MS21299 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | Flat washer |
| Status | Check the current issue before design use. |
Part numbers
Sizes commonly stocked. The standard governs and may list others.
.19002 part numbers
| Part no. | Type | A, outside dia. | B, inside dia. | C, csk. dia. |
|---|---|---|---|---|
| MS21299-3 | Plain | .382 | .193 | — |
| MS21299C3 | Countersunk | .382 | .193 | .285 |
.25002 part numbers
| Part no. | Type | A, outside dia. | B, inside dia. | C, csk. dia. |
|---|---|---|---|---|
| MS21299-4 | Plain | .486 | .253 | — |
| MS21299C4 | Countersunk | .486 | .253 | .345 |
.31252 part numbers
| Part no. | Type | A, outside dia. | B, inside dia. | C, csk. dia. |
|---|---|---|---|---|
| MS21299-5 | Plain | .593 | .316 | — |
| MS21299C5 | Countersunk | .593 | .316 | .407 |
.37502 part numbers
| Part no. | Type | A, outside dia. | B, inside dia. | C, csk. dia. |
|---|---|---|---|---|
| MS21299-6 | Plain | .707 | .378 | — |
| MS21299C6 | Countersunk | .707 | .378 | .502 |
Part number
What each code means
| Part | Meaning |
|---|---|
| Example | MS21299C3 — Countersunk washer, .1900 nominal size |
Notes from the standard
- Countersunk washer: 45°; thickness .057 to .069 in both types.
- 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
- MS21299 — Washer, 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.