MS20004 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | Internal wrenching bolt |
| Status | Check the current issue before design use. |
Dimensions by size
| Dimension, in | 1/4-28 |
|---|---|
| Thread | 1/4-28 |
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.
1/4-2815 part numbers
| Part no. | Grip, in | Length, in |
|---|---|---|
| MS20004-4 | .250 | .750 |
| MS20004-6 | .375 | .875 |
| MS20004-8 | .500 | 1.000 |
| MS20004-10 | .625 | 1.125 |
| MS20004-12 | .750 | 1.250 |
| MS20004-14 | .875 | 1.375 |
| MS20004-16 | 1.000 | 1.500 |
| MS20004-18 | 1.125 | 1.625 |
| MS20004-20 | 1.250 | 1.750 |
| MS20004-22 | 1.375 | 1.875 |
| MS20004-24 | 1.500 | 2.000 |
| MS20004-26 | 1.625 | 2.125 |
| MS20004-28 | 1.750 | 2.250 |
| MS20004-30 | 1.875 | 2.375 |
| MS20004-32 | 2.000 | 2.500 |
Part number
What each code means
| Part | Meaning |
|---|---|
| Format | MS20004-<dash> |
| Example | MS20004-4 — Internal wrenching bolt, 1/4-28 thread, grip .250, length .750 |
Notes from the standard
- Grip tolerance ±.010.
- Listed as replacing NAS144, NAS145 and NAS146.
- 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
- MS20004 — Bolt, Internal Wrenching — 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.