---
type: "o-ring"
dash_number: "002"
designation: "AS568-002"
cs_series: "001-003"
cs_series_name: "AS568 dash 001-003"
id_in: 0.042
id_mm: 1.07
cs_in: 0.05
cs_mm: 1.27
od_in: 0.142
od_mm: 3.61
id_tol_in: 0.0039
cs_tol_in: 0.0031
standard: "SAE AS568; MIL-G-5514G (public domain, inactive for new design)"
verified: "August 1, 2026"
url: https://shopmath.org/o-rings/as568-002
---

# AS568-002 O-Ring Size — ID, Cross-Section and OD

An AS568-002 o-ring has an inside diameter of 0.0420 in (1.070 mm) and a 0.0500 in (1.270 mm) cross-section, for an outside diameter of 0.1420 in (3.610 mm). It belongs to the AS568 dash 001-003 band.

- **Dash number**: 002
- **Cross-section series**: AS568 dash 001-003
- **Inside diameter**: 0.0420 in (1.070 mm)
- **Cross-section**: 0.0500 in (1.270 mm)
- **Outside diameter**: 0.1420 in (3.610 mm)
- **Standard**: SAE AS568; MIL-G-5514G (public domain, inactive for new design)

## AS568-002 Dimensions and Tolerances

| Dimension | Inch | Millimetre |
| --- | --- | --- |
| Inside diameter (ID) | 0.0420 | 1.070 |
| Cross-section (CS) | 0.0500 | 1.270 |
| Outside diameter (OD) | 0.1420 | 3.610 |
| ID tolerance | ±0.0039 | ±0.100 |
| CS tolerance | ±0.0031 | ±0.080 |

_Outside diameter is computed as ID + 2 × CS; AS568 tabulates ID and CS._

## O-Ring Sizes Closest to AS568-002

Nearest AS568 sizes by inside diameter — the substitutes to check when this one is out of stock.

| Size | ID (in) | ID (mm) | CS (in) | OD (in) |
| --- | --- | --- | --- | --- |
| [AS568-102](https://shopmath.org/o-rings/as568-102.md) | 0.0490 | 1.240 | 0.1030 | 0.2550 |
| [AS568-001](https://shopmath.org/o-rings/as568-001.md) | 0.0290 | 0.740 | 0.0400 | 0.1090 |
| [AS568-003](https://shopmath.org/o-rings/as568-003.md) | 0.0560 | 1.420 | 0.0600 | 0.1760 |
| [AS568-004](https://shopmath.org/o-rings/as568-004.md) | 0.0700 | 1.780 | 0.0700 | 0.2100 |
| [AS568-103](https://shopmath.org/o-rings/as568-103.md) | 0.0810 | 2.060 | 0.1030 | 0.2870 |
| [AS568-005](https://shopmath.org/o-rings/as568-005.md) | 0.1010 | 2.570 | 0.0700 | 0.2410 |

## Sources and Method for AS568-002

### AS568 dimensions

- **Source**: bd_warehouse o-ring_parameters.csv (Apache-2.0) and bckasper3/KasperCalc oring-sizes.js (MIT), agreeing on all 349 sizes; OD computed as ID + 2 x CS
- **Method**: computed+compiled
- **Verified against**: two independent open datasets agreeing on all 349 sizes; fabricated-dataset negative control passed; 21 checks total

### Assumptions

- Dimensions are for a nominal, unstretched ring at room temperature. Installed stretch reduces cross-section.
- Gland figures are static-application only and assume a nominal ring; they carry no compound, temperature or pressure assumption.
- Dataset scope: A fabricated-dataset negative control is asserted against on every run. EXCLUDED: groove width, corner radius, diametral clearance, back-up ring widths, surface finish, all dynamic glands, the 900-series, and ISO 3601 metric sizes.

**Data last verified**: August 1, 2026

## Common Questions About the AS568-002 O-Ring

### What size is an AS568-002 o-ring?

AS568-002 has an inside diameter of 0.0420 in (1.070 mm) and a cross-section of 0.0500 in (1.270 mm), giving an outside diameter of 0.1420 in (3.610 mm).

### What is the o-ring size tolerance on AS568-002?

The AS568 tolerance on AS568-002 is ±0.0039 in (±0.100 mm) on the inside diameter and ±0.0031 in (±0.080 mm) on the cross-section.

### What o-ring is closest in size to AS568-002?

The nearest AS568 sizes by inside diameter are AS568-102 (0.0490 in ID), AS568-001 (0.0290 in ID), AS568-003 (0.0560 in ID).

## Related pages

- Previous dash number: [AS568-001](https://shopmath.org/o-rings/as568-001.md) — 0.0290 in ID
- Next dash number: [AS568-003](https://shopmath.org/o-rings/as568-003.md) — 0.0560 in ID
- All o-ring sizes: [AS568 o-ring reference](https://shopmath.org/o-rings.md)
- Full size chart: [AS568 o-ring size chart](https://shopmath.org/charts/o-ring-sizes.md)

---

*Source: [ShopMath](https://shopmath.org/o-rings/as568-002) — data verified August 1, 2026. Reference data; verify against the governing standard before manufacture.*