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Sensor Type
Door / Window
Contact Closure / Relay
Ease of Installation
Intermediate (Installs < 60 minutes)
United Security
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Compact Sensor Screws Securely Into Place
United Security Products 250 Twist-Loc .675 Inch Gap Disc Magnet Contact
United Security Products 250 Twist-Loc .675 Inch Gap Disc Magnet Contact
United Security Products 250 Twist-Loc .675 Inch Gap Disc Magnet Contact
Item# 79637
Price: Normally $7.60 
Hot Deal $5.88
Free shipping on orders over $175 - See Details


  • 3/8" x 5/8" precision machined metal construction
  • .4 inch diameter
  • Closed circuit
  • One turn locks in place, one turn removes for tests
  • 24 inch leads

Essential Info

United Security Products' patented Twist Loc contacts are guaranteed to provide excellent performance with an unparalleled ease of installation.. The spiral threads make installation and removal easy with one quick turn. This closed circuit contact works with a gap of up to .675 inches.
Important notes:
Defective exchanges for identical item within 30 days of purchase. After 30 days, please contact the manufacturer.
Manufacturer contact information: United Security Products Inc / Emer Call, Tel: (858) 413-0149


2 Ratings
5 star: 50%  (1)
4 star: 50%  (1)
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Average Customer Rating
(2 customer ratings)
Share your thoughts with other customers
SAL -- new fairfield, CT   12/11/2011
so far so good, easy to install and well made and out of site.

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