MS90726 Grade 5 fine-thread hex cap screws.

// REFERENCE SIZES

MS90726 part-number and dimension table

Reference sizes for identification and quotation. Webson confirms availability by inquiry; these rows do not indicate stocked inventory.

Head across-flats width and axial head height are minimum–maximum drawing limits in inches. Length values preserve the reviewed table’s decimal references, including 0.438 and 0.562; they do not add acceptance tolerances. Across-flats limits describe the screw head, not the tolerance of a wrench or socket.

// MEASUREMENT GUIDE

Measure under-head length and head dimensions

Length L runs from the bearing surface beneath the head to the tip. H is the axial head height; F is the width between opposite hex faces. The head is outside the under-head length measurement.

Thread length is a separate requirement. The reviewed issue uses a minimum rule of twice the nominal diameter plus 1/4 inch, with a positive allowance and separate provisions for screws too short to provide that thread length. Use the full governing issue for those limits. A listed screw length is not a fixed grip length or a claim that the screw is fully threaded.

// ORDERING EXAMPLES

Read the complete part number

MS90726-3 is a 1/4-28 reference with a 0.500-inch under-head length. MS90726-109 is a 1/2-20 reference with a 1.000-inch under-head length. Use the full series and dash number when ordering.

// MATERIAL AND CONFIGURATION

Preserve the finish and locking requirement

The reviewed MS90726B reference specifies medium carbon steel, Grade 5, with cadmium plating under its procurement specification. Include the required issue, finish and certification requirements with the quote request.

// FAMILY COMPARISON

Compare the four hex cap screw families

Compare grade, thread, finish and governing issue together. A similar head size does not establish an approved substitution. Select mating nuts and washers to the application’s strength, finish and dimensional requirements.

// DRAWING REQUIREMENTS

Match the governing drawing issue

Dimensions summarize MS90726B, sheets 1–2, 1 May 1969. These are selected historical references for purchasing identification. The issue required by your drawing controls full dimensions, thread length, material, coating, locking and inspection requirements.