Heyco strain relief bushings (SR series): mounting hole, to-prevent-rotation dimension, panel thickness, body length and cable range — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/heyco-strain-relief-bushings/ (sheet CC BY 4.0) Basis: Heyco's flat-cable strain relief page (read in full), Heyco's round-cable sheet as hosted by Mouser (cross-checked against two distributor copies), and the sheet for the SR 5P3-4; numbers only Catalog version: 2026-10-20 Sizes: see table below - Columns follow Heyco's sheets: A is the mounting hole diameter, B the 'to prevent rotation' dimension, 'finished fit panel thickness' (the thickest panel the groove is made for; the sheets say the part has additional clearance and custom thicknesses are available), C the body length, and the hole plug part number. Dimensions are inches with mm in brackets as printed. Material is nylon 6/6, rated −18 to 105 °C, standard colour black, per the flat-cable page. - What B means: the sheets give the hole diameter and the 'to prevent rotation' figure but do not describe the hole as round or D-cut in the text read. For the SR 30-1 the sheet says to use an elongated mounting hole (the printed B of .730 in exceeds the .560 in A, as for the SR 33-1's .875 in vs .750 in), so B is shown as printed and not interpreted. No panel-hole shape is drawn. - Cable range: the layout of the round-cable sheets is flattened in the copies read, so cable OD columns are partly unreadable (upper limits of SR 2M-1 and SR 5MN-3, the lower limit of others). Only cable entries on which the copies agree are shown; use Heyco's page for the full table. Rows left out: SR 5L-1 (1154), SR 30-1A / 30-1B (1487 / 1490), thin-panel parts (SR 4A-6, SR 3A-4 and the other .040 in panel sizes) and the many part numbers with no readable dimensions. For the SR 6P4-4 (1163) the sheet prints a panel thickness of .125 in but 2.5 mm; the inch value is shown and the sheet's own mismatch noted. - Rubber grommets from the same maker are on rubber-grommets-panel-hole, and cable glands on cable-glands-pg-thread and cable-glands-metric-thread. No file: the bushing's outline is not published as numbers in a source read. Heyco publishes CAD for its parts on its site; linked, not copied. Heyco body no. type mounting hole A in (mm) to prevent rotation B in (mm) panel thickness in (mm) body length C in (mm) hole plug cable as printed 1060 SR 2M-1 .375 (9.5) .330 (8.4) .062 (1.6) .406 (10.3) 2617 AWM 12/1; the upper limit of the cable OD is unreadable in the copies 1157 SR 5MN-3 .500 (12.7) .450 (11.4) .062 (1.6) .438 (11.1) 2491 SV & SVT 18/2: from .220 (5.6) up (upper limit unreadable in one copy; .245 / 6.2 in the other) 1140 SR 5M-3 .500 (12.7) .450 (11.4) .100 (2.5) .438 (11.1) 2491 as SR 5MN-3, different panel thickness 1150 SR 5N-4 .500 (12.7) .450 (11.4) .062 (1.6) .438 (11.1) 2491 HPD 18/2: .270 (6.9) 1147 SR 5P-4 .500 (12.7) .450 (11.4) .100 (2.5) .438 (11.1) 2491 as SR 5N-4, different panel thickness 1137 SR 5P3-4 .500 (12.7) .450 (11.4) .100 (2.5) .438 (11.1) 2491 SV & SVT 18/3: .255 – .270 (6.5 – 6.9) per the sheet for 1137 (that sheet's layout is garbled; confirm with Heyco) 1184 SR 6W-1 .500 (12.7) .465 (11.8) .090 (2.3) .438 (11.1) 2491 SJ, SJT, SJO 18/2 and SPT-3 16/2: .300 (7.6) 1170 SR 5KN-4 .562 (14.3) .530 (13.5) .062 (1.6) .609 (15.5) 2494 flat: SPT-3 18/2 .19 × .35 (4.8 × 8.9); SPT-3 16/2 .20 × .37 (5.1 × 9.4); SPT-2 18/3 .15 × .40; 16/3 .16 × .41 1174 SR 5W-1 .562 (14.3) .530 (13.5) .125 (3.2) .609 (15.5) 2494 flat: SPT-2 18/3 .15 × .40 (3.8 × 10.2); 16/3 .16 × .41 (4.1 × 10.4); HPN 16/2 .16 × .37 (4.1 × 9.4) 1167 SR 5K-4 .562 (14.3) .530 (13.5) .125 (3.2) .609 (15.5) 2494 flat: same cables as 1170 1160 SR 6N4-4 .625 (15.9) .550 (14.0) .062 (1.6) .578 (14.7) 2497 flat: SPT-2 18/3 and 16/3 1163 SR 6P4-4 .625 (15.9) .550 (14.0) .125 (3.2 (printed 2.5 mm: sheet disagrees with itself)) .578 (14.7) 2497 flat: same cables as 1160 1504 SR 33-1 .750 (19.0) .875 (22.2) .125 (3.2) .781 (19.8) consult Heyco flat: SPT-3 16/2 to 14/3 (.20 × .37 to .24 × .51) 1517 SR 34-2 .875 (22.2) .840 (21.3) .125 (3.2) .813 (20.7) 2509 flat: SPT-3 14/2 to 12/3 (.24 × .42 to .29 × .65) 1497 SR 31-2 .875 (22.2) .835 (21.2) .125 (3.2) .812 (20.6) 2509 flat: SPT-3 12/3 (.32 × .65) and 10/3 1484 SR 30-1 .560 (14.2) .730 (18.5) .125 (3.2) .672 (17.1) consult Heyco flat: SPT-3 18/2 .19 × .35 to 16/3 .20 × .43; sheet says use the elongated mounting hole Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Heyco: Original strain relief bushings, straight-thru for flat cables, .560 / 14.2 mm to .875 / 22.2 mm mounting holes (maker's page; the maker also provides CAD) — web — Maker page; numbers only — https://www.heyco.com/products/strain-relief-bushings/original-strain-reliefs/heyco-original-strain-relief-bushings-straight-thru-for-flat-cables-560-142-mm-to-875-222-mm-mounting-holes - Heyco (datasheet hosted by Mouser): Original strain relief bushings, round cable, .375 to .500 in mounting holes — web — Maker datasheet; numbers only — https://www.mouser.com/datasheet/2/184/Original_Strain_Relief_Round_1-1133253.pdf - IEWC (distributor copy of the Heyco sheet for 1137): Heyco SR 5P3-4 (1137) spec sheet — web — Distributor copy of the maker sheet; numbers only — https://media.iewc.com/SpecificationSheets/1137.pdf - H. Weckhardt (copy of the Heyco round-cable sheet): Heyco Original strain relief bushings round cable (cross-check) — web — Distributor copy of the maker sheet; numbers only — https://www.hweckhardt.com/images/pdf/data/Heyco Original Strain Relief Bushings Round Cable.pdf 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=heyco-strain-relief-bushings