PEM self-clinching standoffs (SO, SOS, SOA and blind BSO): hole size, sheet thickness, edge distance, M3–M5 and #4-40 to #10-32 + hole gauges — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/pem-self-clinching-standoffs-so-bso/ (sheet CC BY 4.0) Basis: PEM's SO-series data sheet (sodata.pdf) read as text, thread by thread; two hole gauges as files Catalog version: 2026-10-20 Overall (mm): length 32.8, width 15.1, height 3.0 - Types: SO (steel, sheet hardness HRB 80 / HB 150 or less), SOS (stainless, HRB 70 / HB 125 or less), SOA (aluminium, HRB 50 / HB 82 or less, aluminium only) and SO4 (installs in stainless sheet to HRB 88 / HB 183); BSO, BSOS, BSOA and BSO4 are the blind (threaded one end, closed at the other) versions with the same dimensions (hardness limits as printed in the data sheet). Unthreaded SO standoffs, SOSG, DSO and TSO types exist and are not tabulated. - Columns as the data sheet prints them: sheet thickness (read as the minimum sheet the standoff is sized for: .040 / .050 in and 1 / 1.27 mm), minimum hole size B (+.003 / −.000 in; the data sheet lists a minimum only, no separate maximum), the bore diameter in the sheet, the dimension H, the minimum distance from hole centreline to edge D (±.010 in) and the length codes (1/32 in for inch; mm for metric). The PDF text extraction scrambled the columns, so values were assigned by matching them to the metric ones; verify the assignment against PEM's drawing before relying on it. The data sheet also lists a minimum F dimension (.156, .187, .250, .375 in; 3.2, 4, 5, 6.5, 9.5 mm) for the blind type without saying which thread each belongs to; it is not shown. - Files are two hole gauges (smallest first; 3 mm plate, 4 mm gaps and margin are Xem choices). The standoff itself is PEM's part (its CAD is on PEM's product pages, not rehosted). Plain threaded standoffs that are not clinched: threaded-standoffs-metric. type thread / code sheet thickness min hole size B bore in sheet H min dist hole C/L to edge D length codes SO / SOS / SOA / SO4 (inch) #4-40 (.112-40), codes 440 .040 .166 .165 H .187 .23 4–24 (.125–.750 in) SO / SOS / SOA / SO4 (inch) 6440 .040 .213 .212 H .250 .27 4–24 SO / SOS / SOA / SO4 (inch) #6-32 (.138-32), code 632 .040 .213 .212 H .250 .27 4–34 (.125–1.062 in) SO / SOS / SOA / SO4 (inch) 8632 .050 .281 .280 H .312 .31 4–34 SO / SOS / SOA / SO4 (inch) #8-32 (.164-32), code 832 .050 .281 .280 H .312 .31 4–34 SO / SOS / SOA / SO4 (inch) #10-32 (.190-32), code 032 .050 .281 .280 H .312 .31 4–34 SO / SOS / SOA / SO4 (metric) M3 x 0.5 1 4.22 4.2 H 4.8 6 3, 4, 6, 8, 10, 12, 14, 16, 18 SO / SOS / SOA / SO4 (metric) 3.5M3 1 5.41 5.39 H 6.4 6.8 3–18 SO / SOS / SOA / SO4 (metric) M3.5 x 0.6 1 5.41 5.39 H 6.4 6.8 3–25 SO / SOS / SOA / SO4 (metric) M4 x 0.7 1.27 7.14 7.12 H 7.9 8 3–25 SO / SOS / SOA / SO4 (metric) M5 x 0.8 1.27 7.14 7.12 H 7.9 8 3–25 BSO / BSOS / BSOA / BSO4 (inch, blind) #4-40 (.112-40), codes 440 .040 .166 .165 H .187 .23 10–34 (1/32 in codes) BSO / BSOS / BSOA / BSO4 (inch, blind) 6440 .040 .213 .212 H .250 .27 10–34 (1/32 in codes) BSO / BSOS / BSOA / BSO4 (inch, blind) #6-32 (.138-32), code 632 .040 .213 .212 H .250 .27 10–34 (1/32 in codes) BSO / BSOS / BSOA / BSO4 (inch, blind) 8632 .050 .281 .280 H .312 .31 10–34 (1/32 in codes) BSO / BSOS / BSOA / BSO4 (inch, blind) #8-32 (.164-32), code 832 .050 .281 .280 H .312 .31 10–34 (1/32 in codes) BSO / BSOS / BSOA / BSO4 (inch, blind) #10-32 (.190-32), code 032 .050 .281 .280 H .312 .31 10–34 (1/32 in codes) BSO (metric, blind) M3 x 0.5 1 4.22 4.2 H 4.8 6 6–25 BSO (metric, blind) 3.5M3 1 5.41 5.39 H 6.4 6.8 6–25 BSO (metric, blind) M3.5 x 0.6 1 5.41 5.39 H 6.4 6.8 6–25 BSO (metric, blind) M4 x 0.7 1.27 7.14 7.12 H 7.9 8 6–25 BSO (metric, blind) M5 x 0.8 1.27 7.14 7.12 H 7.9 8 6–25 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - PennEngineering (PEM): Threaded standoffs types SO, SOS, SOA, SO4 and BSO, BSOS, BSOA, BSO4 (data sheet sodata.pdf): hole size, sheet thickness, distance to edge, lengths — web — Manufacturer data sheet; dimensions are facts; CAD is PEM's, not hosted — https://www.pemnet.com/wp-content/uploads/sites/9/2022/06/sodata.pdf - McMaster-Carr: Press-fit (self-clinching) nuts (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/products/press-fit-nuts/thread-size~m6-2/ Free files (CC BY 4.0, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/pem-self-clinching-standoffs-so-bso/index.json API: https://xemstudio.com/api/geometry?object=pem-self-clinching-standoffs-so-bso