The family side by side
| Standard | Type | Threads on the sheet | Max temp. | K version |
|---|---|---|---|---|
| MS21047 | Two Lug, Low Height | 4-40 to 5/16-24 | 450 °F | Yes |
| MS21049 | Two Lug, Low Height, 100° Countersunk | 8-32 to 5/16-24 | 450 °F | Yes |
| MS21051 | One Lug, Low Height | 6-32 to 7/16-20 | 450 °F | Yes |
| MS21055 | Corner, Low Height | 4-40 to 5/16-24 | 450 °F | Yes |
| MS21059 | Two Lug, Low Height, Floating | 4-40 to 3/8-24 | 450 °F | Yes |
| MS21061 | One Lug, Floating | 4-40 to 5/16-24 | 450 °F | Yes |
| MS21069 | Two Lug, Low Height, Reduced Rivet Spacing (Miniature) | 2-56 to 3/8-24 | 450 °F | Yes |
| MS21071 | One Lug, Low Height, Miniature | 2-56 to 3/8-24 | 450 °F | Yes |
| MS21073 | Corner, Low Height, Miniature | 4-40 to 5/16-24 | 450 °F | Yes |
| MS21075 | Two Lug, Low Height, Floating, Miniature | 4-40 to 5/16-24 | 450 °F | — |
| MS21078 | Two Lug, Nylon Insert | 6-32 to 3/8-24 | 250 °F | Yes |
| MS21080 | One Lug, Nylon Insert | 6-32 to 3/8-24 | 250 °F | Yes |
| MS21081 | Corner, Nylon Insert | 4-40 to 3/8-24 | 250 °F | Yes |
| MS21086 | Side by Side, Reduced Rivet Spacing | 8-32 to 3/8-24 | 450 °F | Yes |
Each line from the MS standard on its own data sheet, Table I and title block.
How to choose one
Shape from the space. Two lugs where there is room either side of the screw, one lug or side by side on narrow flanges and edges, corner where two flanges meet. Miniature and reduced spacing types fit tighter rivet patterns.
Floating types let the nut move in its retainer, for holes that may not line up exactly.
Nylon insert types (MS21078, MS21080, MS21081) are rated to 250 °F; the all-metal ones to 450 °F.
Then the thread, from the screw. Check rivet spacing J against the existing holes before ordering: it changes with type and size. The part number decoder finds the row for any MS number and the weight of a batch.
Limits — when NOT to use this
- Approved data governs. Use the nutplate the maintenance manual or IPC specifies.
- NAS nutplates (capped, deep counterbore, replaceable element) are not here yet: their figures need a primary source before they are published.
Sources
- MS21047 Rev. F, 1 Feb 1994 — Nutplate, Self-Locking, Two Lug, Low Height — Table I.
- MS21049 Rev. F, 15 Feb 1994 — Nutplate, Self-Locking, Two Lug, Low Height, 100° Countersunk — Table I.
- MS21051 Rev. G, 1 Feb 1994 — Nutplate, Self-Locking, One Lug, Low Height — Table I.
- MS21055 Rev. G, 1 Feb 1994 — Nutplate, Self-Locking, Corner, Low Height — Table I.
- MS21059 Rev. J, 1 Feb 1994 — Nutplate, Self-Locking, Two Lug, Low Height, Floating — Table I.
- MS21061 Rev. G, 1 Feb 1994 — Nutplate, Self-Locking, One Lug, Floating — Table I.
- MS21069 Rev. G, 1 Feb 1994 — Nutplate, Self-Locking, Two Lug, Low Height, Reduced Rivet Spacing (Miniature) — Table I.
- MS21071 Rev. G, 1 Feb 1994 — Nutplate, Self-Locking, One Lug, Low Height, Miniature — Table I.
- MS21073 Rev. G, 1 Feb 1994 — Nutplate, Self-Locking, Corner, Low Height, Miniature — Table I.
- MS21075 Rev. H, 28 Mar 1995 — Nutplate, Self-Locking, Two Lug, Low Height, Floating, Miniature — Table I.
- MS21078 Rev. G, 15 Feb 1994 — Nutplate, Self-Locking, Two Lug, Nylon Insert — Table I.
- MS21080 Rev. D, 20 Apr 1993 — Nutplate, Self-Locking, One Lug, Nylon Insert — Table I.
- MS21081 Rev. D, 20 Apr 1993 — Nutplate, Self-Locking, Corner, Nylon Insert — Table I.
- MS21086 Rev. D, 28 Mar 1995 — Nutplate, Self-Locking, Side by Side, Reduced Rivet Spacing — Table I.
Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.