Rivet Row Layout

D = drill hole
Edge entered
Pitch 4D–6D
Count fewest first
Datum left edge

Span: first rivet to last rivet

Measured from the first marked rivet point to the last, each one edge distance in from its edge. Inches as 9.2, 9 3/16, 9-3/16 or 147/16. The tool adds the edge distance at each end to find the overall length.

Rivet size (D) · common-practice drill

Measure D from

D for the 2.5D, 4D and 6D rules. Drill hole uses the common-practice drill diameter (−5 → 0.161″).

Edge distance (each end)

Required. Type the edge distance as a decimal (.4) or fraction (13/32), or tap a button to fill in 2.5D rounded up. Distance from each edge to the nearest rivet center.

Rivet type Other / Custom

For your reference only. It doesn't change the edge-distance or pitch rules.

Rivet quantity

Leave blank to start from the fewest rivets that fit. Enter a number when the drawing or SRM gives you a count.

Unofficial tool, not a government website. Verify against approved data. The edge distance you enter and the 4D–6D pitch range are this calculator's settings. The range of rivet counts shows what fits the spacing rules only. How many rivets the joint needs comes from the drawing, SRM or engineering. Drawings, the applicable NAVAIR manuals, the structural repair manual and other controlling technical data take precedence. A passing checklist confirms the arithmetic only, not airworthiness or joint strength.

Ranked layouts

Candidate	Rivets	Spaces	Edge distance	Pitch	Pitch ÷ D	Include

Edge distance is the same for every layout. Ranked fewest rivets first; each extra rivet shortens the pitch. Every count shown fits 4D–6D. Rank is a layout preference, not an engineering approval.

Layout summary

Dimensional validation

Condition	Result

Layout diagram Proportional sketch, not a full-scale template. Use the coordinate table for measurements.

Hole-center coordinates Absolute distance from the left datum (X = 0)

Mark-point reference Layouts side by side, nearest 1/64″ mark and exact decimal

Measure from