Fixing presentation of objective thread

app/templates/_connection_macros.html

@@ -0,0 +1,17 @@
+{%- macro connection_spec(ap) -%}
+  {%- if ap.iso_thread -%}
+    M{{ ap.iso_thread.diameter_mm }}×{{ ap.iso_thread.pitch_mm }}
+  {%- elif ap.unc_thread -%}
+    {{ ap.unc_thread.diameter_fraction }}-{{ ap.unc_thread.tpi }} {{ ap.unc_thread.series.value }}
+  {%- elif ap.clamp_connection -%}
+    {%- if ap.clamp_connection.min_mm is not none -%}
+      {{ ap.clamp_connection.min_mm }}–{{ ap.clamp_connection.max_mm }} mm
+    {%- else -%}
+      {{ ap.clamp_connection.min_in }}–{{ ap.clamp_connection.max_in }} in
+    {%- endif -%}
+  {%- elif ap.static_connection -%}
+    {{ ap.static_connection.od_mm }} mm OD
+  {%- else -%}
+    —
+  {%- endif -%}
+{%- endmacro -%}