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

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Description & Features

This steel bulkhead locknut is part of the Eaton Aeroquip 210212 series. Designed as a spare part, this bulkhead nut ensures secure connections in hydraulic systems.

With dimensions A at 0.41 and B at 1.38, the Eaton Aeroquip steel bulkhead locknut is manufactured to meet demanding hydraulic application requirements. For fluid compatibility information, please refer to the linked document.

SKU: 210212-12S

Supplier Part Number (MPN): 210212-12S

Alternate Part Numbers: C1BB81, MI-00317880, MINO-00015F64778

Specifications

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

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Product Questions & Answers (2)

Question by: Brent P on Jan 24, 2026, 5:13 PM
What size thread does this bulkhead locknut fit?
Answer by: Customer Support on Jan 26, 2026, 7:41 AM
This bulkhead locknut fits a 1-1/16 - 12 thread.
Question by: Norm A on Dec 18, 2025, 3:47 PM
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
Answer by: Customer Support on Dec 20, 2025, 6:36 AM
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.