MS51968 fine-thread finished hex nuts.

// REFERENCE SIZES

MS51968 part-number and dimension table

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

Dimensions are minimum–maximum limits in inches from the reviewed reference. Width across flats is the distance between opposite hex faces; thickness is the nut’s axial height. Across-flats limits describe the part, not the tolerance of a wrench or socket.

// ORDERING EXAMPLES

Read the complete part number

MS51968-2 is a 1/4-28 Grade B reference; MS51968-3 is Grade C. MS51968-14 is a 1/2-20 Grade B reference; MS51968-15 is Grade C. The diameter and grade can match a coarse-thread nut while the pitch remains different.

// MATERIAL AND FINISH

Retain the material and finish requirement

The selected rows are cadmium-plated carbon steel in Grade B or Grade C. The reviewed specification requires finished nuts to meet the proof-load requirements of its procurement specification. The grade letters belong to the material classification; the listed ordering number uses the MS series and dash number. Do not infer proof load from dimensions alone.

// FAMILY COMPARISON

Compare related nut families

MS51967 uses coarse internal threads. MS35650 is a fine-thread machine-screw nut family with its own thickness limits. Confirm the complete thread, grade, material, finish and dimensional envelope when reviewing a requirement.

// DRAWING REQUIREMENTS

Match the governing specification issue

Dimensions summarize MS51968C, sheets 1–2, 30 March 1970.

The DLA record lists this family as inactive. The table summarizes selected historical dimensional references for purchasing identification; retain the governing issue and application requirements from your drawing.

Include the complete designation, quantity, required delivery date and certificate or traceability requirements with your inquiry.