This heavy-duty slide-rule calculator provides fast, accurate data required most frequently by designers, engineers and drafting personnel. Based on current ISO and ASME B18 Standards, the ENGINEER'S QUICK REFERENCE CALCULATOR™ will easily reference data for:

• MACHINE SCREWS

M1.6 to M42 with head height and diameter for popular configurations including hex, hex flange, slotted, cross recessed and socket head screws (with socket size and counterbore diameter). Includes pitch-mm, TSA-mm2, and tap drill data for each fastener diameter.

• SET SCREWS

M1.6 to M24 with half-dog, flat, oval and cup point defining point length, diameter and radius. Includes pitch-mm, TSA-mm2, and tap drill data.

• SHOULDER SCREWS

M6.5 to M25 with head height and diameter, socket size, shoulder diameter, thread length and thread diameter/pitch.

• WASHERS

M1.6 to M36 plain and spring lock, with outside diameter and thickness.

• HEX NUTS

M1.6 to M36 with hex, hex jam and hex flange defining dimensions across corners, across flats and thickness.

• ALUMINUM RIVETS

M1.6 to M10 flat and universal head with head height/diameter, and approximate material for full head.

• SPRING PINS

M1.5 to M12 with recommended hole diameter ranges.

• DRILLED HOLE TOLERANCES

ISO Class H13 with diameter ranges from 0.0mm to 50mm.

• DATA TABLES

The reverse side of the calculator contains quick reference tables for:

• Fraction/Decimal/Metric Equivalents - from 1/64" to 1" by 64ths.
• Inch/Pound Metric Conversion Factors - for area, force, length, mass, stress, torque and volume.
• Metric Drill Sizes - M1.6 to M42 with decimal inch equivalents.
• Normal Clearance Holes - M1.6 to M42 for bolts, screws and studs.