Denco supplier catalog / Part reference

GDH 3-40-1: Bottom Bracket, BB90

BB90 bottom bracket dimensions are 7 7/8 inches by 3 inches wide with a 1 3/8-inch side flange.

US source scopeUpdated 2026-09-12Independent Anderson reference

Match the whole number.

Denco catalog number: GDH 3-40-1. Keep the complete supplier number, including prefixes and suffixes. This identifies the supplier catalog listing.

A corresponding manufacturer part number or equivalent component has not been verified. Any manufacturer or designation stated by the supplier is labeled separately below.

Denco hardware source: GDH 3-40-1Product detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco

Denco hardware source: GDH 3-40-1Product detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco

Values apply to the exact identifier and scope in the cited source.
Supplier identification fact	BB90 bottom bracket dimensions are 7 7/8 inches by 3 inches wide with a 1 3/8-inch side flange. View source and citation details Denco hardware source: GDH 3-40-1Product detail title and Description list · checked 2026-09-12 · Denco
Supplier identification fact	The cable attachment is a Milford pin; Denco specifies 2-inch track. View source and citation details Denco hardware source: GDH 3-40-1Product detail title and Description list · checked 2026-09-12 · Denco
Supplier identification fact	The listing describes a pair. View source and citation details Denco hardware source: GDH 3-40-1Product detail title and Description list · checked 2026-09-12 · Denco
Scope and source limitation	Track-size statements do not establish fitment to every door using that track size. View source and citation details Denco hardware source: GDH 3-40-1Product detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco
Scope and source limitation	Keep the supplier identifier separate from similarly numbered manufacturer or catalog parts. View source and citation details Denco hardware source: GDH 3-40-1Product detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco

Compare the BB6, BB100 and BB90 bottom brackets

Compare overall dimensions, flange details and the listed cable attachment or included pins. Keep the supplier track-size scope separate from door fitment. BB100's side-flange unit is not stated; do not borrow a unit from another bracket.

Separate references with their own source scope. This comparison establishes no replacement or interchangeability.
Exact reference	Recorded distinctions
GDH 3-42-1K	GDH 3-42-1K: Bottom Bracket, BB6 BB6 bottom bracket is 10 5/8 inches long by 4 3/8 inches wide. View source and citation details Denco hardware source: GDH 3-42-1KProduct detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco Supplier identification fact: BB6 bottom bracket is 10 5/8 inches long by 4 3/8 inches wide. View source and citation details Denco hardware source: GDH 3-42-1KProduct detail title and Description list · checked 2026-09-12 · Denco Supplier identification fact: Side and bottom flanges are each 1 1/2 inches. View source and citation details Denco hardware source: GDH 3-42-1KProduct detail title and Description list · checked 2026-09-12 · Denco Supplier identification fact: Denco specifies 2-inch and 3-inch track; clevis and cotter pins are included, and the listing describes a pair. View source and citation details Denco hardware source: GDH 3-42-1KProduct detail title and Description list · checked 2026-09-12 · Denco Scope and source limitation: Track-size statements do not establish fitment to every door using that track size. View source and citation details Denco hardware source: GDH 3-42-1KProduct detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco Scope and source limitation: Keep the supplier identifier separate from similarly numbered manufacturer or catalog parts. View source and citation details Denco hardware source: GDH 3-42-1KProduct detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco Read GDH 3-42-1K’s pairing status and source conditions →
GDH BB100K	GDH BB100K: Bottom Bracket, BB100 BB100 bottom bracket is 5 11/16 inches long by 2 11/16 inches wide. View source and citation details Denco hardware source: GDH BB100KProduct detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco Supplier identification fact: BB100 bottom bracket is 5 11/16 inches long by 2 11/16 inches wide. View source and citation details Denco hardware source: GDH BB100KProduct detail title and Description list · checked 2026-09-12 · Denco Supplier identification fact: The source gives the side flange as 1 1/4 without an explicit unit on that bullet. View source and citation details Denco hardware source: GDH BB100KProduct detail title and Description list · checked 2026-09-12 · Denco Supplier identification fact: Milford pin cable attachment and 2-inch track use are specified. View source and citation details Denco hardware source: GDH BB100KProduct detail title and Description list · checked 2026-09-12 · Denco Scope and source limitation: Track-size statements do not establish fitment to every door using that track size. View source and citation details Denco hardware source: GDH BB100KProduct detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco Scope and source limitation: Keep the supplier identifier separate from similarly numbered manufacturer or catalog parts. View source and citation details Denco hardware source: GDH BB100KProduct detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco Scope and source limitation: The flange measurement has no stated unit. View source and citation details Denco hardware source: GDH BB100KProduct detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco Read GDH BB100K’s pairing status and source conditions →
GDH 3-40-1 This reference	GDH 3-40-1: Bottom Bracket, BB90 BB90 bottom bracket dimensions are 7 7/8 inches by 3 inches wide with a 1 3/8-inch side flange. View source and citation details Denco hardware source: GDH 3-40-1Product detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco Supplier identification fact: BB90 bottom bracket dimensions are 7 7/8 inches by 3 inches wide with a 1 3/8-inch side flange. View source and citation details Denco hardware source: GDH 3-40-1Product detail title and Description list · checked 2026-09-12 · Denco Supplier identification fact: The cable attachment is a Milford pin; Denco specifies 2-inch track. View source and citation details Denco hardware source: GDH 3-40-1Product detail title and Description list · checked 2026-09-12 · Denco Supplier identification fact: The listing describes a pair. View source and citation details Denco hardware source: GDH 3-40-1Product detail title and Description list · checked 2026-09-12 · Denco Scope and source limitation: Track-size statements do not establish fitment to every door using that track size. View source and citation details Denco hardware source: GDH 3-40-1Product detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco Scope and source limitation: Keep the supplier identifier separate from similarly numbered manufacturer or catalog parts. View source and citation details Denco hardware source: GDH 3-40-1Product detail title and Description list; explicit table cells where recorded · checked 2026-09-12 · Denco Read GDH 3-40-1’s pairing status and source conditions →

A specification absent from one reference is not established by the other. Keep the exact identifier, configuration and cited revision when comparing.

Documented fitment & exclusions

Read the exact equipment or component, market, production and variant limits in every row. An omitted pairing has not been verified by this reference.

No equipment or component pairing is verified in this published reference. Match the exact equipment with Denco catalog source before selecting a component.

Direct replacement paths

No direct successor for GDH 3-40-1 is verified in this reference.

A direct replacement statement does not establish reverse interchangeability, a kit equivalent or a later replacement chain.

This reference has no documented compatible or incompatible pairing to check. Use the facts and source scope above to identify the item. You can also look up another part or accessory. A missing pairing does not establish incompatibility.

Recall references

No recall reference is included for this identifier in the published dataset. This is not a safety clearance or proof that no recall exists.

Sources & scope

Denco hardware source: GDH 3-40-1Denco · US · checked 2026-09-12

Anderson prepared this reference from the listed evidence. Source statements are not an Anderson installation inspection or independent product test. Official documents stay on their publisher’s website.

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