PEM self-clinching nuts (S, CLS, CLSS): hole size, minimum edge distance, nut diameter and height, M2–M12 and #2-56 to 3/8-24 + hole gauges — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/pem-self-clinching-nuts-s-cls/ (sheet CC BY 4.0) Basis: PennEngineering (PEM) product-finder and catalog pages for the Unified and Metric S, CLS, CLSS series, read part by part; two hole gauges as files Catalog version: 2026-10-20 Overall (mm): length 98.2, width 25.0, height 3.0 - Rows are the values PEM prints on one representative part page per thread (named in the page column); hole size in sheet is +0.08 mm / +.003 −.000 in; E and T carry ±0.25 mm / ±.010 in; C max is the maximum of the clinch body (it is 0.02 mm / .001 in under the hole size on every row); the minimum distance from the hole centreline to the sheet edge is a minimum. The page for CLS-256-2 states: use a centreline-to-edge value 'greater or equal to the value specified', and recommends the maximum shank length for your sheet thickness. For use in sheet hardness: HRB 70 / HB 125 or less for CLS / CLSS (the S-type pages listed the same in the compare table). Thread specs: metric 6H ASME B1.13M, unified 2B ASME B1.1. - Minimum sheet thickness: PEM prints a 'rec. min. sheet thickness' only on the CLS-256-2 page (.056 in, for shank code 2); none of the other part pages read give one, so it is not tabulated. It depends on the shank code (A max: M2 / M2.5 / M3 codes 0, 1, 2 are .77 / .97 / 1.38 mm; #2-56 and #4-40 codes 0, 1, 2, 3 are .030 / .038 / .054 / .087 in; as printed on the catalog lists). Use PEM's data sheet for minimum thickness by shank code. - Gaps, stated plainly: the #3-48 row carries only the hole and E from the catalog list (hole .166, E .250); M12 only the catalog list's hole 17 and E 20.57 for S-M12-1ZI. The M3, M4, M6 and M8 shank code printed varies by the part read (CLS-M3-1, CLS-M4-2, CLS-M6-1, CLS-M8-1) and A is shown for that code only. M5 is from the CLSS (SS-series) page; CLS / S M5 was not read. - Files are two hole gauges (plates with the published nominal hole sizes, smallest first; 3 mm plate, 4 mm gap and 4 mm margin chosen by Xem). The nut itself is PEM's part: its CAD is on PEM's product pages and is not rehosted. PEM's thread masking and torque pages were not read. Weld nuts: weld-nuts-din-929; rivet nuts: rivet-nuts-flat-head. system thread hole in sheet E T C max min. dist. hole C/L to edge part page read A shank max by code (as printed) metric (mm) M2 x 0.4 4.22 6.35 1.5 4.2 4.8 CLS-M2-2 0 .77, 1 .97, 2 1.38 metric (mm) M2.5 x 0.45 4.22 6.35 1.5 4.2 4.8 CLS-M2.5-1 0 .77, 1 .97, 2 1.38 metric (mm) M3 x 0.5 4.22 6.35 1.5 4.2 4.8 CLS-M3-1 1 .97 (page) metric (mm) M4 x 0.7 5.41 7.87 2 5.38 6.9 CLS-M4-2 2 1.38 (page) metric (mm) M5 x 0.8 6.35 8.64 2 6.33 7.1 CLSS-M5-1 (not printed) metric (mm) M6 x 1 8.75 11.18 4.08 8.73 8.6 CLS-M6-1 1 1.38 (page) metric (mm) M8 x 1.25 10.5 12.7 5.47 10.47 9.7 CLS-M8-1 / -2 1 1.38, 2 2.21 metric (mm) M10 x 1.5 14 17.35 7.48 13.97 13.5 CLS-M10-2 1 2.21, 2 3.05 metric (mm) M12 x 1.75 17 20.57 — — — S-M12-1ZI (catalog list) 1 3.05 unified (in) #2-56 (.086) .166 .250 .070 .165 .190 CLS-256-2 0 .030, 1 .038, 2 .054 unified (in) #3-48 (.099) .166 .250 — — — list (CLS-348-n) 0 .030, 1 .038, 2 .054 unified (in) #4-40 (.112) .166 .250 .070 .165 .190 CLS-440-3 0 .030, 1 .038, 2 .054, 3 .087 unified (in) #6-32 (.138) .1875 .280 .070 .187 .220 CLS-632-0 0 .030 unified (in) #8-32 (.164) .213 .310 .090 .212 .270 CLS-832-2 2 .054 unified (in) #10-32 (.190) .250 .340 .090 .249 .280 CLSS-032-3 / -2 3 .087 unified (in) 3/8-24 (.375) .500 .560 .270 .499 .440 CLS-0624-1 1 .087 (page) Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - PennEngineering (PEM): Self-clinching nuts types S, SS, CLS, CLSS, SP: product-finder pages CLS-M2-2, CLS-M2.5-1, CLS-M3-1, CLS-M4-2, CLS-M6-1, CLS-M8-1, CLS-M10-2, CLSS-M5-1, CLS-256-2, CLS-440-3, CLS-632-0, CLS-832-2, CLSS-032-3, CLS-0624-1 — web — Manufacturer catalog; dimensions are facts; CAD is PEM's, not hosted — https://catalog.pemnet.com/viewitems/nuts-types-s-ss-cls-clss-cla-sp/self-clinching-nuts-types-s-ss-cls-clss-sp-unified?plpver=10 - 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-nuts-s-cls/index.json API: https://xemstudio.com/api/geometry?object=pem-self-clinching-nuts-s-cls