NAS1587 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | Flat washer, high temperature |
| Status | Check the current issue before design use. |
Part numbers
| Part no. | Size | A, outside dia. | B, inside dia. | C, csk. dia. | D, thickness csk. | T, thickness plain |
|---|---|---|---|---|---|---|
| NAS1587A3C | .1900 | .469 | .195 | .270 | .062 | — |
| NAS1587-3 | .1900 | .469 | .195 | — | — | .032 |
| NAS1587-4 | .2500 | .531 | .256 | .339 | .078 | .062 |
| NAS1587-5 | .3125 | .593 | .320 | .401 | .078 | .062 |
| NAS1587-6 | .3750 | .687 | .383 | .489 | .078 | .062 |
| NAS1587-7 | .4375 | .781 | .446 | .550 | .078 | .062 |
| NAS1587-8 | .5000 | .875 | .509 | .612 | .078 | .062 |
Sizes commonly stocked. The standard governs and may list others.
Part number
What each code means
| Part | Meaning |
|---|---|
| Example | NAS1587-4 — Plain washer for the .2500 thread size |
Notes from the standard
- Dash number designates thread size. C after the dash number: countersunk. L after the dash number: plain light washer, thickness half of T.
- T does not apply to the countersunk washer; D does not apply to the plain washer.
- 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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Sources
- NAS1587 — Washer, High Temperature (1200 °F), Plain and 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.