The United States's Mandrel nuclear test series followed the Operation Bowline series and preceded the Operation Emery series.

{| class="wikitable sortable"

|+ United States' Mandrel series tests and detonations

|-

!style="background:#ffdead;" | Name

!style="background:#efefef;" | Date time (UT)

!style="background:#ffdead;" | Local time zone

!style="background:#efefef;" | Location

!style="background:#ffdead;" | Elevation + height

!style="background:#efefef;" | Delivery <br />Purpose

!style="background:#efefef;" | Device

!style="background:#ffdead;" | Yield

!style="background:#efefef;" class="unsortable" | Fallout

!style="background:#ffdead;" class="unsortable" | References

!style="background:#efefef;" class="unsortable" | Notes

|-

! Ildrim

| 13:02:30.04

| style="text-align:center;" | PST (–8&nbsp;hrs)<br /> || NTS Area U2au

| –

| underground shaft,<br />weapons development

|

| style="text-align:center;" |

|

|

</references>