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Brass Adapter, 3/8-18 Female NPT To 1/4-18 Female NPT, Straight

Alternate Part Numbers Alternate Part Number C1HP19, Alternate Part Number FMC103-1754, Alternate Part Number MI-00333658, Alternate Part Number MINO-00925F73253	Application Grease, refrigeration, instrumentation and hydraulic systems. Fuel, LP and natural gas available on special order.	Brand Danfoss Power Solutions (II LLC Aeroquip)	Brand Aeroquip	Pack Size 1.00	UOM EA	End Gender 1 13553	End Gender 2 13555	End Size 1 0.25	End Size 2 0.38	End Type 1 NPTF	End Type 2 NPTF	L 1.16	Minimum Working Temperature -65	Supplier Part Number 3300X6X4	Thread 1 3/8-18	Thread 2 1/4-18	Thread Sealant No	Product Weight 0.12 lbs

Product Questions & Answers 2

Product Questions & Answers

trying to step down from 3/8 npt to 1/4 npt, is this the straight female to female piece?

Question by: Hank M on Nov 16, 2025, 6:53 AM

Function-wise, it is a reducer coupling that goes from 3/8-18 female NPT on one side to 1/4-18 female NPT on the other, and it’s a straight female-to-female adapter.

Answer by: Customer Support on Nov 17, 2025, 8:48 PM

Got a refrigeration line running 3/8 female NPT and need to step it down to 1/4 female NPT without any elbows or bends involved. This straight brass reducer gonna do the trick?

Question by: Bobby G on Dec 21, 2025, 11:20 AM

For a straight inline reduction from 3/8-18 female NPT down to 1/4-18 female NPT, that's exactly what this fitting is built to handle. Brass holds up well in refrigeration environments, and the straight configuration keeps your line routing clean without introducing any directional change. The minimum rated temperature of -65F also gives you solid headroom for typical refrigeration operating conditions.

Answer by: Customer Support on Dec 22, 2025, 3:01 PM

Similar Products

Model Number	Thread 1	Thread 2	L
3300X4X2	1/4-18	1/8-27	0.96
3300X6X4	3/8-18	1/4-18	1.16
3300X8X6	1/2-14	3/8-18	1.38