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Milton S-684-4 1/4" MNPT Male Tank Valve, includes Protective Caps (Pack of 2)

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4.7 1,944 ratings

Amazon's Choice

$9.11

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Purchase options and add-ons

Material	Brass
Brand	Milton
Item dimensions L x W x H	2 x 1 x 1 inches
Exterior Finish	Plastic
Inlet Connection Type	National Pipe Tapered
Outlet Connection Type	MNPT
Number of Ports	2

About this item

Prevents Air from Leaking: This handy tank valve helps prevent the loss of air when filling vessels with an air compressor
Dimensions: Overall length including the plastic cap is 1.5”. The cap thread size is .305-32
Maximum Air Pressure of 200 PSI: To ensure safe use of this tank valve, it is recommended that the air pressure be kept at a maximum of 200 PSI
NPT: This tank valve has a 1/4" male national pipe thread
#1 Source for Quality Air Accessories: Since 1943, Milton has been providing quality accessories to the Automotive, Industrial, Hardware, Agriculture, Heavy-Duty Fleet and MRO markets
Milton is your number 1 source for Quality Air Accessories
Since 1943 Milton has been producing Quality Air Accessories
Milton covers automotive, industrial, hardware, agriculture, heavy-duty fleet and MRO markets

› See more product details

Customer ratings by feature

Easy to install

4.7

Accuracy

4.6

Value for money

4.5

See all reviews

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Milton S-684-4 1/4" MNPT Male Tank Valve, includes Protective Caps (Pack of 2)

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From the manufacturer


BRASS TANK VALVES 1/4" FNTP		CAP THREAD: 305-32

Product information

Technical Details

Material

‎Brass

Brand

‎Milton

Item dimensions L x W x H

‎2 x 1 x 1 inches

Exterior Finish

‎Plastic

Inlet Connection Type

‎National Pipe Tapered

Outlet Connection Type

‎MNPT

Number of Ports

‎2

Manufacturer

‎Milton

Part Number

‎S-684-4

Item Weight

‎0.8 ounces

Product Dimensions

‎2 x 1 x 1 inches

Country of Origin

‎USA

Item model number

‎s-684-4

Is Discontinued By Manufacturer

‎No

Size

‎Pack of 2

Item Package Quantity

‎1

Number Of Pieces

‎1

Number of Handles

‎1

Measurement System

‎Inch

Special Features

‎INCLUDES: Standard valve core and plastic cap. Overall length (with cap): 1.5 inch.- DESIGNED: For use with air compressor tanks to fill vessels with air.- IDEAL: Tank valve prevents air from leaking out while allowing for air to pass through for inflation.- NPT: 1/4" Male national pipe thread. Cap thread size: .305-32.- MAXIMUM AIR PRESSURE: 200 pounds per square inch (PSI).- - - -

Included Components

‎1 Milton Branded Product

Batteries Included?

‎No

Batteries Required?

‎No

National Stock Number

‎4820-01-443-1916

Additional Information

ASIN

B001PLI4BA

Customer Reviews

4.7 1,944 ratings

4.7 out of 5 stars

Best Sellers Rank

#28,326 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement)
#42 in Air-Compressor Accessories

Date First Available

December 3, 2007

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.

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Product Description

Our Milton 1/4" MNPT tank valves are made to be used with an air compressor to prevent air from leaking out when filling vessels. A standard core valve and plastic cap are included giving the product an overall length of 1.5”. Do not exceed 200 PSI when using this tank valve.

WARNING: California’s Proposition 65

Compare with similar items

	This Item Milton S-684-4 1/4" MNPT Male Tank Valve, includes Protective Caps (Pack of 2)	Recommendations Breezliy 4PCS 1/4" NPT Tank Valve Anti-Corrosion Brass Schrader Valve with Standard Valve Core with 1/4'' NPT Male,Using with Air Compressor Tanks with Sealing Caps	dummy QPINGH Tank Valve, 2pcs Schrader Valve Standard Valve Core with 1/4''NPT Male Threads for Air Compressor Tanks	dummy Breezliy 1/4" Inflation Schrader Valve with Push to Connect for 1/4" OD Air Line Tubing and Air Spring Suspension for Semi Truck Trailer Tractor	dummy Milton 1094-4 1/4" Ball Valve	dummy Milton S-684 1/8" NPT Tank Valve - Pack of 2
	Try again! Details Added to Cart spCSRF_Control	Try again! Details Added to Cart spCSRF_Control	Try again! Details Added to Cart spCSRF_Control	Try again! Details Added to Cart spCSRF_Control	Try again! Details Added to Cart spCSRF_Control	Try again! Details Added to Cart spCSRF_Control
Price	$9.11	$7.99	$5.99	$6.98	$22.86	$7.14
Delivery	Get it as soon as Friday, May 24	Get it as soon as Friday, May 24	Get it as soon as Friday, May 24	Get it as soon as Friday, May 24	Get it Jun 26 - 28	Get it as soon as Friday, May 24
Customer Ratings	4.71,944	4.4310	4.616	4.4310	5.01	4.7278
Easy to install	4.7	4.2	—	4.2	—	—
Accuracy	4.6	3.8	—	3.8	—	—
Value for money	4.5	3.7	—	3.7	—	—
Sold By	Amazon.com	Luckapple	QPINGH	Luckapple	Crimp Supply Inc	Amazon.com
material	Brass	Brass	Brass	Brass	brass, steel	Brass
inlet type	National Pipe Tapered	National Pipe Tapered	—	National Pipe Tapered	Full port	National Pipe Tapered
outlet type	MNPT	MNPT	MNPT	MNPT	FNPT	MNPT
exterior finish	Plastic	Brass	Brass	Brass	Brass	—

Customer reviews

4.7 out of 5

1,944 global ratings

How customer reviews and ratings work

Customers say

Customers like the quality, value, ease of use, and fit of the valve. For example, they mention it works well, is easy to install, and is a cheaper alternative to buying a compressor. That said, opinions are mixed on leakage.

AI-generated from the text of customer reviews

125 customers mention125 positive0 negative

Customers are satisfied with the quality of the valve. For example, they mention it's an excellent product, works well, and is of high quality. Some say the machining is very clean and precise.

"This is a good value, and works as expected." Read more

"...Get these and you don't have to worry about it. Well made, fit perfectly, superb quality. A bit of tape, and no Leaks whatsoever...." Read more

"Good quality item." Read more

"...Still good quality but would be better is it was made in usa like milton used to be..." Read more

18 customers mention18 positive0 negative

Customers appreciate the value of the valve. They say it's a great alternative to buying a compressor and a super deal on valve stem fittings.

"This is a good value, and works as expected." Read more

"...This was a cheaper alternative to buying a compressor and works really really well! The picture attached to my review isy set up...." Read more

"...I cut off one barb. Other than that it’s a great value purchase." Read more

"Nice valve for a nice price ! Needed this to replace a leaking valve on my holding tank for my well. Good quality and well made ...." Read more

15 customers mention12 positive3 negative

Customers like the fit of the valve. They say it's an excellent fit and quality, and it fits perfectly. Some customers also mention that the valve is well built and has solid brass solid fittings. Overall, most are satisfied with the fit and functionality of the product.

"...Get these and you don't have to worry about it. Well made, fit perfectly, superb quality. A bit of tape, and no Leaks whatsoever...." Read more

"...Holds are tight, no leaks with the gas line tape used and this adapter. So after filling my tires and airbags I clip it right off. Perfect...." Read more

"...Superior quality and fit. These fittings are no exception - they're great!" Read more

"The only issue I had is that the barn was too long. I cut off one barb. Other than that it’s a great value purchase." Read more

6 customers mention6 positive0 negative

Customers find the valve easy to install and use. They also say it has no problem holding 125 psi and is much easier to use now.

"...It holds pressure perfectly and was easy to install. It seems to be made well and should last...." Read more

"...Much easier to use now. Highly recommended. High quality brass and no leaks...." Read more

"Use to pre-fill an on board air tank. Easy to install, Has no problem holding 125 p.s.i.." Read more

"Nice easy Positive on time purchase" Read more

24 customers mention14 positive10 negative

Customers are mixed about the leakage of the valve. Some mention that it's well machined and has good tolerances, while others say that it leaks.

"...Well made, fit perfectly, superb quality. A bit of tape, and no Leaks whatsoever...." Read more

"...Immediately I started noticing that we had what appeared to be a slow leak down to around 25 PSI and then it stopped and held...." Read more

"...Holds are tight, no leaks with the gas line tape used and this adapter. So after filling my tires and airbags I clip it right off. Perfect...." Read more

"...Replaced broken filling valve on portable air tank. Works well. No leaks, holds pressure. I recommend." Read more

6 customers mention3 positive3 negative

Customers are mixed about the pressure capacity of the valve. Some mention that it holds pressure perfectly, and provides an accurate read on pressure. Others say that it does not hold pressure.

"This works exactly as advertised! It holds pressure perfectly and was easy to install. It seems to be made well and should last...." Read more

"...Does not hold pressure and leaks water out the inflation port. Perhaps I got a bad one" Read more

"...No leaks, tool provides very accurate read on pressure, no air escapes upon removal of the chuck." Read more

"Doesn't hold pressure. Pressure leaked at about 100psi and stopped leaking at about 90." Read more

6 customers mention3 positive3 negative

Customers have mixed opinions about the thread of the valve. Some mention that the threads are clean and cut cleanly, while others say that it is not perfect NPT and is not a pipe thread.

"...Very quality product from Milton, very thick brass, no burs on the threads, and the Schrader valve comes pre-installed with a black plastic valve..." Read more

"...The thread is straight, not tapered. this means that it will not seal properly." Read more

"Threads are clean and fits as expected. No issues" Read more

"The NPT threads are too fine. None of my NPT chucks will thread more than a single revolution...." Read more

Reviews with images

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Top reviews from the United States

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Dave R

Nice quality adapter

Reviewed in the United States on April 26, 2024

Size: Pack of 2Verified Purchase

This is a good value, and works as expected.

Helpful

Sean

An Absolute Necessity

Reviewed in the United States on January 22, 2024

Size: Pack of 2Verified Purchase

Air Tanks and Tires always seem to use different connections 🙄 Gee, I wonder why that is? Get these and you don't have to worry about it. Well made, fit perfectly, superb quality. A bit of tape, and no Leaks whatsoever.

Helpful

Brandon

Works great with air chuck

Reviewed in the United States on January 20, 2024

Size: Pack of 2Verified Purchase

Ordered this with the jaco lightning air chuck and it works great with my dewalt DCC020IB. Used some teflon tape on both sides of threads to ensure no leaks and have been satisfied with it so far.

Helpful

Amazon Customer

Nice item

Reviewed in the United States on February 16, 2024

Size: Pack of 2Verified Purchase

Good quality item.

Helpful

Amazon Customer

Good quality but made in taiwan

Reviewed in the United States on November 30, 2022

Size: Pack of 2Verified Purchase

Listing says country of origin usa but says made in Taiwan on package. Still good quality but would be better is it was made in usa like milton used to be...

3 people found this helpful

Helpful

eddie zackery

What I liked about it they were brass and fit well

Reviewed in the United States on March 31, 2024

Size: Pack of 2Verified Purchase

They were perfect for my application

Helpful

Cole N.

Used as adapter for Dewalt and AstroAl chuck- perfect

Reviewed in the United States on March 7, 2020

Size: Pack of 2Verified Purchase

Used this Milton 1/4” NPT tank valve and an Astro Al closed air chuck on a Dewalt DCC020I 20v air compressor (with LA-CO yellow has lime tape) and love it. The screw on/off connector of the Dewalt is awesome and will last longer. But for the airbags on the back of my truck screwing it off would drop the PSI a few and I was getting tired of that. I used this adapter to fit the AstroAl chuck to those Dewalt threads I’m happy with that. With the chuck not on a valve stem, if I turn the compressor on it’ll build to the set PSI fast and stop. Holds are tight, no leaks with the gas line tape used and this adapter. So after filling my tires and airbags I clip it right off. Perfect. Only down side is I then press the chuck stem against the screw of my rock tamer mud flaps to release the air from the Dewalt air compressor Line (otherwise the line still has pressure and is stiff), and this adapter has such good tolerances no air leaks). But it keeps everything right at the level I set it to be. All parts are perfect fits and hold great. A buddy and I put Firestone ride right airbags on his truck a few days ago, and he loved my Dewalt air compressor (he has tons of dewalt 20v stuff already and got me turned to Dewalt). So when he gets his I’ll be giving him the second air chuck and the second Milton 1/4” NPT tank valve.