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#20 MORB X #24 FP (RIGID)

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Description & Features

This straight steel fitting features a #20 Male SAE O-Ring Boss (MORB) thread on one end and a #24 Female NPSM thread on the other.

The #20 MORB X #24 FP (RIGID) fitting conforms to SAE J514 standards for the MORB connection and SAE J476 for the NPSM connection. It has an overall length of 2.300 mm. The O-ring seal is made of NBR.

SKU: 6405-20-24-O

Supplier Part Number (MPN): 6405-20-24-O

Alternate Part Numbers: 2216-20-24S, 6405-20-24, A2216-24-20S, C1BX61

Specifications

Connection Size 1
1-1/4 in
Connection Size 2
1-1/2 in
Connection Type
FNPT, Male SAE ORB
Connection Type 1
Male SAE ORB
Connection Type 2
FNPTF
Dimension Standards
SAE J1926, SAE J476, SAE J514
Dimensions
2.3 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
2.38 in
Material
Steel
Material Construction
12L14/C1045 Steel
Operating Temperature
-40 to 250 deg F
Seal Material
NBR
Series
6405-O Series
Thread 2 Drill Dimensions
1.5 in
Thread B1 Drill Dimensions
1.078 in
Thread Size
1-5/8-12 x 1-1/2-11-1/2

Product Questions & Answers (1)

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Question by: Jimmy W on Sep 29, 2025, 8:14 PM
thread on the female end is NPSM, not NPT, does that matter for how it seals up?
Answer by: Customer Support on Sep 30, 2025, 8:56 PM
NPSM is a straight mechanical thread, so it relies on a mating fitting or surface to create the seal rather than thread taper the way NPT does. NPT threads are tapered and generate a seal through thread interference, which is a different sealing method entirely. If your port or hose end is NPT, this fitting won't give you a proper seal. Make sure the female side of your connection is also NPSM before ordering.

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