	S-314MKIT
Number of Pieces	14
Part Number	S-314MKIT
Size	14 Piece
Thread Size	0.25 inch
Thread Type	NPT
UPC	703570502607 370114735410 342192282933 374528297571 030937322579 604945364137 359627589628
Unit Count	2 Coupler and plug kit

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