My 10+ year old s-715 hisses, even after installing new s-727 plugs. does the very small o-ring in this s-715 eventually wear out?

Yes, orings can get old and less plyable so they will not seal as well

is this for high pressure propane on an RV tank?

The model number S-715 will be an air style fitting. The maximum pressure will be 300 PSI.

Mine says made in USA on packaging. Nothing listed on the part itself. I like mine, purchased several and all work good. Would buy again.

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Milton S-715-4 1/4" FNPT M Style Coupler - Pack of 4

Milton S-715-4 1/4" FNPT M Style Coupler - Pack of 4

Product ID: 56503360

Details

Brand
Milton
Color
Gold
Connector Type
Coupling
Exterior Finish
Brass
Item Weight
3.84 ounces
Item dimensions L x W x H
4.75 x 4 x 1.5

💨40 SCFM optimal airflow

🔥250°F max temperature rating

🔩1/4" FNPT precision threading

MX$1062

Duties & taxes included

In stock

Sold byAmazon MexicoDelivered 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 Mexico.

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Description

🔧 Connect with confidence — the pro’s choice for flawless airflow!

HEAVY DUTY BRASS BUILD - Durable, corrosion-resistant with a premium gold finish
HIGH PRESSURE ENDURANCE - Handles up to 300 PSI for demanding air tool setups
EFFORTLESS QUICK CONNECT - Easy to apply and remove for maximum workflow efficiency
TRUSTED USA MADE QUALITY - Buna-N seal ensures flawless performance backed by a 1-year warranty
PRECISION 1 4 FNPT THREADING - Seamless, leak-proof connections every time

The Milton S-715-4 1/4" FNPT M Style Coupler pack of 4 offers precision brass construction with a durable Buna-N seal, supporting up to 300 PSI and 40 SCFM airflow at temperatures up to 250°F. Designed for quick, leak-free connections, this USA-made coupler is a top-rated, reliable solution for professional pneumatic tool setups.

Specifications

ASIN	B00YJ8PDJW
Best Sellers Rank	#14,251 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #10 in Air Tool Fittings
Brand Name	Milton
Color	Gold
Connector Type	Coupling
Customer Reviews	4.6 4.6 out of 5 stars (1,934)
Exterior Finish	Brass
Global Trade Identification Number	00030937314246
Included Components	Milton S-715-4 1/4" FNPT M Style Coupler - Pack of 4
Item Dimensions	4.75 x 4 x 1.5 inches
Item Type Name	Milton S-715-4 1/4" FNPT M Style Coupler - Pack of 4
Item Weight	3.84 ounces
Manufacturer	Milton
Manufacturer Part Number	S-715-4
Manufacturer Warranty Description	1-Year Limited Warranty
Material Type	Brass
Model Number	S-715-4
Number of Pieces	4
Set Name	Milton 1/4" FNPT M Style Coupler Set (Pack of 4)
Size	1/4 inch (Pack of 4)
Thread Type	NPT
UPC	030937314246
Unit Count	1 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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Great price for an authentic product. Fast international shipping too!

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MX$1062

Duties & taxes included

In stock

Sold byAmazon MexicoDelivered 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 Mexico.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

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Very reliable shop with genuine products. Will definitely buy again!

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