#2. "RE: lost a screw and a nut......." | In response to Reply # 0JM Registered since 01st Mar 2007Sun 14-Apr-02 02:14 AM
Do you know anything about how to establish thread size. Since there are 2 basic systems of threads in common usage. The 'English' or fractional inch sizes used in the USA (ironically no lomger used in the England) and metric which is used everywhere else.
To tell the difference a good measuring instrument is needed to gauge the outside diameter of the threaded stud (use the knob mounted stud from a section you do have to measure). This outside diameter is usually 70-75% of the nominal diameter size of the thread specification (because a 100% thread would be to tight to use effectively).
Another way is to measure the 'pitch' of the screw, its threads per unit of length, which can be done with a good ruler. Choosing the proper system for the ruler can be tricky but a good rule of thumb is a metric thread is commonly finer pitched than its similiar diameter fractional inch counter part.
Considering the mixed bag of thread sizes used in photography it can be frustrating and easily mistaken gauging actual sizes. So I would suggest taking an example to a supplier with both types available, the previously mentioned bike shop is a good option tho they may not have the needed thumb screw.
You may also try dropping an e-mail to Manfrotto (http://www.manfrotto.com/) to see if they offer spare parts.
#3. "RE: lost a screw and a nut......." | In response to Reply # 0BJNicholls Charter MemberSun 14-Apr-02 02:43 PM
Bogen has a good repair parts department and they'll send you whatever you need, but I'd suggest you remove a nut and bolt from one of the other legs and head over to a hardware store to buy a match (and get a spare while you're at it).
I've found that most of the fasteners on Manfrotto/Bogen tripods are SAE (English) threads and are often standard size. Even if these particular pieces turn out to be metric, many home centers and hardware stores have a good stock these days. Head to an Ace Hardware or Home Depot with your example part - I'm confident you'll find a workable match.