F-20
Concentricity Gage
The Universal Punch F-20 is the 10–50 mm F-Series Recess Fastener Checker Gage. It combines the -20 working envelope with Universal Punch's purpose-built Recess Checking Carrier for recess fastener inspection.
Built for medium-size recess fastener inspection.
The Universal Punch F-20 is a Recess Fastener Checker Concentricity Gage. Published F-20 general data covers part diameters from 3/8–2 in (10–50 mm) and part lengths up to 6 in (152 mm).
What separates the F-20 from other -20 models is its measurement architecture. The F-Series uses a Recess Checking Carrier, while other Universal Punch families may use a standard, vertical, side, shaft, or other carrier arrangement. The correct model is therefore selected from both the part size and the feature that must be inspected.
Review the F-20 when the workpiece falls within the -20 size class and the inspection objective is recess fastener checking. Universal Punch can then match the rollers, probe or attachment, indicator, stops, and accessories to the actual print.
See the measurement system clearly.
These views show the complete F-20 platform, the recess-checking / indicator area, and the workpiece-support architecture. The photography is intentionally product-first, without speculative callouts or added diagrams.
The size class and carrier architecture work together.
Universal Punch model families identify the measurement architecture; the numerical suffix identifies the capacity class. For the F-20, F-Series means Recess Fastener Checker and -20 means the 10–50 mm diameter class.
The F-Series is the Universal Punch family documented for recess fastener checking.
The carrier architecture is the defining measurement distinction of the F-Series.
Published for 3/8–2 in diameter parts and lengths up to 6 in / 152 mm.
Rollers, indicator, probe, stops, and accessories are selected for the inspection requirement.
F-20 specifications.
These are the published Universal Punch F-20 general-data values. Use them as the starting envelope, then confirm the final roller, carrier, indicator, probe, calibration, and accessory configuration against the actual workpiece.
Model. Rollers. Indicator & accessories.
Universal Punch defines the Concentricity Gaging System around three primary selections. The F-20 establishes the model family and capacity; the remaining components are matched to the workpiece and measurement objective.
The F-20 establishes the F-Series Recess Fastener Checker architecture and 10–50 mm / 3/8–2 in size class.
Published -20 choices include Full Plain 120-20FP, Half Plain 120-20HP, and Quarter Plain 120-20QP roller sets.
Indicator, recess probe or checking attachment, top roller, stops, and data requirements are matched to the feature being inspected.
The 3/4 × 9/32 in (19 × 7 mm) top roller is listed as standard for -20 gages, with several additional -20 top-roller sizes available. Universal Punch should match the contact geometry to the workpiece.
Universal Punch documentation discusses optional powered systems generally, but the current model-specific motor list does not enumerate a dedicated F-20 motor assembly. Confirm any powered F-20 requirement with engineering.
Configure the measurement around the feature.
Universal Punch documents several attachment and probe categories for F-10 and F-20 recess-checking applications. Final selection depends on the fastener geometry, recess form, inspection relationship, indicator access, and acceptance criteria.
Choose the architecture, not just the size.
The F-20 and B-20 share the 10–50 mm size class, but they do not use the same carrier architecture. The F-10 shares the F-Series recess-checking architecture but serves the smaller 3–25 mm class. This is why model selection should start with both the workpiece envelope and the measurement objective.
Send us your print. We'll help configure the F-20.
Every F-20 application starts with the actual part. Send Universal Punch the drawing and inspection requirement and our team can review the appropriate rollers, recess-checking attachment, indicator, stops, and accessories for the application.
F-20 questions, answered.
What is the Universal Punch F-20 Concentricity Gage?
What part sizes can the F-20 inspect?
How is the F-20 different from the F-10?
How is the F-20 different from the B-20?
Which main rollers are published for the F-20 size class?
What F-Series attachments are documented for the F-20?
How is an F-20 system configured?
What accuracy classifications are documented for -20 Universal Punch concentricity gages?
Can the F-20 be motorized?
Ready to review an F-20 application?
Send Universal Punch your print and inspection requirement. We can review whether the F-20 is the correct architecture and help determine the rollers, recess-checking attachment, indicator, stops, accessories, accuracy classification, and calibration requirements for the job.