| Part No. | Thread Size | 
|---|---|
| MS27151-24 | 1/2-20 | 
| MS27151 engine       nuts replace AC356 Pal nuts. They are stamped from 1050 spring     steel and cadmium plated per QQ-P-416A, Type II, Class 3 Less 20% for quantity 100/Part No. | 
Had trouble finding these elsewhere, but they are exactly what I was looking for!
Nut, Pal RF122000-214EQ (Pack Of 10)
5 stars, 100% as advertised and promptly shipped...thank you!!
Nut, Pal RF122000-214EQ
The 5/16-24 nuts also work well on 5/16-18 studs (such as Lycoming carb mounting).
Just what I needed at the right price and super fast service .
Please note, Aircraft Spruce Australia's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce Australia assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.