Name: McMaster 44705K922 Low-Pressure 6061 Aluminum Pipe Adapter, 1-1/4 NPT Female x Butt-Weld, Class 150 (sub for 44705K322 — NOT MIL-DTL-52618 certified)
SKU: SK0027744-US20260630-101428
Availability: InStock

In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications. To prevent cracking, do not tighten more than a 1/4-turn past hand tight.

Threaded Fitting Connection — Threaded female x butt weld straight adapters are also known as half couplings.

Note: This is McMaster’s suggested substitute for 44705K322 (discontinued). 44705K922 is 31/32″ long vs 1″ on K322, and does NOT meet MIL-DTL-52618.

Pressure Rating	Low Pressure
Shape	Straight
Fitting Type	Adapter
Fitting Connection	NPT Female × Butt Weld
Pipe Size A	1 1/4″
Pipe Size B	1 1/4″
Pressure Class	150
Material	6061 Aluminum
Maximum Pressure @ Temperature	150 psi @ 72°F
Length	31/32″
Wall Thickness	0.234″
Threading	Threaded on One End
Construction (B)	Welded
For Pipe Schedule	40
For Use With	Air, Oil, Water
Performance	Corrosion Resistant
Specifications Met	ASME B1.20.1, ASTM A865, ASTM B221
System of Measurement	Inch
Country of Origin	United States
DFARS Compliance	Specialty Metals COTS-Exempt
ECCN	EAR99
REACH Compliance	REACH (EC 1907/2006) (02/04/2026, 253 SVHC) Compliant
RoHS Compliance	RoHS 3 (2015/863/EU) Compliant
Schedule B Number	7609.00.0000
USMCA Qualifying	Yes

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