Boeing MS51865-1 Nut, Self-Lock

Military Standards

Part # MS51865-1

The MS51865-1 self-locking nut ensures secure fastening with a nominal height of 0.340 inches and features a prevailing torque design. Suitable for high temps (up to 250°F), it's crafted from steel with a 2B thread class. Its robust construction offers excellent corrosion resistance and durability.
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Overview

The MS51865-1 self-locking nut is engineered for secure fastening across a range of applications. With a nominal height of 0.340 inches, this nut features a prevailing torque design that can be all-metal or include a nonmetallic insert, enhancing its locking capability. Constructed from steel, this cap-style nut has a nominal thread size of 0.138 inches and a thread class of 2B, ensuring a reliable fit with a thread quantity of 32 per inch. Rated for temperatures up to 250 degrees Fahrenheit, it is suitable for high-temperature environments. The width across flats ranges from 0.302 inches to 0.312 inches, and its chamfered bearing surface has a finish of 110 microinches. The surface treatment includes cadmium overall, except for the insert, and chromate overall, except for the insert, providing excellent corrosion resistance. With a right-hand thread direction and a maximum hardness rating of 28 Rockwell C, this nut is designed for durability and performance in demanding conditions.

Features & Benefits

Features
  • Prevailing torque design for excellent locking capability.
  • Temperature rating of 250 degrees Fahrenheit for high-temperature applications.
  • Chamfered bearing surface with excellent corrosion resistance.
Benefits
  • Ensures secure fastening in several environments.
  • Durable construction suitable for demanding applications.
  • Reduces the risk of loosening under vibration or thermal expansion.

Technical Information

NIIN

010228113

NSN

5310-01-022-8113

FSCG

5310

FSCG Category

Nuts and Washers

UNSPSC Code

31161716

UNSPSC Category

Locknuts

Lead Time (Days)

306

Certification Status

CERTIFIED

ATA Part Number

MS51865-1

CAGE Code

96906

Commercial Part

Yes

Harmonized Tariff Schedule Code

7318160085

Repairable

No

Specification Part Number

MS51865-1

Supplier Part Number

MS51865-1

Landing Gear Part

No

Leasable

No

Returnable

No

Aircraft Makes

Boeing

Aircraft Models

737NG
747-400
767
777
747-8
727
4 more

Shipping Details

ITAR Compliant

No

Part Explosive

No

ECCN

EAR99

Dry Ice

No
Buy now from
Commercial Spares
DISCLAIMER: Product information provided “as is.” Boeing may add, change, discontinue or remove this information at any time. Product photos may not be exact match to product delivered. See terms & conditions.