Aluminum Fill Caps | McMaster-Carr

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6 Products

Diesel Fuel Tank Caps


	Fuel Caps with Vent

Often used with trailers, compressors, and other equipment tanks, these caps meet Department of Transportation requirements. Caps have fusible plugs that will melt when the outside environment reaches their opening temperature.

Fuel Caps with Vent—Cap with vent will automatically open when the internal pressure reaches between 6.5 psi to 8.5 psi to relieve pressure.

	Pipe Size	Gender	Opening Temp., ° F	Specs. Met	Message		Each
Aluminum







	Fuel Caps

	8"	6 1/2"	Buna-N	2	Female	190	D.O.T. Compliant 49 CFR 393.67	Diesel Fuel Only	1805N1	000000




			Fuel Caps with Vent

			6"	4 1/2"	Buna-N	2	Female	255	D.O.T. Compliant 49 CFR 393.67	Diesel Fuel Only	1805N2	00000

Lockable Breather Vents with Cap

Secure access to vented openings in pipe and tanks—the cap can be locked to prevent tampering. These breather vents allow you to add a filling port to your hydraulic tank while protecting against excess pressure and vacuum. Use them to stop debris from entering your tank. Breather vents mount on top of standard tank openings with included hardware. Padlock is not included.

Threaded NPT Male

Aluminum Body

	Max. Pressure	Max. Temp., ° F	Ht.	Dia.	For Use With	Cap Material	Screen Material	For Max. Padlock Shackle Dia.		Each
Aluminum Body and Fitting



	2	Not Rated	200	4 1/2"	5 5/8"	Air, Oil, Water	Aluminum	Stainless Steel	3/8"	4906K11	000000

Washdown Weather Resistant Breather Vents

These breather vents are rated NEMA 6 to withstand periodic submersion in water. Install them in enclosures to stop the buildup of pressure and vacuum and to prevent debris from entering equipment. Breather vents can be used with enclosures that are rated NEMA 4, 12, and 13 for washdown environments and splashing oil and coolant.

Threaded UNF Male

Aluminum

Body

	Max. Flow Rate @ Pressure	Max. Pressure, psi	Max. Temp., ° F	Ht.	Dia.	For Use With	Environment	Enclosure Rating	O-Ring Material	Removes Particle Size Down To, μm		Each
Aluminum Body and Fitting



	10-32	Not Rated	1.4	158	1/4"	3/8"	Air	Dusty, Outdoor, Submersible, Washdown, Wet	NEMA 6	EPDM	3	1226T15	000000

Threaded Metric Male

Aluminum

Body

	Max. Flow Rate @ Pressure	Max. Pressure, psi	Max. Temp., ° F	Ht.	Dia.	For Use With	Environment	Enclosure Rating	O-Ring Material	Removes Particle Size Down To, μm		Each
Aluminum Body and Fitting



	M8	Not Rated	1.4	158	9/16"	9/16"	Air	Dusty, Outdoor, Submersible, Washdown, Wet	NEMA 6	EPDM	3	1226T14	000000


	M20	Not Rated	1.4	158	1"	1 1/8"	Air	Dusty, Outdoor, Submersible, Washdown, Wet	NEMA 6	EPDM	1	1226T17	00000