NAS391 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | Finishing washer |
| Status | Check the current issue before design use. |
Part numbers
| Part no. | Size |
|---|---|
| NAS391B4P | No. 4 |
| NAS391B6P | No. 6 |
| NAS391B8P | No. 8 |
| NAS391B10P | No. 10 |
Sizes commonly stocked. The standard governs and may list others.
Part number
What each code means
| Part | Meaning |
|---|---|
| Example | NAS391B4P — For a No. 4 screw |
Notes from the standard
- Listed in the same box as NAS390, the flush type, with the same sizes.
- Part number written as the listing writes it; the standard governs the exact format.
- Approved data governs. Use the washer the SRM, drawing or IPC calls for.
Where to buy
AmericaDistributor coming soonOur partner for this region is on its way
EuropeDistributor coming soonOur partner for this region is on its way
OceaniaDistributor coming soonOur partner for this region is on its way
Distributors coming soon.
Sources
- NAS391 — Washer, Interior Finishing, Countersunk — 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.