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Bspp Bulkhead Locknut

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Description & Features

Manufactured in steel, this G 3/8-19 BSPP Bulkhead Locknut is designed to secure bulkhead fittings through panels, brackets, and enclosures in hydraulic and fluid power systems. The female BSPP thread on the G 3/8 side provides a standardized connection point suited to metric-compatible hydraulic circuits.

At 22mm across the wrench flats and 7mm in length, this compact component from Adaptall is well suited to installations where space is limited. Its steel construction provides the durability expected in industrial hydraulic assemblies.

SKU: 9041-06

Supplier Part Number (MPN): 9041-06

Specifications

Brand
adapt-all
Connection Size 1
3/8 in
Connection Type
Female BSP
Connection Type 1
Female BSPP 60 deg Flare
Dimension Standards
BS 5200, ISO 1179, ISO 8434-6
Dimensions
5.5 mm L
Finish
Zinc-Plated
Fitting Type
Locknut
Hex Size
22 mm
Material
Steel
Material Construction
Carbon Steel
Series
9041 Series
Thread Size
3/8-19

Product Questions & Answers (3)

Question by: Dwight H on Dec 1, 2025, 9:37 PM
i’ve got a bulkhead fitting going through a thin panel, is this the kind of nut that locks it down on the backside?
Answer by: Customer Support on Dec 3, 2025, 2:41 PM
Made for securing bulkhead fittings through panels, brackets, and enclosures, this locknut gives you a solid way to clamp the fitting in place so it does not work loose in a hydraulic or fluid power setup.
Question by: Travis P on Jul 30, 2025, 12:44 PM
What size wrench do I need for this locknut?
Answer by: Customer Support on Jul 31, 2025, 3:01 PM
This locknut takes a 22mm wrench.
Question by: Randy C on Jan 23, 2026, 3:59 PM
Got a panel I'm running some hydraulic lines through and need to lock down the bulkhead fitting real good. This the right kind of nut for that?
Answer by: Customer Support on Jan 25, 2026, 6:21 AM
For securing a bulkhead fitting through a panel or bracket, yeah, this is exactly what you're after. It threads onto the fitting from the backside and clamps everything tight against the panel surface. The female G 3/8-19 BSPP thread matches up with standard 3/8 BSPP bulkhead fittings, so if your fitting is sized and threaded to match, this locknut will do the job.

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