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    SECO-LARM SD-993B-SS — Concealed Electric Bolt Lock Specification Sheet

    September 08, 2026 2 min read

    Specification sheet for the SECO-LARM SD-993B-SS Concealed Electric Bolt Lock, 1,500 lb holding force.

    💾 Download Original PDF 🛒 View Product
    Full text manual (for reference)

    Specification sheet for the SECO-LARM SD-993B-SS Concealed Electric Bolt Lock — a 1,500lb holding-force plunger lock for remote access and exit control of aluminum and steel doors or gates.

    Overview

    The SD-993B-SS provides concealed security for remote access and exit control of aluminum and steel doors or gates. It works with sliding, single-action, and double-action (swing-through) doors and gates. Plated steel plugs and a magnetic bond hold doors securely in place with approximately 1,500 pounds (680kg) of shear holding force.

    Features

    • Concealed security for remote access and exit control of aluminum and steel doors or gates
    • Smaller size, suitable for use with most metal door jambs
    • Zinc-plated magnet and armature, aluminum anodized housing
    • Works with sliding, single-action, and double-action (swing-through) doors and gates
    • Use with an optional digital keypad for keyless high security — easily connects to SECO-LARM's SK-983A Electronic Keypad
    • Spring-loaded locking bolts and magnetic bond hold doors securely with approximately 1,500 lbs (680kg) of shear holding force
    • Fail-safe operation (unlocks if power is lost)
    • Armature plate adjusts to compensate for gaps between door and frame

    Specifications

    Spec Value
    Model SD-993B-SS
    Operating voltage 12VDC or 24VDC
    Current draw 420mA @ 12VDC, 210mA @ 24VDC
    Door gap Max. 1/16" (2mm)
    Holding force Approx. 1,500 lb (680 kg) shear
    Weight Approx. 2lb 8oz (1.1kg)

    Dimensions

    Magnet assembly: 7-1/8" x 5-13/16" (180 x 147mm). The armature adjustment screws compensate for the gap between door and frame (max. 2mm gap), and the armature assembly includes locking bolts and a push-off button.

    Manufacturer

    SECO-LARM® — 16842 Millikan Avenue, Irvine, CA 92606. Phone: 1.949.261.2999 (CA & Int'l) / 1.800.662.0800, Fax: 1.949.261.7326. www.seco-larm.com