MS21250 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | 12-point flanged external wrenching bolt |
| Strength | 180 ksi |
| Status | Check the current issue before design use. |
Dimensions by size
| Dimension, in | .1900-32 | .2500-28 | .3125-24 | .3750-24 |
|---|---|---|---|---|
| Thread | .1900-32 | .2500-28 | .3125-24 | .3750-24 |
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.
.1900-3210 part numbers
| Part no. | Grip, in | Length, in |
|---|---|---|
| MS21250-03006 | .375 | .815 |
| MS21250-03008 | .500 | .940 |
| MS21250-03010 | .625 | 1.065 |
| MS21250-03012 | .750 | 1.190 |
| MS21250-03014 | .875 | — |
| MS21250-03016 | 1.000 | 1.440 |
| MS21250-03018 | 1.125 | 1.565 |
| MS21250-03020 | 1.250 | 1.690 |
| MS21250-03022 | 1.375 | 1.815 |
| MS21250-03024 | 1.500 | 1.940 |
.2500-2810 part numbers
| Part no. | Grip, in | Length, in |
|---|---|---|
| MS21250-04006 | .375 | .887 |
| MS21250-04008 | .500 | 1.012 |
| MS21250-04010 | .625 | 1.137 |
| MS21250-04012 | .750 | 1.262 |
| MS21250-04014 | .875 | 1.387 |
| MS21250-04016 | 1.000 | 1.512 |
| MS21250-04018 | 1.125 | 1.637 |
| MS21250-04020 | 1.250 | 1.762 |
| MS21250-04022 | 1.375 | 1.887 |
| MS21250-04024 | 1.500 | 2.012 |
.3125-2410 part numbers
| Part no. | Grip, in | Length, in |
|---|---|---|
| MS21250-05006 | .375 | .974 |
| MS21250-05008 | .500 | 1.099 |
| MS21250-05010 | .625 | 1.224 |
| MS21250-05012 | .750 | 1.349 |
| MS21250-05014 | .875 | 1.474 |
| MS21250-05016 | 1.000 | 1.599 |
| MS21250-05018 | 1.125 | 1.724 |
| MS21250-05020 | 1.250 | 1.849 |
| MS21250-05022 | 1.375 | 1.974 |
| MS21250-05024 | 1.500 | 2.099 |
.3750-2410 part numbers
| Part no. | Grip, in | Length, in |
|---|---|---|
| MS21250-06006 | .375 | 1.020 |
| MS21250-06008 | .500 | 1.145 |
| MS21250-06010 | .625 | 1.270 |
| MS21250-06012 | .750 | 1.395 |
| MS21250-06014 | .875 | 1.520 |
| MS21250-06016 | 1.000 | 1.645 |
| MS21250-06018 | 1.125 | 1.770 |
| MS21250-06020 | 1.250 | 1.895 |
| MS21250-06022 | 1.375 | 2.020 |
| MS21250-06024 | 1.500 | 2.145 |
Part number
What each code means
| Part | Meaning |
|---|---|
| Format | MS21250-<dash> |
| Example | MS21250-03006 — 12-point flanged bolt, .1900-32 thread, grip .375, length .815 |
Notes from the standard
- Grip tolerance ±.010.
- Part number: first dash is the thread (-03 .1900-32, -04 .2500-28, -05 .3125-24, -06 .3750-24); the second dash is the grip number.
- The length of -03 with second dash 014 is illegible in the source and left blank.
- 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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Distributors coming soon.
Sources
- MS21250 — Bolt, External Wrenching, Flanged, 12 Point, 180 ksi — 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.