On Jun 19, 2009, at 8:41 PM, Meghrouni Vince wrote:
> All the screws necessary to take the PS out of my G4 2002 933 Mhz > Quicksilver are phillips except one, and no phillips touches it, > though it looks like a phillips. Is it a "pozi" drive? The slots are > shallow and not beveled. What do I use to get this one fastener out? Someone substituted an ersatz fastener. All the fasteners on the G3s and G4s, and probably the G5s, with one important exception, are metric. To be specific, the metric fasteners on the PSUs are all M3.5-0.6, and which look startlingly like an Imperial #6-32 UNC. (The exceptions are the HD retaining screws. Those are all #6-32 UNC). If you truly found a Pozi-Driv on the PSU, then either: 1) it is the fastener which retains the "L" shaped bracket, and it was put there by the PSU manufacturer and is not intended to be replaced, or 2) it is an ersatz fastener, placed there by someone who was trying to perform a "make do". Remember: on G3s and G4s, and possibly also on G5s, all PSU retaining screws, all drive bracket retaining screws (but NOT the HD retaining screws themselves) and all PCI or PCI-E card retaining screws are specials made for Apple and are M3.5-0.6. Apple has used a variety of heads on these M3.5-0.6 screws: #1 Phillips, #2 Phillips, slotted, and Torx. The whole idea behind Apple's decision was to keep Apples an all- metric machine, with the sole exception of the HD retaining screws which are always #6-32 UNC (and are Imperial). --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed Low End Mac's G3-5 List, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com To unsubscribe from this group, send email to g3-5-list-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
