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Spring pins: slotted (ISO 8752, ASME B18.8.2) and coiled (ISO 8750): diameter, wall, chamfer, hole size, shear + hole gauges

What hole size does a slotted or coiled spring pin need, and what are its diameter, wall and chamfer? · Standard part · basis: Westfield Fasteners' ISO 8752 and ISO 8750 tables (checked against iTeh's ISO sample pages), SPIROL's inch ASME B18.8.2 slotted-pin sheet, SPIROL's 5 mm metric listing, and McMaster-Carr's spring-pin tables as cross-checks; two hole gauges as files

Also called: roll pin hole size, iso 8752 spring pin dimensions, 5 mm roll pin hole size, spring pin hole diameter, slotted spring pin size chart, 1/8 roll pin hole size, iso 8750 coiled spring pin dimensions, roll pin wall thickness, 3/16 roll pin drill size, coiled spring pin hole, roll pin chamfer, spring pin hole gauge stl

Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features

length
98.3 mm
width
20.7 mm
height
3.0 mm

Notes

  • ISO 8752 (slotted, replaces DIN 1481, 1 to 50 mm) and ISO 8750 (coiled, standard duty, 0.8 to 20 mm) are tabulated in mm. Columns: pin diameter before mounting max / min (the nominal d1 is the hole), d2 (reference only, as printed), a (chamfer length, max / min for ISO 8752), s (wall, from the table), and minimum double-shear force in kN for steel and martensitic stainless. For ISO 8750 the standard's austenitic stainless shear values are also shown. iTeh's ISO sample pages agree with Westfield on d1, d2, s and shear (and on a for ISO 8752) for the sizes read (ISO 8752: 3, 4, 5, 6, 8, 10, 12; ISO 8750: 2, 3, 4, 5, 6, 8, 10, 12, 16, 20). Westfield's 8752 table prints 22.5 kN for d1 = 18, out of line with its neighbours, so that value is left out. The reading of 'a' as a chamfer length follows ISO 8750's figure note (swaged chamfer, 'a ≈') and, for ISO 8752, matches SPIROL's printed 0.90–1.10 mm chamfer for the 5 mm pin (a 1.1 / 0.9); it was checked at that one size only.
  • Hole: both ISO standards say the hole should equal the nominal pin diameter d1 with tolerance class H12 (ISO 286-2; H10 for ISO 8750 pins of 1.2 mm and below); in the smallest permitted hole the slot should not close completely. SPIROL's 5 mm listing prints 5.00–5.12 mm. McMaster-Carr's tables print wider ranges for the ISO 8752 pins it sells (for example 5 to 5.2 mm, 8 to 8.25 mm, 10 to 10.3 mm) and, for coiled pins, 5.000–5.100 mm; use the range of the pin you buy.
  • Inch rows are SPIROL's ASME B18.8.2 slotted spring pin sheet (inches): nominal diameter, pin diameter D max / min, chamfer diameter B max, chamfer length C max / min, wall S (nominal), recommended hole max / min, and minimum double shear in lbf / kN. McMaster-Carr's inch tables agree on hole ranges and wall for the sizes checked: 1/16 in hole 0.062–0.065 in, wall 0.012 in; 1/8 in 0.125–0.129, wall 0.028; 1/4 in 0.250–0.256, wall 0.048; McMaster also prints a 1/16 in coiled pin at 0.061–0.065 in hole. Inch coiled pins (ASME B18.8.3 / B18.8.4 heavy-duty families) and ISO 13337 / DIN 7346 (light duty) were not tabulated: no source with checkable dimensions was read.
  • Not published as numbers in the sources read: the slot width of a slotted pin before or after mounting. No pin model is drawn for that reason. The files are hole gauges: plates with the published nominal holes. Metric gauge: 2, 3, 4, 5, 6, 8, 10, 12 mm (hole = nominal d1, the lower limit of H12). Inch gauge: the lower limit of SPIROL's recommended hole range. Plate thickness, spacing and corner radius are Xem's choices.
  • Clevis pins, R-clips and cotter pins are on the page pins-clevises-and-joints (it does not cover spring or roll pins); dowel pins: dowel-pins-metric. McMaster-Carr sells spring pins with per-part STEP; its slotted, coiled and metric roll-pin pages are linked, not copied.

Spring pins: slotted (ISO 8752, ASME B18.8.2) and coiled (ISO 8750)… size chart

standardnominalpin dia before mounting max / mind2 (ref.) and chamfer a, or inch B / Cwall sholemin double shear
ISO 8752 slotted1 mm1.3 / 1.2d2 0.8; a 0.35 / 0.150.2nominal d1, H120.7 kN (steel, martensitic stainless)
ISO 8752 slotted1.5 mm1.8 / 1.7d2 1.1; a 0.45 / 0.250.3nominal d1, H121.58 kN (steel, martensitic stainless)
ISO 8752 slotted2 mm2.4 / 2.3d2 1.5; a 0.55 / 0.350.4nominal d1, H122.82 kN (steel, martensitic stainless)
ISO 8752 slotted2.5 mm2.9 / 2.8d2 1.8; a 0.6 / 0.40.5nominal d1, H124.38 kN (steel, martensitic stainless)
ISO 8752 slotted3 mm3.5 / 3.3d2 2.1; a 0.7 / 0.50.6nominal d1, H126.32 kN (steel, martensitic stainless)
ISO 8752 slotted3.5 mm4.0 / 3.8d2 2.3; a 0.8 / 0.60.75nominal d1, H129.06 kN (steel, martensitic stainless)
ISO 8752 slotted4 mm4.6 / 4.4d2 2.8; a 0.85 / 0.650.8nominal d1, H1211.24 kN (steel, martensitic stainless)
ISO 8752 slotted4.5 mm5.1 / 4.9d2 2.9; a 1.0 / 0.81.0nominal d1, H1215.36 kN (steel, martensitic stainless)
ISO 8752 slotted5 mm5.6 / 5.4d2 3.4; a 1.1 / 0.91.0nominal d1, H1217.54 kN (steel, martensitic stainless)
ISO 8752 slotted6 mm6.7 / 6.4d2 4.0; a 1.4 / 1.21.2nominal d1, H1226.04 kN (steel, martensitic stainless)
ISO 8752 slotted8 mm8.8 / 8.5d2 5.5; a 2.0 / 1.61.5nominal d1, H1242.76 kN (steel, martensitic stainless)
ISO 8752 slotted10 mm10.8 / 10.5d2 6.5; a 2.4 / 2.02.0nominal d1, H1270.16 kN (steel, martensitic stainless)
ISO 8752 slotted12 mm12.8 / 12.5d2 7.5; a 2.4 / 2.02.5nominal d1, H12104.1 kN (steel, martensitic stainless)
ISO 8752 slotted13 mm13.8 / 13.5d2 8.5; a 2.4 / 2.02.5nominal d1, H12115.1 kN (steel, martensitic stainless)
ISO 8752 slotted14 mm14.8 / 14.5d2 8.5; a 2.4 / 2.03.0nominal d1, H12144.7 kN (steel, martensitic stainless)
ISO 8752 slotted16 mm16.8 / 16.5d2 10.5; a 2.4 / 2.03.0nominal d1, H12171.0 kN (steel, martensitic stainless)
ISO 8752 slotted18 mm18.9 / 18.5d2 11.5; a 2.4 / 2.03.5nominal d1, H12— (Westfield's 22.5 breaks the progression; not used) kN (steel, martensitic stainless)
ISO 8752 slotted20 mm20.9 / 20.5d2 12.5; a 3.4 / 3.04.0nominal d1, H12280.6 kN (steel, martensitic stainless)
ISO 8752 slotted21 mm21.9 / 21.5d2 13.5; a 3.4 / 3.04.0nominal d1, H12298.2 kN (steel, martensitic stainless)
ISO 8752 slotted25 mm25.9 / 25.5d2 15.5; a 3.4 / 3.05.0nominal d1, H12438.5 kN (steel, martensitic stainless)
ISO 8752 slotted28 mm28.9 / 28.5d2 17.5; a 3.4 / 3.05.5nominal d1, H12542.6 kN (steel, martensitic stainless)
ISO 8752 slotted30 mm30.9 / 30.5d2 18.5; a 3.4 / 3.06.0nominal d1, H12631.4 kN (steel, martensitic stainless)
ISO 8752 slotted32 mm32.9 / 32.5d2 20.5; a 3.6 / 3.06.0nominal d1, H12684 kN (steel, martensitic stainless)
ISO 8752 slotted35 mm35.9 / 35.5d2 21.5; a 3.6 / 3.07.0nominal d1, H12859 kN (steel, martensitic stainless)
ISO 8752 slotted38 mm38.9 / 38.5d2 23.5; a 4.6 / 4.07.5nominal d1, H121003 kN (steel, martensitic stainless)
ISO 8752 slotted40 mm40.9 / 40.5d2 25.5; a 4.6 / 4.07.5nominal d1, H121068 kN (steel, martensitic stainless)
ISO 8752 slotted45 mm45.9 / 45.5d2 28.5; a 4.6 / 4.08.5nominal d1, H121360 kN (steel, martensitic stainless)
ISO 8752 slotted50 mm50.9 / 50.5d2 31.5; a 4.6 / 4.09.5nominal d1, H121685 kN (steel, martensitic stainless)
ISO 8750 coiled0.8 mm0.91 / 0.85d2 max 0.75; a 0.30.07nominal d1, H120.4 kN steel; 0.3 kN austenitic stainless
ISO 8750 coiled1 mm1.15 / 1.05d2 max 0.95; a 0.30.08nominal d1, H120.6 kN steel; 0.45 kN austenitic stainless
ISO 8750 coiled1.2 mm1.35 / 1.25d2 max 1.15; a 0.40.10nominal d1, H120.9 kN steel; 0.65 kN austenitic stainless
ISO 8750 coiled1.5 mm1.75 / 1.62d2 max 1.40; a 0.50.13nominal d1, H121.45 kN steel; 1.05 kN austenitic stainless
ISO 8750 coiled2 mm2.25 / 2.13d2 max 1.90; a 0.70.17nominal d1, H122.5 kN steel; 1.9 kN austenitic stainless
ISO 8750 coiled2.5 mm2.78 / 2.65d2 max 2.40; a 0.70.21nominal d1, H123.9 kN steel; 2.9 kN austenitic stainless
ISO 8750 coiled3 mm3.30 / 3.15d2 max 2.90; a 0.90.25nominal d1, H125.5 kN steel; 4.2 kN austenitic stainless
ISO 8750 coiled3.5 mm3.84 / 3.67d2 max 3.40; a 10.29nominal d1, H127.5 kN steel; 5.7 kN austenitic stainless
ISO 8750 coiled4 mm4.40 / 4.20d2 max 3.90; a 1.10.33nominal d1, H129.6 kN steel; 7.6 kN austenitic stainless
ISO 8750 coiled5 mm5.50 / 5.25d2 max 4.85; a 1.30.42nominal d1, H1215 kN steel; 11.5 kN austenitic stainless
ISO 8750 coiled6 mm6.50 / 6.25d2 max 5.85; a 1.50.50nominal d1, H1222 kN steel; 16.8 kN austenitic stainless
ISO 8750 coiled8 mm8.63 / 8.30d2 max 7.80; a 20.67nominal d1, H1239 kN steel; 30 kN austenitic stainless
ISO 8750 coiled10 mm10.80 / 10.35d2 max 9.75; a 2.50.84nominal d1, H1262 kN steel; 48 kN austenitic stainless
ISO 8750 coiled12 mm12.85 / 12.40d2 max 11.70; a 31nominal d1, H1289 kN steel; 67 kN austenitic stainless
ISO 8750 coiled14 mm14.95 / 14.45d2 max 13.60; a 3.51.20nominal d1, H12120 kN steel; — kN austenitic stainless
ISO 8750 coiled16 mm17.00 / 16.45d2 max 15.60; a 41.30nominal d1, H12155 kN steel; — kN austenitic stainless
ISO 8750 coiled20 mm21.10 / 20.40d2 max 19.60; a 4.51.70nominal d1, H12250 kN steel; — kN austenitic stainless
ASME B18.8.2 slotted (inch, SPIROL)1/16 (.062) in.069 / .066B max .059; C .028 / .007.012.065 / .062 in430 / 1.91 lb / kN carbon & martensitic; 250 / 1.11 austenitic
ASME B18.8.2 slotted (inch, SPIROL)5/64 (.078) in.086 / .083B max .075; C .032 / .008.018.081 / .078 in800 / 3.56 lb / kN carbon & martensitic; 460 / 2.05 austenitic
ASME B18.8.2 slotted (inch, SPIROL)3/32 (.094) in.103 / .099B max .091; C .038 / .008.022.097 / .094 in1,150 / 5.12 lb / kN carbon & martensitic; 670 / 2.98 austenitic
ASME B18.8.2 slotted (inch, SPIROL)1/8 (.125) in.135 / .131B max .122; C .044 / .008.028.129 / .125 in1,875 / 8.34 lb / kN carbon & martensitic; 1,090 / 4.85 austenitic
ASME B18.8.2 slotted (inch, SPIROL)5/32 (.156) in.167 / .162B max .151; C .048 / .010.032.160 / .156 in2,750 / 12.23 lb / kN carbon & martensitic; 1,600 / 7.12 austenitic
ASME B18.8.2 slotted (inch, SPIROL)3/16 (.187) in.199 / .194B max .182; C .055 / .011.040.192 / .187 in4,150 / 18.46 lb / kN carbon & martensitic; 2,425 / 10.79 austenitic
ASME B18.8.2 slotted (inch, SPIROL)1/4 (.250) in.264 / .258B max .245; C .065 / .012.048.256 / .250 in7,050 / 31.36 lb / kN carbon & martensitic; 4,100 / 18.24 austenitic
ASME B18.8.2 slotted (inch, SPIROL)5/16 (.312) in.330 / .321B max .306; C .080 / .014.062.318 / .312 in10,800 / 48.04 lb / kN carbon & martensitic; 6,300 / 28.02 austenitic
ASME B18.8.2 slotted (inch, SPIROL)3/8 (.375) in.395 / .385B max .368; C .095 / .016.077.382 / .375 in16,300 / 72.51 lb / kN carbon & martensitic; 9,500 / 42.26 austenitic
ASME B18.8.2 slotted (inch, SPIROL)1/2 (.500) in.524 / .513B max .485; C .110 / .025.094.510 / .500 in27,100 / 120.55 lb / kN carbon & martensitic; 15,800 / 70.28 austenitic

Mating features

Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.

featureexactmates withfitfiles
pinISO 8752 slotted 1–50 mm; ISO 8750 coiled 0.8–20 mm; pin Ø before mounting e.g. 3 mm → 3.5 / 3.3hole = nominal d1, H12 (H10 for ISO 8750 pins of 1.2 mm and below); SPIROL 5 mm: 5.00–5.12pressspring-pin-hole-gauge*

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Westfield FastenersSlotted spring pins ISO 8752 (replaces DIN 1481): d1 max / min before mounting, d2, a, s, min double-shear force, 1 to 50 mmwebPublisher's page; dimensions are facts
iTeh StandardsISO 8752:2009 sample pages: Table 1 (d1, d2, a max / min, s, double shear), hole H12, chamferwebStandards-body sample pages; numbers only
Westfield FastenersCoiled spring pins ISO 8750 (spiral roll pins): d1 max / min before mounting, d2, a, s, min double-shear force, 0.8 to 20 mmwebPublisher's page; dimensions are facts
iTeh StandardsISO 8750:2007 sample pages: Table 1 (d1, d2, s, double shear), hole H12, swaged chamferwebStandards-body sample pages; numbers only
SPIROLSlotted spring pins, inch (ASME B18.8.2): nominal diameter, pin diameter max / min, chamfer B / C, wall S, recommended hole max / min, double shearwebMaker data sheet; numbers only
SPIROLISO 8752 slotted spring pin, 5 mm: diameter 5.40–5.60, recommended hole 5.00–5.12, chamfer 0.90–1.10, double shear 17.54 kNwebPublisher's page; dimensions are facts
McMaster-CarrSlotted spring pins (free STEP/IGES per part, for your own design use; no redistribution)STEP, IGES, PDFMcMaster-Carr site terms: personal design use, no redistribution verify
McMaster-CarrCoiled spring pins (free STEP/IGES per part, for your own design use; no redistribution)STEP, IGES, PDFMcMaster-Carr site terms: personal design use, no redistribution verify
McMaster-CarrMetric roll pins (slotted and coiled) (free STEP/IGES per part, for your own design use; no redistribution)STEP, IGES, PDFMcMaster-Carr site terms: personal design use, no redistribution verify

Free files

★ Free files 2 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

spring-pin-hole-gauge-iso-8752-8750-2-12mmhole gauge plate, 86.0 × 20.0 × 3 mm, eight holes at the nominal pin diameters 2, 3, 4, 5, 6, 8, 10, 12 mm (ISO 8752 / ISO 8750: hole = nominal d1, tolerance class H12, so the nominal is the lower limit), smallest first, 4 mm between hole edges and 4 mm of plate round the largest hole; plate thickness and spacing are Xem choicesSTEP · STL
spring-pin-hole-gauge-inch-1-16-to-1-2hole gauge plate, 98.3 × 20.7 × 3 mm, ten holes at the lower limit of SPIROL's recommended hole range for ASME B18.8.2 slotted pins (.062, .078, .094, .125, .156, .187, .250, .312, .375, .500 in; 1/16 through 1/2 in nominal), smallest first, 4 mm between hole edges and 4 mm of plate round the largest hole; plate thickness and spacing are Xem choicesSTEP · STL
Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.
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Plain text: sheet.txt · JSON: /api/geometry?object=spring-pins-iso-8752-8750-asme-b18-8-2

Spring pins: slotted (ISO 8752, ASME B18.8.2) and coiled (ISO 8750): diameter, wall, chamfer, hole size, shear + hole gauges, isometric render of a generated part
Render of spring-pin-hole-gauge-inch-1-16-to-1-2 from the free STEP; not to scale.

Fits with

Clevis pins ISO 2341 B, Ø3 to Ø8, isometric render of a generated part
Clevis pins ISO 2341 B, Ø3 to Ø87 sizes★ 7 files
Dowel pins, 2–6 mm (ISO 2338 / DIN 6325), isometric render of a generated part
Dowel pins, 2–6 mm (ISO 2338 / DIN 6325)5 sizes★ 23 files
Shoulder screws ISO 7379 (metric): shoulder Ø, thread, head size, hex key, thread length, M5 to M20, isometric render of a generated part
Shoulder screws ISO 7379 (metric): shoulder Ø, thread, head size, hex key, thread length, M5 to M207 sizes★ 7 files
Set screws (grub screws), M3–M8 (ISO 4026), isometric render of a generated part
Set screws (grub screws), M3–M8 (ISO 4026)5 sizes★ 27 files
Threaded rod, metric M3 to M12 (DIN 976), 100 to 1000 mm, isometric render of a generated part
Threaded rod, metric M3 to M12 (DIN 976), 100 to 1000 mm7 sizes★ 42 files

Questions

What hole for a 5 mm slotted spring pin?

Nominal 5 mm, class H12 (ISO 8752); SPIROL prints 5.00–5.12 mm and McMaster-Carr prints 5 to 5.2 mm. Pin diameter before mounting is 5.4–5.6 mm.

What hole for a 1/8 in roll pin?

SPIROL's ASME B18.8.2 sheet prints a recommended hole of .125 to .129 in (McMaster-Carr the same); the pin is .131 to .135 in before mounting.

What is the wall of an ISO 8752 6 mm spring pin?

s is 1.2 mm in Westfield's and iTeh's tables; pin diameter before mounting 6.4–6.7 mm.