Equipment reference / Interior 1KFS keyswitches: standard and Best Core listings

Interior 1KFS keyswitches: standard and Best Core listings

Compare the two exact interior flush-mount identifiers, their shared Open/Close/Stop behavior and the stated Best Core cylinder variant.

US source scopeReference updated 2026-09-13

Identification details & limits

Reference identifier: Interior 1KFS keyswitches: standard and Best Core listings. Compare each listed detail with the exact product and the source document. Do not submit a personal serial number or access code to this website.

Denco accessory source: COA 1KFSProduct detail title, literal identifiers and recorded technical facts · checked 2026-09-12 · Denco
Denco accessory source: COA 1KFS-BCProduct detail title, literal identifiers and recorded technical facts · checked 2026-09-12 · Denco

Identification and scope details from the cited sources; each row retains its source locator.
Exact supplier identifier	COA 1KFS Denco accessory source: COA 1KFSProduct detail title and exact supplier SKU · checked 2026-09-12 · Denco
COA 1KFS	1KFS is a flush-mount key switch with a stop function and Open/Close operation returning to center. Denco accessory source: COA 1KFSProduct detail title and Description list · checked 2026-09-12 · Denco
COA 1KFS	The faceplate line lists 6 inches high, 4 3/4 inches wide and a third value of 2 7/8 inches. Denco accessory source: COA 1KFSProduct detail title and Description list · checked 2026-09-12 · Denco
COA 1KFS	The title identifies an interior version. Denco accessory source: COA 1KFSProduct detail title and Description list · checked 2026-09-12 · Denco
Exact supplier identifier	COA 1KFS-BC Denco accessory source: COA 1KFS-BCProduct detail title and exact supplier SKU · checked 2026-09-12 · Denco
COA 1KFS-BC	1KFS is a flush-mount key switch with a stop function and Open/Close operation returning to center. Denco accessory source: COA 1KFS-BCProduct detail title and Description list · checked 2026-09-12 · Denco
COA 1KFS-BC	The faceplate line lists 6 inches high, 4 3/4 inches wide and a third value of 2 7/8 inches. Denco accessory source: COA 1KFS-BCProduct detail title and Description list · checked 2026-09-12 · Denco
COA 1KFS-BC	The title identifies a Best Core cylinder version. Denco accessory source: COA 1KFS-BCProduct detail title and Description list · checked 2026-09-12 · Denco
Source scope and missing specifications	The third faceplate dimension has no axis label; it is not verified as depth. Denco accessory source: COA 1KFSProduct detail scope and omitted fields · checked 2026-09-12 · Denco
Source scope and missing specifications	No keying code, separate cylinder identifier, electrical rating or named-operator fitment is supplied. The tamperproof advertising is not a verified security rating. Denco accessory source: COA 1KFSProduct detail scope and omitted fields · checked 2026-09-12 · Denco

Sources & review dates

Denco accessory source: COA 1KFSDenco · US · checked 2026-09-12
Denco accessory source: COA 1KFS-BCDenco · US · checked 2026-09-12

This independent reference preserves the source’s stated scope. It does not report an Anderson installation inspection, product test or safety clearance.

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The cited sources define the product details shown here; comparison does not establish fitment. Anderson’s repair service covers its listed Connecticut communities; this national reference does not imply nationwide service.