Aluminum Industrial Contact Example: N505AUTMC/STSD072
N = Nascom part number
505A = 505A series aluminum industrial contact
U= Universal Mount
TM = Track Mount C = Commercial 3 inch rail size
/ST = Switch and Magnet set
SD = Single Pole Double Throw (Form C) contact.
072 = Custom 72 inch Armor Flex lead length
3/8 inch Recessed Switch Example: N1175TW/ST
N = Nascom part number
1175 = 1175 series Stubby 3/8” Press fit recessed contact
T = Screw Terminal Contact
W = White Color
/ST = Switch and Magnet Set
Other part number designations:
/SW = Switch only
/M = Magnet only

BRACKET SELECTION GUIDE:

Guide to brackets and contacts they will accept.
AUTM/BRKTKIT: For rail mounting the N505AU series to a standard residential overhead door with 2-1/4 depth track. See the complete set. N505AUTM/ST.
AUTMC/BRKTKIT: For rail mounting the N505AU series to a commercial overhead door with 3" depth track. See the complete set. N505AUTMC/ST
BRACKET S-9: Will accept surface mount contacts in the INDUSTRIAL COMMERCIAL products category except the N505AS and N400T series.
BRACKET EA50: Will accept surface mount contacts in the INDUSTRIAL COMMERCIAL products category except the N505AS and N400T series.
BRACKET 1913 .... Will accept surface mount contacts in the INDUSTRIAL COMMERCIAL products category except the N505AS and N400T series.
BRACKET 505S/A ... Designed to fit the N505AS series only. N505ASBRACKETKIT ... BRACKET 505S/A with mounting screws, nuts and washers.
BRACKET GATE and BRACKET GATE SPAC for mounting the N505A/STMPA to a chain link fence. See N505A/STMPAG
BRACKET SECLOOP. Replacement Bracket for the N505AS/STHSLP series.
The following are the available Bracket kits that include screws, washers and nuts.
BRACKETEA50KIT, BRACKET #EA50 WITH SCREWS, NUTS AND WASHERS Unit Price: $4.95, MOQ = 1.
BRACKET1913KIT, BRACKET #1913 WITH SCREWS, NUTS AND WASHERS, Unit Price: $3.95, MOQ = 1.
AUTM/BRKTKIT, TRACK MOUNT BRACKET KIT WITH SCREWS, Unit Price: $8.00, MOQ = 1.
AUTMC/BRKTKIT, COMMERCIAL TRACK MOUNT BRKT KIT W/ SCREWS, Unit Price: $13.00, MOQ = 1.

These are contact arrangements that can be found on switches and relays.
Form A: is a single, normally open contact that closes upon actuation when the magnet actuator is in proximity of the switch.
Form B: is the same as A except in reverse. A form B is normally closed contact that opens upon actuation when the magnet actuator is in proximity of the switch.
Form C: is a form A contact connected to a form B contact. The form C contact has 3 wire leads, NO (normally open), NC (normally closed) and C (common). Upon actuation when the magnet actuator is in proximity of the switch, the NO (normally open) contact closes (continuity from NO-C) and the NC contact opens (no continuity from NC-C).
It is more common to see the following designations:
Form A and B can also be referred to as Single Pole- Single Throw Contacts:
SPST-NO (Closed Loop) = Form A
SPST-NC (Open Loop) = Form B
Form C can be referred to as Single Pole Double Throw:
SPDT = Form C

We can add lead length to two, three, four and 6 wire switches, zip cord, jacketed cable and armored flex. Just let us know what length you require for your application.

Nascom uses Neodymium magnets in most switch models and we are often asked “ What is Neodymium ? “Neodymium magnets are a member of the rare earth magnet family. They are referred to as Rare Earth because neodymium is a member of the rare earth elements on the periodic table. Neodymium magnets are the strongest of the rare earth magnets and are among the strongest magnets manufactured in the world.