MS21904 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | Fitting, elbow 90°, flareless tube |
| Status | Check the current issue of the standard before design use. |
Dimensions by size
| Dimension, in | -2 | -3 | -4 | -5 | -6 | -8 | -10 | -12 |
|---|---|---|---|---|---|---|---|---|
| OD — Tube O.D. | 1/8 | 3/16 | 1/4 | 5/16 | 3/8 | 1/2 | 5/8 | 3/4 |
| T — Thread T (MIL-S-8879) | .3125-24 | .3750-24 | .4375-20 | .5000-20 | .5625-18 | .7500-16 | .8750-14 | 1.0625-12 |
| Q — Q (+3/64 / -0) | 3/4 | 13/16 | 7/8 | 15/16 | 1-1/32 | 1-1/4 | 1-13/32 | 1-9/16 |
| V — V | 5/16 | 3/8 | 7/16 | 1/2 | 9/16 | 3/4 | 7/8 | 1-1/16 |
| W — W (approx.) | 5/16 | 5/16 | 3/8 | 1/2 | 1/2 | 5/8 | 3/4 | 7/8 |
Dimensions in inches as tabulated in the catalogue listing; the standard governs. Blank cells: not stated in the listing.
Part numbers
| Part no. | Size | Tube O.D. | Thread T (MIL-S-8879) |
|---|---|---|---|
| MS21904-2 | 1/8 | 1/8 | .3125-24 |
| MS21904-3 | 3/16 | 3/16 | .3750-24 |
| MS21904-4 | 1/4 | 1/4 | .4375-20 |
| MS21904-5 | 5/16 | 5/16 | .5000-20 |
| MS21904-6 | 3/8 | 3/8 | .5625-18 |
| MS21904-8 | 1/2 | 1/2 | .7500-16 |
| MS21904-10 | 5/8 | 5/8 | .8750-14 |
| MS21904-12 | 3/4 | 3/4 | 1.0625-12 |
Part numbers as listed. The standard governs and may list other sizes.
Part number
What each code means
| Part | Meaning |
|---|---|
| Format | MS21904<material><dash> |
| D | Material: Aluminum 2024 |
| - | Material: Steel |
| J | Material: Corrosion resistant steel 304 |
| W | Material: Aluminum 7075 |
| Example | MS21904-4 — Steel, 1/4 in tube |
Notes from the standard
- W is shared by -2/-3 and by -5/-6 in the listing, repeated on each row.
- V#P (corrosion resistant steel, cadmium plated) is a further listed form.
Where to buy
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Distributors coming soon.
Sources
- MS21904 — Elbow, Flareless Tube, 90° — 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.