Three product groups on a dark workbench — hand-connect couplings, blind-mate pairs and a manifold section, held to the right with the left of the frame kept clear (generated image)

Three lines · one loop

Products — UQD Couplings,
UQDB Blind-Mate & Rack Manifolds

A hand-connect line, a blind-mate line and the rack manifolds they plug into. One part-number system, one test regime, one shipment — so the whole loop can be sourced in one place.

Request spec sheet

Bores · UQD 1/8"–1/2"UQD02–08 · per OCP UQD specification

Bores · UQDB UQDB03–06UQDB03/04/06 · per OCP UQDB specification

Ports per rack 42–52industry-published benchmark

Three lines, one ledger

Scope per line · every figure carries its level

One hand-connect coupling pair, plug and socket joined, filling the frame (generated image)

UQD · hand-connect couplings

1/8", 1/4", 3/8", 1/2" — UQD02, UQD04, UQD06, UQD08; dry-break on connect and disconnect. Bore sizes and the dry-break requirement are specification values (per OCP UQD specification).

UQD line

One blind-mate pair, plug and receptacle facing each other, bare stainless (generated image)

UQDB · blind-mate couplings

UQDB03 (1/8", non-spill structure only), UQDB04 (1/4"), UQDB06 (3/8"). Blind-mate is its own document family, with a sliding self-alignment interface (per OCP UQDB specification).

UQDB line

A short vertical manifold section with one row of ports (generated image)

Rack manifolds · vertical & horizontal

EIA 42U / 48U / 52U and ORv3 44OU frames; 42–52 connection points per rack. Rear-0U vertical and front horizontal forms both support top or bottom feed, one or both sides (industry-published benchmark).

Manifold line

Seven couplings in two rows: four hand-connect bores above three blind-mate bores, on a dark plate (generated image)

Seven size tiers, three lines

Orderable tiers only · UQDB05 is not a published size

The orderable matrix in one frame · UQD02/04/06/08 · UQDB03/04/06

UQD · four hand-connect bores

UQD02 1/8" bore
per OCP UQD specification
UQD04 1/4" bore
per OCP UQD specification
UQD06 3/8" bore
per OCP UQD specification
UQD08 1/2" bore
per OCP UQD specification

UQDB · three blind-mate bores

UQDB03 1/8" · non-spill structure only
per OCP UQDB specification
UQDB04 1/4" bore
per OCP UQDB specification
UQDB06 3/8" bore
per OCP UQDB specification

One plate per line

UQD Four bores, one ascending row
UQDB The blind-mate family on a dark ground
Manifolds Vertical 0U on a rear post

Brushed-metal grain crossing a cold dark field, low contrast (generated image)

Which segment takes which bore

Application split · industry guide

Supply on the upper rule · return on the lower one; the marked head is the return direction (the accent event of this screen).

CPU + GPU cold plate loops: UQD04 · 1/4"
High-density multi-node: UQD06 · 3/8"
Rack & CDU backbone: UQD08 · 1/2"

Send the loop drawing for a sizing cross-check

Red and blue are specified, not decorative

Marking & traceability · per OCP UQD specification

Close-up of coupling cap rings and laser-marked flats, markings unreadable (generated image)

Supply Colour coding at the coupling is a specification requirement: supply and return are separated at the joint (per OCP UQD specification).
Return Drawn in steel on this page. The second specification colour is not part of this site's palette; the real anodised colours appear in the photographs only.
Laser mark Part number and serial are laser-marked on the flat. The serial is what a maintenance team reads to place the part in the loop, and what ties it to the record.

A set of UQD couplings on a dark ground, anodised rings beside bare stainless (photograph) — Anodised rings and bare stainless, same ground Photograph

Will it fit the rack you already own

Mounting & frame fit · industry-published benchmark

An open rack frame with a manifold on the rear post, braided hose alongside (generated image)

EIA 42U / 48U / 52U · ORv3 44OU — one tick per rack unit; values overlaid as mono, never inside the drawing.

01
Vertical, rear 0U. The manifold hangs on the rear posts and costs no front bay (industry-published benchmark).
02
Horizontal, front. A cross-member form when the rear is already occupied (industry-published benchmark).
03
Feed and sides. Top or bottom feed; single-sided or double-sided, 42–52 connection points per rack (industry-published benchmark).

An abstract dark industrial field with one faint horizontal haze band (generated image)

Loop sizing review

Send the loop drawing.
Get a sizing reply.

Name the segments and the rack standard.