Specification
Where to buy| Item | Value |
|---|---|
| Type | Packing with backup retainer |
| Material | As the suffix letters state |
| Status | Check the current issue of the standard before design use. |
Part numbers
Part numbers and dimensions as tabulated. The standard governs and may list others.
#81 part number
| Part no. | O.D., in | Inside dia., in |
|---|---|---|
| NAS1523-08Y | .375 | .156 |
#105 part numbers
| Part no. | O.D., in | Inside dia., in |
|---|---|---|
| NAS1523-3R | .438 | .190 |
| NAS1523-3Y | .438 | .190 |
| NAS1523AA3R | .438 | .190 |
| NAS1523C3R | .438 | .190 |
| NAS1523C3Y | .438 | .190 |
1/46 part numbers
| Part no. | O.D., in | Inside dia., in |
|---|---|---|
| NAS1523-4R | .500 | .240 |
| NAS1523-4Y | .500 | .240 |
| NAS1523AA4R | .500 | .240 |
| NAS1523C4N | .500 | .240 |
| NAS1523C4R | .500 | .240 |
| NAS1523C4Y | .500 | .240 |
5/162 part numbers
| Part no. | O.D., in | Inside dia., in |
|---|---|---|
| NAS1523-5Y | .593 | .301 |
| NAS1523C5R | .593 | .301 |
Part number
What each code means
| Part | Meaning |
|---|---|
| Example | NAS1523-3R — steel retainer, fluorinated silicone, #10 screw |
Notes from the standard
- Suffix letters as the listing gives them. C after the base number: corrosion-resistant retainer; no letter (dash): steel retainer; AA after the base number: aluminum alloy retainer; R after the dash number: fluorinated silicone material per MIL-R-25988; Y after the dash number: Buna-N material per MIL-R-7362 Type I.
- The listing prints the #8 inside diameter as 156; the decimal point is added. N in C4N is not explained in the listing.
Where to buy
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Distributors coming soon.
Sources
- NAS1523 — Packing with Retainer — 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.