Search by part number, series, material, application, or specification.
Press Enter to view all results Esc to close
Ball Ø 0.563 / 1/4-28-2BES250 is a compact inch ball joint with a 1/4-28-2B female socket and a 1/4-28-2A male stud — a staked design with a rubber grommet shell. Overall length L = 0.438 in., ball housing diameter G = 0.563 in., flange thickness F = 0.469 in., body width P = 0.500 in., overall height N = 0.969 in., body reach C = 1.219 in.
The ES series uses a carbon steel 1045 housing, a carbon steel 1045 ball stud, and a rubber grommet shell. Silver or yellow zinc plating provides corrosion resistance for OEM and replacement-duty use. Suitable for compact control-link systems, fabricated linkage assemblies, throttle and brake linkages, and OEM replacement applications where a staked ball-joint socket with female-to-male thread connection is required.
Left-hand thread version available by adding ‘LH’ suffix. Yellow zinc plating available on request. Metric equivalent is the CS series.
All available sizes in the ES Series Grommet Style Ball Joint series. Can’t find your size? Contact us for custom dimensions.
| PART NO. | M | M1 | L | G | F | P | N | C |
|---|---|---|---|---|---|---|---|---|
| ES187 | 10-32-2B | 10-32-2A | 0.375 | 0.438 | 0.438 | 0.438 | 0.875 | 1.063 |
| ES250 | 1/4-28-2B | 1/4-28-2A | 0.438 | 0.563 | 0.469 | 0.500 | 0.969 | 1.219 |
| ES312 | 5/16-24-2B | 5/16-24-2A | 0.500 | 0.688 | 0.531 | 0.563 | 1.125 | 1.406 |
| ES375 | 3/8-24-2B | 3/8-24-2A | 0.625 | 0.875 | 0.688 | 0.750 | 1.375 | 1.688 |
| ES438 | 7/16-20-2B | 7/16-20-2A | 0.750 | 1.125 | 0.875 | 1.000 | 1.938 | 2.375 |
| ES500 | 1/2-20-2B | 1/2-20-2A | 0.750 | 1.125 | 0.875 | 1.000 | 1.938 | 2.375 |
| ES625 | 5/8-18-2B | 5/8-18-2A | 0.875 | 1.125 | 1.000 | 1.000 | 2.063 | 2.578 |
Material certifications verified. Composition confirmed by spectrometer before machining begins.
100% go/no-go gauge check on all threaded sections. Zero tolerance on dimensional non-conformance.
Static and dynamic load tests run on representative samples from each production batch.
CMM verification of critical dimensions — ball diameter, bore, thread pitch, and body length.
Visual and tactile inspection for burrs, scratches, surface cracks, and plating defects.
Misalignment angle and torque measured to confirm liner performance meets specification.
Hardness tests confirm proper heat treatment on chromoly steel bodies and bearing balls.
Full traceability from raw material heat number to finished part. COC and inspection reports available.
Share your part number, required quantity, and any special material or packaging requirements. We respond within 24 hours.
The ES250 is a compact inch-series staked ball joint suited to compact control-link systems, fabricated linkage assemblies, throttle and brake linkages, and OEM replacement applications needing a female-to-male threaded ball-joint socket.
The ES250 has a 1/4-28-2B female socket thread and a 1/4-28-2A male stud thread.
Ball housing diameter (G) is 0.563 in., overall length (L) is 0.438 in., flange thickness (F) is 0.469 in., body width (P) is 0.500 in., overall height (N) is 0.969 in., and body reach (C) is 1.219 in.
The housing and ball stud are both carbon steel 1045, with a rubber grommet shell forming the staked joint.
Standard finish is silver zinc plating, with yellow zinc plating available on request; a left-hand thread version can be ordered by adding the 'LH' suffix.
The metric equivalent of the ES inch series, including the ES250, is the CS series.
