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NAS686A04
Two Lug Locknut Plate
Description
Thread Size: 7/64", Nut Length: 15/16", Nut Height: 11/64"
Specifications
| Center To Center Distance Between Mounting Holes Along Length | 0.686 inches minimum and 0.690 inches maximum |
|---|---|
| Distance From Aperture Center To Mounting Hole Center | 0.339 inches minimum and 0.349 inches maximum |
| Features Provided | Floating nut |
| Hardness Rating | 49.0 rockwell c maximum |
| Locking Feature | Prevailing torque all metal design |
| Lubrication | Dry film lubricant |
| Material | Steel |
| Mounting Hole Arrangement Style | 2 holes |
| Mounting Hole Diameter | 0.098 inches minimum and 0.103 inches maximum |
| Nut Height | 0.175 inches maximum |
| Nut Length | 0.948 inches maximum |
| Nut Mounting Provision | Straight holes |
| Nut Style | Plate |
| Plate Thickness | 0.032 inches maximum |
| Plate Width | 0.290 inches minimum and 0.416 inches maximum |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Qq-p-416,ty 2,cl 3 fed spec single treatment response |
| Temperature Rating | 450.0 deg fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series | UNJC |
| Thread Size | 0.112 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS686A04
- NAS686A04K
- NAS686A06
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for NAS686A04 — functionally equivalent.
- MS21059L04 Listed alternate #4-40 · Steel
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- MS21060L04 MS #4-40 · Iron
- MS21062L04 MS #4-40 · Iron
- NAS686A04K NAS #4-40 · Steel
- NAS687A04 NAS #4-40 · Steel
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error