How it connects
The cylindrical stud inserts vertically into a mating socket or bearing cup in the bottom door bracket, bearing the axial vertical load of the door while permitting low-friction rotational movement.
Male and female halves
Male cylindrical stud mating with a female pivot socket or bearing recess.
Usually connects to
- Matching storefront-door bottom/offset pivot-arm socket or shoe
- Matching oilite bronze bushing or needle/ball-bearing receiver
Common sizes
- Common pivot pins span 5/16–3/4 in (about 8–19 mm), with many storefront examples 3/8–1/2 in.
- A common offset is 3/4 in, with up to 1/8 in vertical adjustment; offset is separate from pin diameter.
Where it is used
commercial storefront doorsarchitectural offset and center-hung pivot doorsaluminum entrance systemscommercial architectural entrancesaluminum storefront doorsglass entrance systems
Variations
- threaded height-adjustable pivot stud with hex nut
- fixed threshold-mount pivot stud
- flanged pivot spindle with roller/ball bearing
- 3/4 inch offset pivot stud
- center hung pivot stud
- flush door pivot stud
- 1/8 inch recessed pivot stud
How to recognise it
A solid, unthreaded cylindrical stud projecting upward from a jamb or threshold bracket (frequently mounted on a threaded shank with a hex nut for door vertical clearance adjustments).
Often confused with
| Confused with | How to tell them apart |
|---|---|
| Top pivot retractable pin | Top pivot pins are spring-loaded or retractable via a screw mechanism to install/remove the door, whereas bottom pivot studs are rigid load-bearing posts (often height-adjustable with a jam nut). |
| Butt hinge pin | Butt hinge pins pass through interlocking knuckles on a surface leaf, whereas a storefront pivot stud is an isolated vertical pin mounted to a frame/floor bracket supporting an offset door arm. |
| Floor closer spindle | Concealed floor closer spindles usually have splined, cam-shaped, or rectangular driving profiles to transfer spring and hydraulic torque, whereas a pivot stud is a passive smooth round pin. |
Also called
bottom pivot studfloor pivot studthreshold pivot studcommercial door pivot pinoffset pivot hinge studstorefront door bottom pivot spindleoffset pivot post
Good to know
Often forms the lower load-bearing component of 3/4-inch offset or center-hung commercial door pivot sets (common brands include Kawneer, US Aluminum, Vistawall, and YKK).
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