ASNA2050 at a glance
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Specification
| Item | Value |
|---|---|
| Type | Solid rivet, metric |
| Material | 2017A-T4 aluminium alloy (old French name A-U4G), code DX; radiused shank end |
| Finish | J = chemical conversion (Alodine type) |
| Procurement | Replaces the DE rivets (2017A driven freshly quenched, square shank end) |
| Status | Partial sheet: the standard gives no part-number construction. Reference data transcribed from the standard, units marked row by row. Check the issue of the standard in force before design use. |
Dimensions by size
| Dimension, inch first (mm after) | Ø 4 mm | Ø 4.8 mm |
|---|---|---|
| Diameter | 4 mm = 0.158 in (nearest fraction 5/32 in) | 4.8 mm = 0.189 in (nearest fraction 3/16 in) |
| Hole | 0.158–0.162 in (4.01–4.11 mm) | 0.189–0.193 in (4.80–4.90 mm) |
| Drill (chart) | #21 (0.1590 in; 4.04 mm) | #11 (0.1910 in; 4.85 mm) |
| Shop head D | 0.244–0.295 in (6.2–7.5 mm) | 0.287–0.343 in (7.3–8.7 mm) |
| Shop head H | 0.051–0.087 in (1.3–2.2 mm) | 0.063–0.102 in (1.6–2.6 mm) |
Millimetres are printed and stated by the standard; the inch values are our conversion (mm ÷ 25.4). The diameters are metric: 4 means 4 mm, never dash -4 (1/8 in).
Part numbers
One row per diameter: the standard gives no length or diameter codes.
Part number
How to read it
| Segment | Reads as ASNA2050 |
|---|---|
| ASNA2050 Standard | Solid rivet, ductile 2017A-T4 aluminium alloy (material code DX), radiused shank end. Head: protruding (TG).Unit of the code: None: the number of the standardFrom: The standard |
| (none) Diameter | Not written in the number (not given by the standard): Ø 4 mm (0.158 in, our conversion); hole 4.01–4.11 mm; nearest inch size 5/32 in (3.969 mm).Unit of the code: mm, printed by the standard: the diameters are metric (4 means 4 mm, never dash -4); the standard covers Ø 4 and Ø 4.8 mm, the hole table also lists the DX columnFrom: Diameter and hole table (Dimensions by size, above) |
| (none) Length | Not in the number: Not given by the standard.Unit of the code: not given by the standardFrom: not given by the standard |
Worked example. ASNA2050 reads: ASNA2050 solid rivet, protruding · diameter Ø 4 mm · length not in the number. The standard covers Ø 4 and Ø 4.8 mm; the hole table also lists no other size mm for DX.
From a measured hole or stack to the code
- Hole to diameter. Take the diameter whose hole range holds the measured hole: Ø 4 → 4.01–4.11 mm · Ø 4.8 → 4.80–4.90 mm.
- Length. L = E + K·D with K = 1.3 for DX (1.5 for 2117 DC, 0.8 for Monel TB), all in mm. Do not cut these rivets to length.
If a segment is missing
- Without the standard number the codes cannot be read.
- Diameter and length are not in the number (not given by the standard): order by the standard number and the drawing.
What each code means
| Part | Meaning |
|---|---|
| Example | ASNA2050 — The standard gives no diameter or length codes: order by the standard number and the drawing |
Installation
| Method | Equipment |
|---|---|
| Squeezing | One operator, pneumatic squeezers (several yoke lengths) or manual squeezers |
| Percussion | Pneumatic rivet gun, two people or one operator, with suitable rivet sets and bucking bars |
Notes from the standard
- Length: L = E + K·D with K = 1.3 for DX (1.5 for 2117 DC, 0.8 for Monel TB), all in mm. Do not cut these rivets to length.
- Head mark: a raised rectangle-circle-rectangle on protruding and reduced countersunk heads only; no mark on the standard countersunk head.
- A #21 drill fits the DX 4 mm hole but not the DC / TB 4 mm hole (0.159–0.163 in; 4.05–4.15 mm printed); a #12 fits DX 4.8 but not DC / TB (0.191–0.195 in; 4.85–4.95 mm printed).
- The ASNA codification table lists only 4 and 4.8 mm. The DX drill and shop-head table these standards share with others also runs through 2.4 and 3.2 mm: those two are not ASNA2049, 2050 or 2051 sizes.
- Two defective rivets must be separated by at least 5 good ones; defects may affect under 5 % of structural rivets and under 20 % of non-structural ones.
- ASNA2049 is the reduced 100° countersunk head, ASNA2050 the protruding head (TG) and ASNA2051 the 100° countersunk head (TF).
- 4 mm (0.1575 in) is not 5/32 in (0.15625 in), 4.8 mm (0.189 in) is not 3/16 in (0.1875 in), and 3.2 mm is not 1/8 in (0.125 in): an inch rivet is never read as the metric one.
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Sources
- ASNA2050 standard (ASNA series) — Codes, tables, tooling and inspection limits transcribed into the reference data of The Aviation Point. The text of the standard is not reproduced. Check the issue in force before design use.
Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.