Aircraft Fastener Specs: NAS1801_12
Aircraft-grade fastener specifications and structural allowables — AN series airframe bolts (AN3-AN12), MS20470 solid rivets (2117-T4 AD and 2024-T4 DD), Hi-Lok pins (HL10 titanium protruding shear, HL19 steel flush), Lockbolt HLB, and NAS1801 hex machine screws. Single-shear allowable loads per MIL-HDBK-5J/MMPDS-11 Chapter 8.
| fastener type | diameter in | Ftu ksi (ksi) | grip range in | head style | hole size nom in (in) | material | notes | shear allowable lbs (lbs) | tensile allowable lbs (lbs) | thread | torque max inlb (in-lb) | torque min inlb (in-lb) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NAS1801_12 | 0.375 | 160 | 0-1.500 | Hex Head | 0.376 | Alloy Steel | NAS hex head machine screw 3/8 diameter | 10,500 | 13,000 | 3/8-24 UNF-3A | 210 | 160 |
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