Description
Product Overview
The HFS Ultra Precision 1-2-3 Blocks set is engineered for professionals who demand the highest level of dimensional accuracy in their daily workflow. Each block is machined from premium tool steel that has been heat‑treated and case‑hardened to achieve a hardness range of HRC 56‑60, ensuring that the surfaces remain true and resistant to wear even after thousands of inspections. The set contains two blocks, each measuring 1″, 2″ and 3″ respectively, with a guaranteed tolerance of .0001″ on squareness, parallelism and height when used as a pair. This level of precision is essential for calibrating measuring instruments, setting up machine tools, and verifying the geometry of workpieces in a variety of industrial environments.
![[Product front view showing all components]](https://www.fabledmart.store/wp-content/uploads/2026/07/5cc7d47197624b728b2820ff0db6da56.jpg)
Usage
Designed with versatility in mind, these gage blocks are ideal for machinists, woodworkers, metalworkers, and quality control technicians who need reliable reference standards on the shop floor or in a laboratory. The included stainless steel socket head cap screw and hex key allow users to lock the blocks together securely, creating a stable reference plane for checking the flatness of surfaces, the alignment of machine axes, or the height of components. The compact plastic case protects the blocks from dust, impact, and moisture, making it easy to transport the set between job sites or store it safely when not in use. Whether you are setting up a CNC mill, calibrating a surface plate, or performing routine inspection of fabricated parts, the HFS Ultra Precision blocks provide the confidence that measurements are within the tightest tolerances.
Why Choose Us
When selecting dimensional calibration tools, the quality of the material and the consistency of the manufacturing process are critical factors. HFS (HardwareFactoryStore.com) has a long history of supplying industrial-grade equipment that meets or exceeds industry standards. Each block undergoes a rigorous inspection process that includes laser interferometry verification to confirm that the .0001″ accuracy specifications are consistently met. In addition, the blocks are packaged with a custom‑molded plastic case that not only safeguards the product but also provides organized compartments for the screw and hex key, reducing the risk of lost accessories. Our commitment to customer satisfaction extends beyond the point of sale; we offer responsive technical support, a clear warranty policy, and easy access to replacement parts should any component become damaged under normal use.
Key Features
- Exceptional .0001″ accuracy ensures reliable calibration for high‑precision applications
- Heat‑treated, case‑hardened tool steel provides long‑lasting durability and wear resistance
- Includes a stainless steel socket head cap screw and hex key for secure block alignment
- Compact, impact‑resistant plastic case offers organized storage and easy transport
- Responsive after‑sales support and warranty give peace of mind for professional users
FAQ
What is the maximum load these blocks can withstand?
The blocks are designed to handle typical inspection loads up to 150 kg without deformation, making them suitable for most shop‑floor applications.
Can the blocks be used with other gage block sets?
Yes, the 1‑2‑3″ sizes are standard and can be combined with additional blocks from other manufacturers to create longer reference lengths.
How do I maintain the accuracy of the blocks over time?
Store the blocks in the provided case when not in use, keep them clean and free of oil or debris, and avoid dropping them. Periodic verification with a calibrated surface plate is recommended.
Do you offer replacement screws or cases?
Replacement stainless steel screws, hex keys, and plastic cases are available through our customer service department; simply contact us with the part number.
Is there a warranty on these gage blocks?
All HFS Ultra Precision blocks come with a one‑year limited warranty covering manufacturing defects and material failures under normal use.




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