Auto-Lok Nuts Cross Reference
Yes. Anemo Engineering can produce Auto-Lok Nuts alternatives for MS21043 self-locking nuts, including ALNsbMJ A286 options with UNJC and UNJF threads per MIL-S-8879.
MS21043 alternative nuts in A286 stainless steel
When an MS21043 self-locking nut is difficult to source, an Auto-Lok self-locking nut can be produced as an alternative. These distorted-thread flange nuts are designed for demanding assemblies where reliable locking performance, corrosion resistance and high-temperature capability are important.
The options below are made from corrosion-resistant A286 stainless steel. A286 is stronger than 316 stainless steel and can withstand temperatures up to 800°F, while also resisting chemicals such as bleach and chlorine.
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MS21043 to Auto-Lok Nuts cross-reference
Use this table to find the Auto-Lok ALNsbMJ A286 part that corresponds to your MS21043 reference.
| MS Part | Thread | Auto-Lok Nuts alternative |
|---|---|---|
| MS21043-04 | 4-40 UNJC-3B | ALNsbMJ0440A286 |
| MS21043-06 | 6-32 UNJC-3B | ALNsbMJ0632A286 |
| MS21043-08 | 8-32 UNJC-3B | ALNsbMJ0832A286 |
| MS21043-3 | 10-32 UNJF-3B | ALNsbMJ1032A286 |
| MS21043-4 | 1/4-28 UNJF-3B | ALNsbMJ4282A286 |
| MS21043-5 | 5/16-24 UNJF-3B | ALNsbMJ52432A286 |
| MS21043-6 | 3/8-24 UNJF-3B | ALNsbMJ624A286 |
Why choose an Auto-Lok alternative?
Auto-Lok Nuts can support applications where a reliable self-locking nut is required and the original MS part is unavailable, obsolete or subject to long lead times.
- Distorted-thread self-locking flange nut design
- UNJC and UNJF internal thread options
- A286 stainless steel for strength, corrosion resistance and high-temperature service
- Factory-new parts with certificate of quality and certificate of conformity available
Before ordering
Please confirm your application requirements before replacing an MS21043 part. Our team can help review the thread size, material, certification needs and documentation required for your project.