NAS679 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | Self-locking nut |
| Material | Steel (A) or A286 corrosion-resistant steel (C) |
| Status | Check the current issue of the standard before design use. |
Dimensions by size
| Dimension, in | .1120-40 | .1380-32 | .1640-32 | .1900-32 | .2500-28 | .3125-24 | .3750-24 | .4375-20 |
|---|---|---|---|---|---|---|---|---|
| A — Height, max | .125 | .188 | .188 | .188 | .219 | .266 | .282 | .328 |
| B max — Across flats, max | .252 | .314 | .346 | .377 | .439 | .502 | .564 | .690 |
| B min — Across flats, min | .240 | .302 | .334 | .365 | .430 | .492 | .553 | .679 |
| C — Across corners, ref | .289 | .361 | .390 | .430 | .506 | .580 | .650 | .790 |
Dimensions in inches, as tabulated for the part. Blank cells (—): not stated in the documents we hold; take them from the standard.
Part numbers
Part numbers as listed for the part; the standard governs and may list others.
.1120-403 part numbers
| Part no. | Version |
|---|---|
| NAS679A04 | Steel, 450 °F |
| NAS679C04M | A286 CRES, 450 °F, dry-film lubricant |
| NAS679C04 | A286 CRES, 800 °F, silver plated |
.1380-323 part numbers
| Part no. | Version |
|---|---|
| NAS679A06 | Steel, 450 °F |
| NAS679C06M | A286 CRES, 450 °F, dry-film lubricant |
| NAS679C06 | A286 CRES, 800 °F, silver plated |
.1640-323 part numbers
| Part no. | Version |
|---|---|
| NAS679A08 | Steel, 450 °F |
| NAS679C08M | A286 CRES, 450 °F, dry-film lubricant |
| NAS679C08 | A286 CRES, 800 °F, silver plated |
.1900-323 part numbers
| Part no. | Version |
|---|---|
| NAS679A3 | Steel, 450 °F |
| NAS679C3M | A286 CRES, 450 °F, dry-film lubricant |
| NAS679C3 | A286 CRES, 800 °F, silver plated |
.2500-283 part numbers
| Part no. | Version |
|---|---|
| NAS679A4 | Steel, 450 °F |
| NAS679C4M | A286 CRES, 450 °F, dry-film lubricant |
| NAS679C4 | A286 CRES, 800 °F, silver plated |
.3125-243 part numbers
| Part no. | Version |
|---|---|
| NAS679A5 | Steel, 450 °F |
| NAS679C5M | A286 CRES, 450 °F, dry-film lubricant |
| NAS679C5 | A286 CRES, 800 °F, silver plated |
Part number
What each code means
| Part | Meaning |
|---|---|
| Example | NAS679A4 — Steel, 1/4-28, all-metal low-height hexagon nut, 450 °F |
Notes from the standard
- Letter after the base number: A is all metal; C is A286 CRES, silver plated for 800 °F use; M is dry-film lubricant for 450 °F use; W is an internal wrenching feature.
- The W suffix is listed on the sizes 4-40 to 1/4-28 (A04W, A06W, A08W, A3W, A4W); 5/16-24 and 3/8-24 and 7/16-20 are listed without it.
- NAS679C (A286 CRES hexagon nut, 450 °F dry-film lubricant, silver plated for 800 °F, internal wrenching feature on some sizes) is listed as: 6-32 C06M; 8-32 C08M, C08MW; 10-32 C3MW, C3W; 1/4-28 C4MW, C4W; 5/16-24 C5.
- Washer face, chamfer or radius optional (drawing). Column letters as on the drawing: A height, B across flats, C across corners (ref).
- Part number format as commonly written; check the standard for the exact format.
- Approved data governs. Use the nut the SRM, drawing or IPC calls for.
Where to buy
AmericaDistributor coming soonOur partner for this region is on its way
EuropeDistributor coming soonOur partner for this region is on its way
OceaniaDistributor coming soonOur partner for this region is on its way
Distributors coming soon.
Sources
- NAS679 — Nut, Self-Locking, Hexagon, Low Height, Steel and A286 CRES — 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.