NAS1993 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | 100° reduced head bolt |
| Status | Check the current issue before design use. |
Dimensions by size
| Dimension, in | .1900-32 |
|---|---|
| Thread | .1900-32 |
Thread as stated for the standard. Head and shank dimensions are not shown here: take them from the standard.
Part numbers
Part numbers commonly stocked, with grip and length. The standard governs and may list others.
.1900-328 part numbers
| Part no. | Grip, in | Length, in |
|---|---|---|
| NAS1993-2T | .125 | .463 |
| NAS1993-C2T | .125 | .463 |
| NAS1993-3T | .188 | .526 |
| NAS1993-C3T | .188 | .526 |
| NAS1993-4T | .250 | .588 |
| NAS1993-C4T | .250 | .588 |
| NAS1993-C4PT | .250 | .588 |
| NAS1993-5T | .312 | .650 |
Part number
What each code means
| Part | Meaning |
|---|---|
| Format | NAS1993-<dash> |
| C | Suffix: Corrosion resistant |
| P | Suffix: Aluminum coating |
| Example | NAS1993-2T — 100° reduced head bolt, .1900-32 thread, grip .125, length .463 |
Notes from the standard
- T: Torq-Set recess. Add C for corrosion resistant; add P for aluminum coating.
- Part number format as commonly written; check the standard for the exact format.
- Approved data governs. Use the bolt the SRM, drawing or IPC calls for.
Where to buy
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Sources
- NAS1993 — Bolt, 100° Reduced Head, Torq-Set Recess — 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.