81PC STEEL GAUGE BLOCK SET GRADE B

Precision starts with accuracy, and the B4029 81-piece steel gauge block set is built for it. Crafted to meet the strictest standards, each block in this set is manufactured under carefully controlled conditions for dependable dimensional accuracy. Ideal for inspection, calibration, and precision machining tasks, this set delivers trusted performance at a standard temperature of 68°F (20°C).

Each block is serial-numbered and accompanied by a certificate of inspection that lists its individual deviation, ensuring traceability and confidence in your measurements. Engineered to resist corrosion and surface damage, the set is built to last—making it a staple in any high-precision workshop.

Key Features:

• Precision-manufactured under controlled conditions for accuracy at 68°F (20°C)

• Each set includes 81 steel gauge blocks

• Blocks are corrosion- and wear-resistant to ensure long-term performance

• All blocks come with individual serial numbers for traceability

• Includes a certificate of inspection detailing deviation for each block

• Conforms to and exceeds:

  • Federal Specification GGG-G-15C

  • ASME B89.1.9-2002 (P900-S582, P900-S583)

  • GGG-G-15C (P900-S581)

• Coefficient of thermal expansion: 6.4 x 10⁻⁶/°C

Specifications:

• Total Pieces: 81
• Grade: B

• Material: Hardened steel

• Standard Reference Temperature: 68°F (20°C)

• Thermal Expansion Coefficient: 6.4 x 10⁻⁶/°C

• Compliance: GGG-G-15C, ASME B89.1.9-2002

• Finish: Lapped for exceptional surface flatness and parallelism

• Accuracy: Precision matched to industry standards

Comes With:

• 81 precision-ground steel gauge blocks

• Sturdy wooden storage case with foam inserts for protection

• Certificate of inspection listing deviations per block

• Serialized tracking for calibration records