The Digits in a Dottie Part Number Are the Size, in Hundredths of an Inch
Dottie describes its numbering as descriptive, which sounds like marketing until you use it. On the fittings, anchors, straps and hangers in this range the digits are literally the size, written as hundredths of an inch with the decimal point dropped. Once you see it, searching 2,966 items stops being a scroll and becomes a lookup. ZRC75 is a three quarter inch connector. ZAS150 is a one and a half inch anchor. PH400B is a four inch conduit hanger.
Reading the number
Take the letters as the family and the digits as the size. The conversions repeat across the whole catalog, so learning eight of them covers most of what you will search for. Zamac, which appears twice in the table below, is the zinc alloy Dottie uses for its drive-in masonry anchors. Anchors specifically are worth knowing about first, because Dottie supplies the entire anchors collection on this site.
Digits of 38 mean three eighths of an inch, as in ZRC38, a three eighths inch non-metallic cable connector. Fifty means half an inch, as in HW50, a half inch one hole pipe strap, and 75 means three quarters, as in ZRC75. Seventy eight means seven eighths, as in ZA78, a three sixteenths by seven eighths inch Zamac anchor.
From there it scales cleanly. A 100 is one inch, as in ZAS100, a quarter by one inch Zamac anchor. A 125 is one and a quarter inches and 150 is one and a half, giving ZAS125 and ZAS150 in the same anchor family. A 200 is two inches, as in ZAS200, and a 400 is four inches, as in PH400B, a four inch conduit hanger supplied with nut and bolt.
Extra segments carry the variant. LT9075I decodes as a liquid tight connector, 90 degree body, three quarter inch, insulated throat. SL9050 is the steel version of the same fitting at half an inch without the insulated throat. A trailing SS means stainless steel, a trailing B means the hanger ships with its nut and bolt, and CG on a conduit body means cover and gasket included. Those fittings are collected in conduit and fittings.
A 90 straight after the letters means a ninety degree body rather than a straight one, as in SL9050, a half inch ninety degree steel connector. A trailing I means an insulated throat, which is what separates LT9075I from the plain LT9075.
A trailing SS means stainless steel, so PH75BSS is the stainless version of the plain steel PH75B. A trailing B means the part ships with its hex nut and bolt, as in PH50B. A trailing CG means the cover and gasket are included, as in TB75CG, a three quarter inch threaded conduit body.
Where the rule stops holding
Being honest about the boundary is what makes the rule usable. It holds on fittings, anchors, straps, hangers and conduit bodies. It does not hold everywhere else, and three exceptions account for almost all of the confusion.
On threaded fasteners the digits are diameter and length run together instead of a single size. MB586 is a five eighths by six inch hex head tap bolt, and MB58512 is the same diameter at five and a half inches. On kits and consumables the digits are a piece count or a pack quantity, so TK250 is a 250 piece terminal kit and WPI100 is a hundred pack of gasket. And a few letter prefixes are reused across unrelated families, with TB covering both toggle bolts and threaded conduit bodies. When the digits do not resolve to a size, read the title instead of guessing. Background on fastener and anchor selection sits in the electrical guides.
What the catalog actually covers
Dottie is a job-site consumables brand rather than a fixture or device manufacturer. The weight is in threaded fasteners and anchoring, with a substantial fittings range alongside it and a smaller tool group.
Screws and bolts dominate at 1,239 products, covering machine, self-drilling, sheet metal, lag, tap and cap screws. Conduit fittings follow at 590, spanning liquid tight connectors, couplings, nipples and reducing bushings. Anchors account for 217 products across Zamac, plastic, wedge, toggle and concrete screw types.
Straps and supports add 191 pipe straps, conduit hangers and strut clamps. Conduit bodies with covers and gaskets account for 74, reducing and insulating bushings for 64, and cable ties for 44, which is the entire cable tie range on this site. A further 220 products are tools and bits, meaning hole saws, drill bits, driver bits and reciprocating blades.
Almost everything here is a sealed pack
The quantity in the title is the quantity you receive, and on this brand it is usually not one. Hundred packs alone account for 1,073 listings, and only 1,053 of the 2,966 products are single items. On a small job that turns a fourteen dollar decision into a very different number, and on a large one it is exactly what you want.
Hundred piece packs alone account for 1,073 listings, and single items for 1,053. After those, 50 piece packs cover 315 listings, 25 piece packs 228, ten piece packs 124 and five piece packs 77. Another 62 listings are 2 and 20 piece packs, ten are 250 piece packs, and 24 more use nine other quantities running from 6 up to 500.
The same part is sometimes stocked in more than one pack size, so search the base number rather than settling for the first listing. Straps and hangers in particular are cross-listed into straps and supports, where the pack quantity shows in the title on every tile.
Where Dottie sits in Lumera's catalog
This brand is not one option in the hardware collections, it is nearly all of them. All 217 anchors on this site are Dottie, all 44 items in cable ties are Dottie, and 1,239 of the 1,240 products in the screws and bolts collection come from this brand.
Further out, 1,911 products appear in the wider fasteners and hardware collection, 590 in conduit fittings, 74 in conduit bodies and 64 in bushings.
A further 20 items reach ground clamps. The tools, drill bits and hole saws have no type collection at all, so they are reachable only from here or through search.
What to confirm before ordering
Fasteners and anchors are the cheapest line on a job and the one most likely to fail an inspection when the wrong thing goes in a wall. Anchor selection in particular is governed by the base material, the load and the inspector. Lumera's installation and code disclaimer makes that division clear.
- Pack quantity. Read it in the title before quantity. Two thirds of this catalog ships as a sealed pack.
- Size. The digits give it on most fittings, but confirm against the title, because the rule does not extend to threaded fasteners.
- Base material. An anchor for concrete, one for hollow block and one for drywall are three different products.
- Fastener material and finish. Zinc plated steel, stainless steel, silicon bronze and brass all appear, and the choice decides corrosion behavior.
- Head and drive. Phillips, slotted, square, hex washer and tamper proof drives are not interchangeable on site.
- Thread count. Stated on threaded fasteners as part of the size, such as 5/8-11, and it has to match the mating part.
- Insulated throat. On liquid tight and cable connectors, the trailing I marks it and its absence means bare metal against the conductor.
- Grade. Grade 5 hex head cap screws are called out separately from general steel screws for a reason.
Part number, pack and material questions on Dottie
What do the numbers in a Dottie part number mean?
On fittings, anchors, straps and hangers they are the size in hundredths of an inch with the decimal dropped. So 38 is three eighths, 75 is three quarters, 100 is one inch, 150 is one and a half and 400 is four inches. ZRC75 is a three quarter inch connector and ZAS150 is a one and a half inch anchor. It is the fastest way to search this catalog once you trust it.
Why does that rule not work on the screws?
Because threaded fasteners need two dimensions rather than one, so the digits carry diameter and length together. MB586 reads as five eighths by six inches and MB58512 as five eighths by five and a half. Kits and consumables use the digits differently again, for a piece count or a pack quantity. If the number does not resolve cleanly to a single size, the title has the answer.
Am I buying one piece or a box?
Read the parenthesis at the end of the title. Where it names a quantity, that is a sealed pack and the listing covers all of it. Only about a third of the products here are single items, and hundred packs are the most common format at over a thousand listings. The same part is sometimes offered in two pack sizes, so it is worth searching the base number before accepting the first result.
What is a Zamac anchor and when do I use one?
Zamac is a zinc alloy, and these are the drive-in anchors used for light to medium duty fixing into concrete, block and brick. Dottie stocks two families here, the ZA series with a carbon steel drive pin and the ZAS series with a removable screw. The removable screw version is the one to use where the fixture may need to come off again, since a pin anchor is effectively permanent once set.
Which material should I pick for an outdoor or wet installation?
Zinc plated steel is the general purpose default and it is fine indoors and in dry service. Stainless steel is the choice outdoors, near irrigation, in coastal air or anywhere the fastener will be washed down. Silicon bronze and brass appear in the range for specific corrosion and conductivity reasons. On a fastener the cost difference is small and the failure cost is a rusted head that will not come out in five years.
What does the I at the end of a connector part number mean?
Insulated throat. LT9075I is an insulated three quarter inch ninety degree liquid tight connector and LT9075 is the same fitting without it. The insulated throat protects conductor insulation where the wire turns into the fitting, and some specifications and inspectors require it. Since the two part numbers differ by one character, it is worth checking rather than assuming.
