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bungeye
10-01-2006, 02:57 AM
hey does anyone know if the thread on trigger frame screw is coarse or fine.
manual diagram says M5x12, 12 being the lengh. i need to nknow if it is
M5x0.8 (coarse) or M5x0.5 (fine).

any help would be appreaciated.

cheers
ryan

druid
10-01-2006, 10:31 AM
If I'm not mistaken, metric is metric. Coarse and fine are usually descriptive of SAE threads for machine screws. I've never seen metric delineated into "coarse and fine" before...only SAE.

If you have run into this, I'd say "Coarse" because the threads are deep and wide...and not as tight together as "fine" would describe.

bungeye
10-01-2006, 10:32 PM
there is only .2 of a mm difference between coarse and fine.
http://www.kramerusa.com/DrillTapChart.htm
look at the second chart down "METRIC DRILL TAP SIZES"