R-clips, spring cotters and hairpin cotter pins: wire diameter, pin / shaft range, length (DIN 11024, McMaster hairpin sizes) — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/r-clips-hairpin-cotters-din-11024/ (sheet CC BY 4.0) Basis: fasten.it's DIN 11024 table (7 sizes, wire 2.5 to 8 mm) checked against Aspen Fasteners' spec sheet (d1, d2, d3, d4, l agree), fasten.it's second 'commonly used' table, and McMaster-Carr's hairpin cotter pin and hairpin clip tables (zinc-plated spring steel, inch and metric); numbers only Catalog version: 2026-10-20 Sizes: see table below - An R-clip (hairpin cotter pin, spring cotter) is a wire clip that passes through the cross hole of a clevis pin and closes round the outside of the pin; the wire diameter and the pin range it serves are the sizes that matter. DIN 11024 (fasten.it: 'cotter pins, Beta type', 01/1973; the example designation is 'Cotter spring 5 DIN 11024') lists d1 (wire, 2.5 to 8 mm), d2 (the pin / bolt diameter range, over 9 up to 56 mm), d3, d4, l1, l2, l3, h, r1 and r2; the sources do not define the letters beyond d1 as the nominal size and d2 as the range, so d3, d4, l and the rest are shown as printed (Aspen's sheet prints d1, d2, d3, d4 and l and they agree). - fasten.it also prints a second table of single-coil spring cotters 'commonly used in the market', not part of DIN 11024: wire 2.5 to 9 mm, pin range, d3, d4, l1, l2; it is shown as its own rows. - McMaster-Carr rows are what McMaster prints under 'For Clevis Pin Dia.', 'Wire Dia.', 'Eye Dia.' and 'Lg.' for zinc-plated spring steel hairpin cotter pins, all rows (inch, then metric, which McMaster lists as DIN 11024 for 9 to 14 mm and 2 mm wire, 57 mm long). McMaster's 18-8 and 316 stainless, 17-7 PH, long-life, cross-leg and mil-spec tables use the same pin ranges with some different wire sizes and lengths; they are not repeated. The hairpin clips table is McMaster's 'shaft dia., wire dia., length, pin opening'. Eye diameter and the lengths differ between the DIN 11024 sizes and McMaster's: for example McMaster's 3 mm wire for 10 to 16 mm pins (72 mm long) is a different wire size from DIN 11024's 3.2 mm for pins over 11.2 to 14 mm (48 mm long), so match the pin range, not the wire. - Not published as numbers in the sources read: the clip's outline (the bend radii are r1, r2 in the DIN table but the layout is not described). No file is drawn for that reason. Split pins for a cross hole: split-pins-iso-1234; clevis pins: clevis-pins-iso-2341. McMaster-Carr sells R-clips with per-part STEP; its R-clip category is linked, not copied. - The existing page pins-clevises-and-joints lists R-clips drawn at the split-pin wire sizes (0.8 to 2 mm) for 3 to 8 mm model pins; these are the full-size DIN and catalogue sizes. table wire diameter pin (clevis pin) diameter range, as printed d3 / d4 / eye / pin opening lengths and other dimensions DIN 11024 (fasten.it; Aspen agrees on d1, d2, d3, d4, l) 2.5 wire 9 to 11.2 mm d3 2.25, d4 20 l 42; l2 24, l3 5.5; h 2.5; r1 5.6, r2 4 DIN 11024 (fasten.it; Aspen agrees on d1, d2, d3, d4, l) 3.2 wire over 11.2 to 14 mm d3 2.8, d4 20 l 48; l2 26, l3 7; h 3; r1 7, r2 5 DIN 11024 (fasten.it; Aspen agrees on d1, d2, d3, d4, l) 4 wire over 14 to 20 mm d3 3.6, d4 20 l 64; l2 32, l3 10; h 4.5; r1 10, r2 6.5 DIN 11024 (fasten.it; Aspen agrees on d1, d2, d3, d4, l) 5 wire over 20 to 26 mm d3 4.5, d4 25 l 80; l2 39, l3 12.5; h 7; r1 13, r2 8 DIN 11024 (fasten.it; Aspen agrees on d1, d2, d3, d4, l) 6.3 wire over 26 to 34 mm d3 5.6, d4 25 l 97; l2 45, l3 16; h 9; r1 17, r2 10 DIN 11024 (fasten.it; Aspen agrees on d1, d2, d3, d4, l) 7 wire over 34 to 45 mm d3 6.3, d4 30 l 125; l2 56, l3 21; h 12.5; r1 22.5, r2 11.5 DIN 11024 (fasten.it; Aspen agrees on d1, d2, d3, d4, l) 8 wire over 45 to 56 mm d3 7, d4 30 l 150; l2 63, l3 25.5; h 17.5; r1 28, r2 12.5 single-coil spring cotter, 'commonly used in the market' (fasten.it, not DIN) 2.5 wire over 9 to 14 mm d3 2, d4 10 l1 50; l2 25 single-coil spring cotter, 'commonly used in the market' (fasten.it, not DIN) 3.5 wire over 10 to 16 mm d3 3, d4 18 l1 60; l2 28 single-coil spring cotter, 'commonly used in the market' (fasten.it, not DIN) 4.5 wire over 16 to 20 mm d3 4, d4 20 l1 60; l2 30 single-coil spring cotter, 'commonly used in the market' (fasten.it, not DIN) 6 wire over 20 to 28 mm d3 5, d4 24 l1 85; l2 40 single-coil spring cotter, 'commonly used in the market' (fasten.it, not DIN) 7 wire over 28 to 40 mm d3 6, d4 30 l1 105; l2 50 single-coil spring cotter, 'commonly used in the market' (fasten.it, not DIN) 8 wire over 28 to 45 mm d3 7, d4 30 l1 105; l2 50 single-coil spring cotter, 'commonly used in the market' (fasten.it, not DIN) 9 wire over 30 to 45 mm d3 8, d4 30 l1 110; l2 55 McMaster hairpin cotter, zinc-plated spring steel 3/64" wire 1/16" to 1/8" eye 1/8" length 7/16" McMaster hairpin cotter, zinc-plated spring steel 1/32" wire 7/64" to 9/64" eye 1/8" length 7/16" McMaster hairpin cotter, zinc-plated spring steel 1/32" wire 1/8" eye 1/8" length 5/8" McMaster hairpin cotter, zinc-plated spring steel 1/32" wire 1/8" to 5/32" eye 1/8" length 9/16" McMaster hairpin cotter, zinc-plated spring steel 3/64" wire 1/8" to 3/16" eye 1/8" length 5/8" McMaster hairpin cotter, zinc-plated spring steel 3/64" wire 3/16" to 1/4" eye 1/8" length 3/4" McMaster hairpin cotter, zinc-plated spring steel 3/64" wire 3/16" to 1/4" eye 1/4" length 15/16" McMaster hairpin cotter, zinc-plated spring steel 3/64" wire 3/16" to 1/4" eye 1/4" length 1" McMaster hairpin cotter, zinc-plated spring steel 1/16" wire 1/4" to 5/16" eye 1/4" length 1 1/8" McMaster hairpin cotter, zinc-plated spring steel 3/64" wire 1/4" to 3/8" eye 1/8" length 7/8" McMaster hairpin cotter, zinc-plated spring steel 3/64" wire 1/4" to 3/8" eye 1/4" length 1 9/16" McMaster hairpin cotter, zinc-plated spring steel 5/64" wire 1/4" to 3/8" eye 1/4" length 1 3/16" McMaster hairpin cotter, zinc-plated spring steel 1/16" wire 1/4" to 1/2" eye 1/4" length 1 5/16" McMaster hairpin cotter, zinc-plated spring steel 3/32" wire 1/4" to 1/2" eye 3/8" length 1 5/8" McMaster hairpin cotter, zinc-plated spring steel 5/64" wire 5/16" to 3/8" eye 1/8" length 1 1/16" McMaster hairpin cotter, zinc-plated spring steel 5/64" wire 5/16" to 3/8" eye 1/4" length 1 7/16" McMaster hairpin cotter, zinc-plated spring steel 3/32" wire 5/16" to 3/8" eye 3/8" length 1 5/8" McMaster hairpin cotter, zinc-plated spring steel 7/64" wire 5/16" to 3/8" eye 1/8" length 1 1/4" McMaster hairpin cotter, zinc-plated spring steel 3/32" wire 5/16" to 1/2" eye 5/8" length 2" McMaster hairpin cotter, zinc-plated spring steel 3/32" wire 3/8" to 7/16" eye 5/8" length 1 7/8" McMaster hairpin cotter, zinc-plated spring steel 1/16" wire 3/8" to 1/2" eye 3/8" length 1 9/16" McMaster hairpin cotter, zinc-plated spring steel 5/64" wire 3/8" to 1/2" eye 3/8" length 1 9/16" McMaster hairpin cotter, zinc-plated spring steel 3/32" wire 3/8" to 5/8" eye 5/8" length 2 5/16" McMaster hairpin cotter, zinc-plated spring steel 1/8" wire 7/16" to 3/4" eye 1/2" length 2 9/16" McMaster hairpin cotter, zinc-plated spring steel 1/8" wire 1/2" to 5/8" eye 5/8" length 2 3/8" McMaster hairpin cotter, zinc-plated spring steel 3/32" wire 1/2" to 3/4" eye 1/2" length 2 1/2" McMaster hairpin cotter, zinc-plated spring steel 1/8" wire 1/2" to 3/4" eye 3/8" length 1 15/16" McMaster hairpin cotter, zinc-plated spring steel 1/8" wire 1/2" to 3/4" eye 1/2" length 1 9/16" McMaster hairpin cotter, zinc-plated spring steel 9/64" wire 5/8" to 3/4" eye 3/4" length 2 9/16" McMaster hairpin cotter, zinc-plated spring steel 1/8" wire 5/8" to 7/8" eye 5/8" length 2 1/2" McMaster hairpin cotter, zinc-plated spring steel 9/64" wire 5/8" to 1" eye 3/4" length 2 15/16" McMaster hairpin cotter, zinc-plated spring steel 11/64" wire 5/8" to 1" eye 7/8" length 3 1/4" McMaster hairpin cotter, zinc-plated spring steel 11/64" wire 3/4" to 1 1/16" eye 7/8" length 3 1/2" McMaster hairpin cotter, zinc-plated spring steel 1/8" wire 3/4" to 1 1/8" eye 1" length 3 1/8" McMaster hairpin cotter, zinc-plated spring steel 9/64" wire 3/4" to 1 1/8" eye 3/4" length 3 5/16" McMaster hairpin cotter, zinc-plated spring steel 11/64" wire 7/8" to 1" eye 1" length 3 3/4" McMaster hairpin cotter, zinc-plated spring steel 5/16" wire 7/8" to 1" eye 7/8" length 4 1/16" McMaster hairpin cotter, zinc-plated spring steel 5/32" wire 7/8" to 1 1/16" eye 7/8" length 2 3/16" McMaster hairpin cotter, zinc-plated spring steel 11/64" wire 7/8" to 1 1/4" eye 7/8" length 3 3/4" McMaster hairpin cotter, zinc-plated spring steel 15/64" wire 1 1/8" to 1 1/2" eye 1 1/8" length 5" McMaster hairpin cotter, zinc-plated spring steel 1/4" wire 1 1/8" to 1 1/2" eye 7/8" length 4" McMaster hairpin cotter, zinc-plated spring steel 2 mm wire 6 mm to 11 mm eye 10 mm length 50 mm McMaster hairpin cotter, zinc-plated spring steel 2 mm wire 9 mm to 14 mm eye 10 mm length 57 mm McMaster hairpin cotter, zinc-plated spring steel 2.5 mm wire 9 mm to 14 mm eye 10 mm length 50 mm McMaster hairpin cotter, zinc-plated spring steel 3 mm wire 10 mm to 16 mm eye 18 mm length 72 mm McMaster hairpin cotter, zinc-plated spring steel 3.5 mm wire 10 mm to 16 mm eye 18 mm length 70 mm McMaster hairpin cotter, zinc-plated spring steel 4 mm wire 16 mm to 20 mm eye 20 mm length 74 mm McMaster hairpin cotter, zinc-plated spring steel 4 mm wire 16 mm to 20 mm eye 21 mm length 85 mm McMaster hairpin cotter, zinc-plated spring steel 4.5 mm wire 16 mm to 26 mm eye 21 mm length 82 mm McMaster hairpin cotter, zinc-plated spring steel 5 mm wire 20 mm to 28 mm eye 24 mm length 85 mm McMaster hairpin cotter, zinc-plated spring steel 5 mm wire 20 mm to 28 mm eye 24 mm length 102 mm McMaster hairpin cotter, zinc-plated spring steel 6 mm wire 28 mm to 40 mm eye 24 mm length 105 mm McMaster hairpin cotter, zinc-plated spring steel 6 mm wire 28 mm to 40 mm eye 30 mm length 126 mm McMaster hairpin cotter, zinc-plated spring steel 7 mm wire 28 mm to 45 mm eye 30 mm length 105 mm McMaster hairpin cotter, zinc-plated spring steel 7 mm wire 28 mm to 45 mm eye 30 mm length 127 mm McMaster hairpin cotter, zinc-plated spring steel 8 mm wire 30 mm to 45 mm eye 28 mm length 110 mm McMaster hairpin cotter, zinc-plated spring steel 8 mm wire 30 mm to 45 mm eye 28 mm length 132 mm McMaster hairpin clip (zinc-plated spring steel; 18-8 stainless same sizes) 1/32" wire shaft 1/8" pin opening 5/64" length 3/8" McMaster hairpin clip (zinc-plated spring steel; 18-8 stainless same sizes) 1/32" wire shaft 3/16" pin opening 9/64" length 1/2" McMaster hairpin clip (zinc-plated spring steel; 18-8 stainless same sizes) 1/32" wire shaft 1/4" pin opening 7/32" length 5/8" McMaster hairpin clip (zinc-plated spring steel; 18-8 stainless same sizes) 3/64" wire shaft 5/16" pin opening 1/4" length 3/4" McMaster hairpin clip (zinc-plated spring steel; 18-8 stainless same sizes) 3/64" wire shaft 3/8" pin opening 5/16" length 1" McMaster hairpin clip (zinc-plated spring steel; 18-8 stainless same sizes) 1/16" wire shaft 7/16" pin opening 3/8" length 1 1/8" McMaster hairpin clip (zinc-plated spring steel; 18-8 stainless same sizes) 1/16" wire shaft 1/2" pin opening 7/16" length 1 1/8" McMaster hairpin clip (zinc-plated spring steel; 18-8 stainless same sizes) 3/32" wire shaft 5/8" pin opening 17/32" length 1 1/2" McMaster hairpin clip (zinc-plated spring steel; 18-8 stainless same sizes) 3/32" wire shaft 3/4" pin opening 21/32" length 1 7/8" McMaster hairpin clip (zinc-plated spring steel; 18-8 stainless same sizes) 7/64" wire shaft 7/8" pin opening 25/32" length 2 1/8" McMaster hairpin clip (zinc-plated spring steel; 18-8 stainless same sizes) 1/8" wire shaft 1" pin opening 7/8" length 2 3/8" Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Aspen Fasteners: Metric DIN 11024 spec: d1, d2, d3, d4, l for the 2.5 to 8 mm spring cotters (the page does not define the letters) — web — Maker data sheet; numbers only — https://www.aspenfasteners.com/v/vspfiles/files/docs/Metric_DIN_11024_spec.pdf - fasten.it: DIN 11024 cotter pins, Beta type (spring cotters), 01/1973: d1, d2, d3, d4, l1, l2, l3, h, r1, r2, weight; a second 'commonly used' single-coil table — web — Reference page; numbers only — https://fasten.it/norms/norm/din_11024 - McMaster-Carr: R-clips and hairpin cotter pins / hairpin clips (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/r-clips No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned. API: https://xemstudio.com/api/geometry?object=r-clips-hairpin-cotters-din-11024