Can this be used with hydraulic oil? Is the seal compatible?

Probably not. You have to use Teflon tape to seal the pipe threads on the inside. If your hydraulic oil is that very low pressure then you can probably use it under 100 psi. The very nature of a hose barb and or a pipe thread is very low pressure liquid. Take note

will a female 1" npt valve fit on the outside threads?

No. The outside thread is not a pipe thread first of all. Second of all it’s a reverse thread, so it doesn’t even go in the same direction. the nut is that same reverse thread

What is the size of the included silicone gasket?

Going to give you the specs in metric. 4mm thick, 38mm OD, 30mm ID

will a female 1" npt valve fit on the outside threads?

no,the outside thread is a lefthand yhread.

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SSBF010 Stainless Steel Bulkhead Fitting (Female 3/4" NPT/FIP, Left Handed Nut, w/Step Gasket) (2 pack)

SSBF010 Stainless Steel Bulkhead Fitting (Female 3/4" NPT/FIP, Left Handed Nut, w/Step Gasket) (2 pack)

Product ID: 141020627

Details

Brand
RAINPAL
Color
SS304 Steel
Connector Type
Flange
Exterior Finish
Stainless
Item Weight
0.21 Kilograms
Item dimensions L x W x H
1.1 x 1.65 x

🔩Dual female 3/4" NPT threads

🧰Solid 304 stainless steel build

🛠️Left-handed nut for smooth install

Description

🔧 Upgrade your plumbing game with precision-engineered bulkhead fittings!

COMPACT COMPATIBLE - Fits walls up to 8mm thick with a 1-1/4" hole—perfect for professional-grade projects
STEP GASKET INCLUDED - Enhanced sealing for leak-proof performance under pressure
LEFT HANDED NUT DESIGN - Reverse threading ensures hassle-free, secure installation every time
PREMIUM 304 STAINLESS STEEL - Durable, corrosion-resistant construction built to last
DUAL FEMALE 3 4 NPT THREADS - Seamless connection on both sides for versatile plumbing setups

The RAINPAL SSBF010 Stainless Steel Bulkhead Fitting is a robust, dual female 3/4" NPT threaded connector featuring a left-handed nut for easy installation and a step gasket for superior sealing. Crafted from corrosion-resistant 304 stainless steel, this 2-pack fits walls up to 8mm thick and requires a 1-1/4" diameter hole, making it ideal for professional plumbing and industrial applications.

Specifications

ASIN	B07P7WPG3X
Best Sellers Rank	#197,257 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #18 in Compression Fitting Nuts
Brand Name	RAINPAL
Color	SS304 Steel
Connector Type	Flange
Customer Reviews	4.4 4.4 out of 5 stars (99)
Exterior Finish	Stainless Steel
Included Components	Step Gasket
Item Dimensions	1.1 x 1.65 x 1.65 inches
Item Weight	0.21 Kilograms
Manufacturer	RAINPAL
Manufacturer Part Number	SSBF010
Material Type	Stainless Steel
Model Number	SSBF010
Number of Pieces	2
Set Name	RAINPAL SSBF010 Stainless Steel Bulkhead Fitting
Size	3/4 inch
Thread Type	NPT
Unit Count	2.0 Count

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