Do you own an ARC AAA and a caliper? Need help

I am working on a mod for ARC AAAs and need to know the degree of variability of a couple of dimensions. If you own an ARC AAA and a caliper I would greatly appreciate if you could help me out. I need two measurements. I need the diameter of the threads of the head and I need the depth of the battery tube from the open end to the negative contact dimple. These two dimensions are on the order of .445" and 2.085" respectively. Please include any indication of the age of the ARC measured, e.g., Type II vs HA III anodyze, location of inscription. Since I am looking for the range of variability, the more units measured the better. TIA.

EDIT: Also, if you own a Peak "prototype" AAA battery tube [this is the one that looks like an ARC clone] I would be interested in the depth measurement of it also.

Another EDIT Another measurement that I could use: With no cell in the light and the head screwed fully in, how much does the head protrude from the body? On the older black ones this measurement should be on the order of .280" and I think (?) a bit longer on the newer HA III ones. This is probably easiest to measure by measuring the overall length and then just the body w/o head and subtracting to get the head protrusion distance.

.4470 for threads
2.1390 dept from edge to bottom

arc aaa Limited Edition w/circumfrance lettering, HA grey w/tiger stripes

[ QUOTE ]
cy said:
.4470 for threads
2.1390 dept from edge to bottom

arc aaa Limited Edition w/circumfrance lettering, HA grey w/tiger stripes

[/ QUOTE ]
Cy: Is that depth measurement to the bottom as you say or to the negative contact dimple? I am looking for the measurement to the dimple that contacts the negative end of the cell. Thanks.

2.103 depth to neg dimple ,445 head thread dia, 2003 cpf ed circumferential inscription, HA red. protrusion 2.95

doug, that was 2.0970 to dimple

Black anodized, no chemkote, full circumferential lettering, unk. date-
Threads= .446"
Depth to neg. contact= 2.079"
Head protrusion= 2.703-2.430= .273"

HA Nat, full circumferential lettering, checked 5/04
Threads= .448"
Depth to neg. contact= 2.095"
Head Protusion= 2.732-2.430= .302"

AWS-NAT
White LED
Natural Finish

CHECKED May 24 2004
"ARC" writing just below head

Threads= .448"
Depth to neg. contact= 2.098"
Head Protusion= 2.728-2.429= .299"

Black with chemkote, circ lettering, white LED
2.115" .446"
2.118" .445"

Red 2003 CPF edition
2.105" .445" White

HAIII long lettering
2.100" .444" RGB
2.097" .448" Tirq.

old 'shiny' black, gasket - no O-ring V.1?
2.084" to edge of dimple
2.090" to center of dimple .4525" Orange LED

old 'shiny' black, O-ring red LED
2.084" to edge of dimple
2.091" to center of dimple .441"

older 'matte' black no chemkote Green LED
2.085" to edge of dimple
2.095" to center of dimple .444"

Note: Earlier bodies had dimples shaped like a donut. The high point ( contact ) is on the outer edge of the dimple.

All measurements made with a Mitutoyo dial caliper.

Hope this helps-

Black with lettering around the top:
-dia. of threads = .440"
-depth to top of neg. contact = 2.089"

-Head protrusion out of body as requested = .274"

People are going to experience variations in both their flashlights and the accuracy of their instruments. You might be careful with these measurements although they should be fairly accurate.

Natural HAIII, while LED, standard
Circumferential lettering
'L.E.D."AAA"-Arc Flashlight, LLC'

Threads: 0.444"
Tube: 2.100"

Arc AAA LE ~3 years old.
Head 0.4485"
Debth to neg term 2.0865"
Head= 0.2820"

Arc AAA LE HA-III
Purchased in Oct 2002
OD of threads = .443"
Depth to dimple = 2.091"

Thanks! You guys are great. /ubbthreads/images/graemlins/bowdown.gif Keep those measurements coming. Note: I have edited my original post to add another measurement that would be useful to me.

No problem Doug. Post above edited for head protrusion length.

Bumped to catch the weekend only CPF surfers.

I purchased both of theses black ARC-AAA flashlights directly from Peter in June of 2002. They both have this legend engraved around the circumference of the battery tube, just below the head: "L.E.D. AAA - Arc Flashlight, LLC" /ubbthreads/images/graemlins/cool.gif

Arc AAA #1
0.444 O.D. head threads
2.099 interior depth to the top of the negative contact, it has a recessed center on mine
0.277 head protrusion

Arc AAA #2
0.442 O.D. head threads
2.110 interior depth to the top of the negative contact, it has a recessed center on mine
0.275 head protrusion

threads: 0.441 in
depth of tube to contact: 2.092 in

"LIMITED EDITION" on bottom of batt tube, 'L.E.D. "AAA" - Arc Flashlight, LLC' around the batt tube below head.

Bump

Anyone else? I am especially interested in the measurement on the Peak prototypes since only one poster here seems to have one.