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3/16"/4.75mm Tubing and Nuts

Cunifer is seamless, copper nickel alloy DOT approved brake line used for OEM and replacement brake lines, fuel lines, power steering and cooling lines.
Corrosion proof and easy to install high pressure hydraulic tubing for the harshest environments.

All of our tubing conforms to hydraulic brake tubing specifications SAE J1650, DIN 74234 and BS 2871.

Save money when you buy tubing packages!

Here's a sample of what our customers have to say about Cunifer brake line:

Dear FedHill:
I felt compelled to write and say thanks for the great product and service. The order process was easy
and the shipping time extremely fast. As a commercial snowplow company, we’ve learned the necessity of
having brake repair supplies in stock at all times. Thanks to FedHill we have had 100% uptime and no brake
related failures at all this season. Your product is so easy to install, my mechanics are doing preventive
maintenance on brake lines, something that was never done before. In short, your product has made my business easier to run and more profitable in one easy step. Thanks for providing a great product.

King’s Home Service

All nuts are steel except where followed by ss (stainless steel) or br (brass)

Nuts will vary in color.

The part number indicates the tube size.
-3 is 3/16", -4 is 1/4", -5 is 5/16", -6 is 3/8" , -8 is 1/2"


Save money when you buy nut packs!



Shops, Wholesale, Schools and Military Personnel - Call for pricing
Displaying products 1 - 51 of 51 results
CNF-3
CNF-3
Price: $54.95
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3/16/4.75mm OD tubing x 25 foot coil
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CNF-3A
Price: $32.48
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3/16/4.75mm OD tubing x 12 foot coil
T1
T1
Price: $99.90
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2 coils of 3/16"/4.75mm OD tubing x 25 foot (save $10.00)
T3
T3
Price: $89.93
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1 coil of 3/16"/4.75mm OD tubing x 25 foot and 1/2 coil of 1/4" Od tubing x 12 foot coil (save $10.00)
T4
T4
Price: $122.53
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1 coil of 3/16"/4.75mm OD tubing x 25 foot, 1/2 coil of 1/4" OD tubing x 12 foot, #2, and a #4 nut pack (save $10.00)
A1-3
A1-3
Price: $1.00
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3/8 x 24 unf male fully threaded steel nut, SAE (double) flare, .562” long.
#8 Nut Pack
#8 Nut Pack
Price: $6.00
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12 pack of A1-3 Standard American brake line nut for 3/16" (save 50%)
#1 Nut Pack
#1 Nut Pack
Price: $11.00
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American nut pack, SAE (double) flare for 3/16” tube (17 pieces): commonly used nuts for American cars (save 50% off individual nut prices)
#2 Nut Pack
#2 Nut Pack
Price: $15.75
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Nut pack, SAE (double) flare/American w/master cylinder nuts for 3/16” (20 pieces) (save 50% off individual nut prices)
A1L-3
A1L-3
Price: $1.50
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3/8 x 24 unf male fully threaded steel nut, SAE (double) flare, .808” long. Long style nut.
A1-3ss
A1-3ss
Price: $6.00
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3/8 x 24 unf male fully threaded nut, SAE (double) flare, .562” long.
A12-3
A12-3
Price: $2.00
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7/16 x 24 tpi male fully threaded steel nut, SAE (double) flare, .550” long.
#12 Nut Pack
#12 Nut Pack
Price: $6.00
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Late Model Fullsize Ford Trucks Enter Here!

6 pack of A12-3 Common American master cylinder nut for 3/16" (save 50%)
A13-3
A13-3
Price: $2.50
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1/2 x 20 unf male fully threaded steel nut, SAE (double) flare, .600” long.
A14-3
A14-3
Price: $3.50
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9/16 x 18 unf male fully threaded steel nut, SAE (double) flare, .600” long.
#5 Nut Pack
#5 Nut Pack
Price: $10.00
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SAE (double) flare/American master cylinder nuts for 3/16" and 1/4" brake line (7 pieces): (save 50% off individual nut prices)
A15-3
A15-3
Price: $4.00
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Mopar/Chrysler only. 1/2 x 20 unf male steel nut with non threaded lead, SAE (double) flare, .755” long.
A16-3
A16-3
Price: $4.00
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Mopar/Chrysler only. 9/16 x 20 tpi male steel nut with non threaded lead, SAE (double) flare, .750” long.
AD1br
AD1br
Price: $3.00
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3/8 x 24 unf female SAE (double) flare to male 1/8” pipe thread, .700” long
AD2br
AD2br
Price: $5.20
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7/16 x 24 male SAE to 3/8 x 24 female SAE
Adapt 3/16" line to 1/4" line SAE (double) flare brass
AD3br
AD3br
Price: $5.50
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3/8 x 24 male SAE to 7/16 x 24 female SAE
Adapt 1/4" line to 3/16" line SAE (double) flare brass
UA1-3br
UA1-3br
Price: $3.00
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3/8 x 24 unf female union, brass, SAE (double) flare, .630” long.
TA1-3br
TA1-3br
Price: $8.00
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3/8 x 24 unf female tee, brass, SAE (double) flare.
#20 Nut Assortment
#20 Nut Assortment
Price: $68.05
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Master SAE/American nut asst. for 3/16” & 1/4” brake line (58 pieces):(save over 50% off individual nut prices)
M1-3
M1-3
Price: $2.00
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10mmx 1.0 Fine thread, male steel nut with non threaded lead, SAE (double) and DIN (bubble) flare, 17mm long.
#13 Nut Pack
#13 Nut Pack
Price: $12.00
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12 pack of M1-3 Standard European brake line nut for 3/16" (save 50%)
#6 Nut Pack
#6 Nut Pack
Price: $18.75
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European nut pack, SAE (double) or DIN (bubble) metric for 3/16” tube (15 pieces): (save 50% off individual nut prices)
M1L-3
M1L-3
Price: $2.00
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10mm x 1.0 Fine thread, male steel nut with non threaded lead, SAE (double) and DIN (bubble) flare, 23mm long. Long style.
M3-3
M3-3
Price: $3.00
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10mm x 1.0 Fine thread, female steel nut, SAE (double) flare, 16mm long.
M4-3
M4-3
Price: $2.50
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10mm x 1.25 Course thread, male steel nut with non threaded lead, SAE (double) and DIN (bubble) flare, 19mm long.
M5-3
M5-3
Price: $2.00
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10mm x 1.0 Fine thread, male, fully threaded, steel nut, SAE (double) flare, 16mm long.
#18 Nut Pack
#18 Nut Pack
Price: $12.00
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12 pack of M5-3 Standard Asian brake line nut for 3/16" (save 50%)
 #7 Nut Pack
#7 Nut Pack
Price: $22.00
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SAE (double) flare/Asian metric for 3/16” tube (17 pieces): (save 50% off individual nut prices)
M5L-3
M5L-3
Price: $2.50
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10mm x 1.0 male fully threaded steel nut, no lead, SAE (double) flare, 21mm long. Standard Asian, long style.
M6-3
M6-3
Price: $3.00
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12mm x 1.0 male steel nut with non threaded lead, SAE (double) and DIN (bubble) flare, 20mm long. standard European master cylinder nut.
#15 Nut Pack
#15 Nut Pack
Price: $6.00
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4 pack of M6-3 Common European master cylinder nut for 3/16" (save 50%)
M7L-3
M7L-3
Price: $2.50
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10mm x 1.25 male fully threaded steel nut, SAE (double) flare, 20mm long. Some vintage Asian applications. Kawasaki
M10-3
M10-3
Price: $4.00
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11mm x 1.5 male steel nut with non threaded lead, DIN (bubble) flare, 17mm long.
M11-3
M11-3
Price: $7.00
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13mm x 1.5 male steel nut with non threaded lead, DIN (bubble) flare, 18mm long.
M14-3
M14-3
Price: $6.00
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12mm x 1.0 female 20mm overall
UM13-3
UM13-3
Price: $6.00
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10mm x 1.0, SAE (double) flare, 30mm long.
UM14-3
UM14-3
Price: $7.50
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10mm x 1.0, DIN (bubble) flare, 26mm long.
UM15-3-4br
UM15-3-4br
Price: $16.00
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12mm x 1.0 DIN (bubble) flare, 33mm long.
UM16-3br
UM16-3br
Price: $9.00
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10mm x 1.0 SAE (double) flare, 26mm long.
TM18-3
TM18-3
Price: $20.00
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10mm x 1.0 DIN (bubble) flare. European, metric, 3 way female tee
TM19-3
TM19-3
Price: $22.00
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10mm x 1.0 DIN (bubble) flare. European, metric, 4 way female tee.
#21 Nut Assortment
#21 Nut Assortment
Price: $94.75
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Master metric nut asst. for 3/16” & 1/4” brake line (57 pieces): (save over 50% off individual nut prices)
AN816-3
AN816-3
Price: $8.00
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3/8 x 24 unf, 1/8 male pipe thread to male 37 degree steel Adaptor 1.00” long.
AN818-3
AN818-3
Price: $3.50
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3/8 x 24 unf female steel nut .600” long
AN819-3
AN819-3
Price: $2.00
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steel sleeve .400” long
AN822-3
AN822-3
Price: $12.00
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3/8 x 24 unf x 1/8npt 90 degree elbow
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