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NYLO SEAL FITTINGS 259-P CAP / 259-N INSERT (NYLON)

From $0.68 to $1.77
Tube OD A D Part Number Price Buy
1/40.3750.125
259-N04
$0.75
Quantity
3/80.5000.203
259-N06
$0.68
Quantity
1/40.500N/A
259-P04
$1.16
Quantity
3/80.563N/A
259-P06
$1.77
Quantity
Subtotal $0.00
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Overview

Nylo-Seal tube fittings are exceptionally strong. The bodies, made of nylon, are stronger than machined fittings of similar composition. They are furnished complete with nut/sleeve assemblies, made of acetal copolymer. Since the sleeve snaps into and is retained by the nut there is no fumbling for a loose sleeve. Just insert tube into the fitting and tighten the nut 2 to 2-1/2 full turns. Note: The most frequently used combination of tube and pipe sizes are 1/4" Tube x 1/8" Pipe and 3/8" Tube x1/4" Pipe.

For Nylo-Seal tubing, see "Accessories" tab

Less 10% on 50 pieces per size, Less 20% on 100 pieces per size

Reference Chart

259-P CAP,
259-N Insert (Nylon)

261-N Nut and
Sleeve Assembly

Tube O.D. A D
1/4 3/8 1/8
3/8 7/16 13/64
Tube O.D. Thd. A C
1/4 7/16-20 15/32 9/16
3/8 5/8-20 37/64 3/4

262-N Union

Tube O.D. A B C D E
1/4 1-25/64 63/64 5/8 7/32 15/32
3/8 1-21/32 1-1/4 13/16 23/64 19/32

264-N Union Tee

Tube O.D. A B D E
1/4 1-9/64 47/64 7/32 15/32
3/8 1-11/64 31/31 11/32 19/32

266-N Female Connector

Tube O.D. Pipe Thread A B C D E
1/4 1/8 1-9/64 15/16 9/16 7/32 9/16
1/4 1/4 1-5/16 1-7/64 11/16 7/32 47/64
3/8 1/4 1-27/64 1-7/32 11/16 11/32 3/4
3/8 3/8 1-27/64 1-7/32 13/16 11/32 3/4

265-N Elbow Union

Tube O.D. A B D E
1/4 1-1/64 13/16 7/32 3/8
3/8 1-5/32 15/16 11/32 7/16

268-N Male Connector

Tube O.D. Pipe Thd. A B C D E
1/4 1/8 1-13/64 1 5/8 15/64 15/32
1/4 1/4 1-25/64 1-3/16 5/8 15/64 11/16
3/8 1/4 1-17/32 1-21/64 13/16 5/16 19/32
3/8 3/8 1-19/32 1-25/64 13/16 11/32 19/32

269-N Male Elbow

Tube O.D. Pipe Thd. A B D E F
1/4 1/8 1-1/64 13/16 7/32 3/8 27/32
1/4 1/4 1-1/64 13/16 13/32 3/8 1-1/32
3/8 1/4 1-9/64 15/16 5/16 7/16 1-1/32
3/8 3/8 1-9/64 15/16 11/32 7/16 1-3/32

271-N Male Run Tee

Tube O.D. Pipe Thd. A B D E F
1/4 1/8 59/64 21/32 7/32 15/32 3/4
1/4 1/4 59/64 13/32 7/32 15/32 29/32
3/8 1/4 1-5/32 61/64 5/16 19/32 1-1/16
3/8 3/8 1-3/16 61/64 23/64 19/32 1-7/64

272-N Male Branch Tee

Tube O.D. Pipe Thd. A B D E F
1/4 1/8 15/16 47/64 7/32 15/32 3/4
1/4 1/4 15/16 47/64 7/32 15/32 13/16
3/8 1/4 1-11/64 31/32 5/16 19/32 1-1/16
3/8 3/8 1-11/64 31/32 23/64 19/32 1-7/64

282-N Bulkhead Union

Tube O.D. Pipe Thd. A B C D E F G
1/4 7/16-20 1-57/64 1-31/64 5/8 7/32 15/32 5/8 5/16
3/8 5/8-20 2-1/4 1-53/64 13/16 11/32 19/32 7/8 3/8
*Use 259N inserts w/all Poly-Flo tubing connections. Not needed w/ Nylo-Seal tubing.
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Reviews

These are back ordered, have not received a new shipping status.

Richard W
March 3, 2021

I made a mistake with the last rating, in fact Aircraft aircraft spruce has shipped the missing item so please accept my apology. Thank you for prompt shipping. Rich

Richard W
May 7, 2020

I got what I ordered, good job!

Lumanair A
January 24, 2020

took a little time to locate the insert, but was a correct fit. Staff very helpful

John W
October 21, 2019

White B Verified Purchase

NYLO-SEAL FITTINGS 259-N 04

September 26, 2021

These are necessary to properly use the Nylo-Seal tubing. Annoyingly expensive but you dont need very many.

Servomotive C Verified Purchase

NYLO-SEAL FITTINGS 259-N 04

June 19, 2021

Q&A

Please note, Aircraft Spruce Canada's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce Canada assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: In Nylo Seal Fittings, is the first fraction in the size column the pipe size or tube size? Example: 1/4 x 3/8

The first number in the size column refers to the tube OD, second number is the pipe thread. In your example, 1/4 tube OD x 3/8 pipe thread.

Q: Please tell me how to assemble when using a cap 259-P.

You would install a cap in a fitting where you would want to cap off the flow. Place the cap in the fitting and tighten the nut down.

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