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NAS1580C3T4 Offset Screw Flush

Packaged Items
SinglePack of 5
NAS1580 Dash No.MaterialHeat TreatFinishGripLengthPart Number
C3T4Cres. (A-286)160,000 - 190,000 PSIPassivate Per Ams 27000.2500.613NAS1580C3T4

Overview

Offset Cruciform 100 Deg Flush Head

Material - Alloy Steel (8740) or Cres. (A-286)
Heat Treat - 160,000 - 180,000 or PSI 160,000 - 190,000 PSI
Finish - Cadmium Per AmsQQ-P-416 TYPE II or Passivate Per Ams 2700

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Please note, Aircraft Spruce Canada'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 Canada 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.

Q: Im looking for shear screws, and Im unsure between the NAS1580 and NAS 1581, could you tell me the difference between them? Or it could indicate a shear screw that is countersunk?

Both NAS1580 and NAS1581 are countersunk 100 degree, the NAS1581 has a reduced size head diameter. The NAS1580 will have a larger diameter head.

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