Just guesses of course, but...

272. Some sort of screen door fastener. Maybe to hold the glass or screen
in place?

273. Sprinkler pipe clamp.

274. I would guess at an old chaulk or ink dispenster for carpenters, etc.

277. Cheap but effective "nut" for use on fiber board or soft woods with
light duty carriage bolts, etc. Digs into the wood as you tighten the
fastener and thus does not spin?

Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-drill.com

V8013

My eBay: http://tinyurl.com/3n8gj

Know a good travel agent? I need one. Really.