NAS1394 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | Threaded insert, lightweight, key locked |
| Material | Alloy steel (dash) or corrosion-resistant steel (C) |
| Status | Check the current issue before design use. |
Part numbers
Part numbers commonly stocked. The standard governs and may list others.
.1640-322 part numbers
| Part no. | External thread | Length, in |
|---|---|---|
| NAS1394C08 | .2500-20 | .250 |
| NAS1394C08L | .2500-20 | .250 |
.1900-322 part numbers
| Part no. | External thread | Length, in |
|---|---|---|
| NAS1394C3 | .3125-18 | .3125 |
| NAS1394C3L | .3125-18 | .3125 |
.2500-282 part numbers
| Part no. | External thread | Length, in |
|---|---|---|
| NAS1394C4 | .3750-16 | .375 |
| NAS1394C4L | .3750-16 | .375 |
.3125-242 part numbers
| Part no. | External thread | Length, in |
|---|---|---|
| NAS1394C5 | .4375-14 | .4375 |
| NAS1394C5L | .4375-14 | .4375 |
Part number
What each code means
| Part | Meaning |
|---|---|
| C | Letter: Corrosion-resistant steel (a dash in its place: alloy steel) |
| L | Letter: After the dash number: self-locking |
| Example | NAS1394C3L — Corrosion-resistant steel, self-locking, .1900-32 internal thread |
Notes from the standard
- The size column is the internal thread; the external thread and length are those of the listing.
- A dash in place of C indicates alloy steel; add L after the dash number for self-locking.
Where to buy
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Sources
- NAS1394 — Insert, Lightweight, Self-Locking and Non Self-Locking, Threaded Metal — nominal sizes and part numbers.
Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.