NAS549 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | Insulating washer |
| Material | Phenolic paper or fiber |
| Status | Check the current issue before design use. |
Part numbers
Sizes commonly stocked. The standard governs and may list others.
No. 63 part numbers
| Part no. | Material | Thickness T |
|---|---|---|
| NAS549F6 | Fiber | — |
| NAS549FL6 | Fiber | .031 |
| NAS549L6 | Phenolic paper | .031 |
No. 83 part numbers
| Part no. | Material | Thickness T |
|---|---|---|
| NAS549F8 | Fiber | — |
| NAS549FL8 | Fiber | .031 |
| NAS549L8 | Phenolic paper | .031 |
No. 103 part numbers
| Part no. | Material | Thickness T |
|---|---|---|
| NAS549F10 | Fiber | — |
| NAS549FL10 | Fiber | .031 |
| NAS549L10 | Phenolic paper | .031 |
Part number
What each code means
| Part | Meaning |
|---|---|
| Example | NAS549F6 — Fiber insulating washer for a No. 6 screw |
Notes from the standard
- Absence of F means phenolic paper; F after the base number means fiber insulation; L means .031 thickness. The thickness without L is not stated in the listing.
- 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
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Distributors coming soon.
Sources
- NAS549 — Washer, Non-Metallic, Insulating, Electrical — 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.