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Steel Bulkhead Locknut, 1-1/16 - 12 Thread

A 0.41	Alternate Part Numbers Alternate Part Number C1BB81, Alternate Part Number MI-00317880, Alternate Part Number MINO-00015F64778	B 1.38	Brand Danfoss Power Solutions (II LLC Aeroquip)	Brand Aeroquip	Pack Size 1.00	UOM EA	Finish None	Materials Carbon steel	Series 210212	Supplier Part Number 210212-12S	Thread 2 1-1/16 - 12	Thread Sealant No	Tube O.D. 0.75	Tube O.D. 0.75	Type Locknut	Product Weight 0.09 lbs

Product Questions & Answers 2

Product Questions & Answers

What size thread does this bulkhead locknut fit?

Question by: Brent P on Jan 24, 2026, 5:13 PM

This bulkhead locknut fits a 1-1/16 - 12 thread.

Answer by: Customer Support on Jan 26, 2026, 7:41 AM

is this the right locknut for a 1-1/16-12 thread bulkhead fitting? trying to match up a spare part on a Danfoss unit we got in the shop

Question by: Norm A on Dec 18, 2025, 3:47 PM

Yeah, that's exactly what this is built for. It's part of the Eaton Aeroquip 210212 series and carries catalog number C1BB81, so if your Danfoss or Eaton unit calls out that series, this nut is the correct spare. The thread spec is 1-1/16-12, and the dimensions come in at 0.41 for A and 1.38 for B, so double-check those against what you're replacing before you torque it down.

Answer by: Customer Support on Dec 20, 2025, 6:36 AM

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