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3/8 hex slotted nut envelope

3/8 hex slotted nut envelope: hex 9/16 in across flats (basic) × 21/64 in high (H basic), six slots 0.15 in wide (S max) to the unslotted thickness T max 0.21 in (slot depth 3.00 mm), bore Ø9.52 mm (3/8 in thread major diameter as a plain cylinder); no chamfers, thread or washer face

Exact dimensions. True size, no tolerance added. Threads are plain cylinders at the major diameter.

STEP STL free, CC BY 4.0 (credit "Xem Studio")

From the full sheet

Slotted and castle nuts, inch (ASME B18.2.2): hex slotted 1/4 to 2 in, castle 1/4 to 1-1/4 in — across flats, height, slot width, cotter hole + envelope models: every size, notes, mating features and sources. What are the dimensions of a 3/8 or 1/2 inch slotted (castle) nut, and what cotter pin goes with it?

Other sizes

• 1/4 hex slotted nut envelope
• 1/2 hex slotted nut envelope
• 5/8 hex slotted nut envelope
• 3/4 hex slotted nut envelope
• 1/4 hex castle nut envelope
• 1/2 hex castle nut envelope
• 3/4 hex castle nut envelope