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Unthreaded round spacers by ID and OD: M2–M5 brass and aluminium sleeve spacers (Essentra, JC Fasteners, Keystone) + 10 tube models

Name: Unthreaded round spacers by ID and OD: M2–M5 brass and aluminium sleeve spacers (Essentra, JC Fasteners, Keystone) + 10 tube models dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

What ID, OD and lengths do unthreaded round spacers come in for M3 and M4 screws? · Standard part · basis: Essentra's brass round unthreaded spacer listing (three pages read), JC Fasteners' aluminium E5C18 data sheet (M2 to M5), Keystone Electronics' round clear-hole spacer datasheets; ten tube envelopes as files

Also called: m3 round spacer id od, m4 spacer 4.3 id 8 od, unthreaded spacer 3.2 id, m5 round spacer 5.3 id, m2 spacer 2.2 id 5 od, aluminium spacer m3 3.2 5 mm od, brass spacer 6 mm od 3.2 id, #4 round spacer 0.250 od, round spacer sizes chart, unthreaded standoff m3, spacer sleeve 10 mm od 5.3, round spacer 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: 10.0 mm
width: 10.0 mm
height: 10.0 mm

Notes

Millimetres unless marked. Round unthreaded spacers (sleeve spacers) by inside diameter, outside diameter and length. Essentra's brass spacers: ID / OD pairs 2.2 / 4.0, 2.5 / 5.0, 3.2 / 6.0, 4.3 / 8.0, 5.3 / 10.0; the lengths shown are those seen on three of the five listing pages (54 results in all), so they are examples, not the full range. JC Fasteners' E5C18 aluminium spacers: M2 2.2 / 5.0, M2.5 2.7 / 5.0, M3 3.2 / 5.0, M4 4.3 / 6.0, M5 5.3 / 7.0, with lengths 3 (or 4, 5) to 50 mm as listed; the sheet states no tolerances and says its data is informative.
The IDs are clearance sizes for the screw (2.2 for M2, 3.2 for M3, 4.3 for M4, 5.3 for M5, as the makers list them); the two makers differ in OD for the same bore (3.2 ID: OD 6.0 Essentra, OD 5.0 JC) and in the M2.5 ID (2.5 Essentra, 2.7 JC), so choose by the OD you need. Keystone's round clear-hole spacers (inch) have OD 0.250 or 0.312 in and lengths 0.125 to 2 in for #4, #6, #8 and #10 screws in aluminium, brass, nylon 6/6 or phenolic; part 3458 is 0.250 in OD × 0.375 in long (Newark lists a 3.048 mm bore for it; the Keystone page does not give the ID).
Files: ten plain tubes at the published ID and OD, drawn at an example length of 10 mm (Xem's choice; every size is available in more than one length). Chamfers, if any, are not published. Threaded standoffs: threaded-standoffs-metric and threaded-standoffs-hex-m4-m6-and-inch. Shaft spacers (Ø3 / Ø5 / Ø8): shaft-collars-clips-and-shafts. Essentra offers CAD per part on its site; McMaster-Carr sells unthreaded spacers (made to order and stock); both linked, not copied.

Unthreaded round spacers by ID and OD: M2–M5 brass and aluminium… size chart

maker / material	ID (mm)	OD (mm)	lengths (mm)	screw
Essentra, brass	2.2	4.0	10 (seen on three of the listing pages)	M2 – M5 screw clearance by ID
Essentra, brass	2.5	5.0	1, 2, 3, 5, 6, 7, 8, 20 (seen on three of the listing pages)	M2 – M5 screw clearance by ID
Essentra, brass	3.2	6.0	1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 25, 30 (seen on three of the listing pages)	M2 – M5 screw clearance by ID
Essentra, brass	4.3	8.0	3, 5, 7, 8, 10, 12, 15, 25, 30, 35, 40 (seen on three of the listing pages)	M2 – M5 screw clearance by ID
Essentra, brass	5.3	10.0	2, 3, 4, 5, 6, 7, 8, 10, 15, 18, 30 (seen on three of the listing pages)	M2 – M5 screw clearance by ID
JC Fasteners E5C18, aluminium 6061 (M2)	2.2	5.0	3, 4, 5, 6, 8, 10, 12, 15, 20, 25	M2 screw
JC Fasteners E5C18, aluminium 6061 (M2.5)	2.7	5.0	3, 4, 5, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40	M2.5 screw
JC Fasteners E5C18, aluminium 6061 (M3)	3.2	5.0	3, 4, 5, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50	M3 screw
JC Fasteners E5C18, aluminium 6061 (M4)	4.3	6.0	4, 5, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50	M4 screw
JC Fasteners E5C18, aluminium 6061 (M5)	5.3	7.0	5, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50	M5 screw
Keystone 3458, aluminium, clear Iridite	3.048 mm bore (Newark; not on the Keystone page)	0.250 in (6.35 mm)	0.375 in (9.525 mm)	#4 / M3
Keystone 4264, aluminium	not listed on the pages read	not listed on the pages read	0.625 in (15.88 mm)	#10
Keystone round clear-hole spacer family	—	0.250 or 0.312 in	0.125 to 2 in	#4, #6, #8, #10 clearance; aluminium, brass, nylon 6/6, phenolic; threaded or unthreaded

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.

feature	exact	mates with	fit	files
bore	Ø2.2 / 2.5 / 3.2 / 4.3 / 5.3 mm (Essentra) and 2.2 / 2.7 / 3.2 / 4.3 / 5.3 mm (JC Fasteners) for M2 to M5	screw or bolt of the matching size passing through the spacer (these are clearance holes sized to the screw)	slide	round-spacer-*
outside	Ø4 to 10 mm (Essentra), Ø5 to 7 mm (JC)	housing bore or counterbore around the spacer, if recessed	slide	round-spacer-*
length	example 10 mm (Xem's choice); real lengths 1 to 40 mm (Essentra seen) and 3 to 50 mm (JC)	gap between the two parts it holds apart	designed	round-spacer-*

Where the files are

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

Essentra Components	Round unthreaded metal spacers (brass): inside diameter, outside diameter, length per part (54 results; three listing pages read)	web, CAD per part	Maker / distributor page; dimensions are facts verify
JC Fasteners (data sheet)	Round spacer E5C18, aluminium 6061: M2 to M5 inner / outer diameter and lengths 3 to 50 mm	web	Maker data sheet; numbers only
Keystone Electronics (datasheet via GlobalSpec) and Mouser	Round clear-hole spacers: OD 0.250 / 0.312 in, length 0.125 to 2 in, #4 / #6 / #8 / #10 clearance; part 3458 (aluminium, 0.250 OD, 0.375 long, #4 / M3) and 4264 (#10, 0.625 long)	web	Maker datasheet; numbers only
McMaster-Carr	Unthreaded spacers (made to order and stock) (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

Free files

★ Free files 10 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

round-spacer-id2p2-od4-x10-essentra	unthreaded round spacer tube: ID Ø2.2, OD Ø4 mm (Essentra brass size), example length 10 mm (Xem's choice); plain tube, no chamfer	STEP · STL
round-spacer-id2p5-od5-x10-essentra	unthreaded round spacer tube: ID Ø2.5, OD Ø5 mm (Essentra brass size), example length 10 mm (Xem's choice); plain tube, no chamfer	STEP · STL
round-spacer-id3p2-od6-x10-essentra	unthreaded round spacer tube: ID Ø3.2, OD Ø6 mm (Essentra brass size), example length 10 mm (Xem's choice); plain tube, no chamfer	STEP · STL
round-spacer-id4p3-od8-x10-essentra	unthreaded round spacer tube: ID Ø4.3, OD Ø8 mm (Essentra brass size), example length 10 mm (Xem's choice); plain tube, no chamfer	STEP · STL
round-spacer-id5p3-od10-x10-essentra	unthreaded round spacer tube: ID Ø5.3, OD Ø10 mm (Essentra brass size), example length 10 mm (Xem's choice); plain tube, no chamfer	STEP · STL
round-spacer-id2p2-od5-x10-jc	unthreaded round spacer tube: ID Ø2.2, OD Ø5 mm (JC Fasteners aluminium size), example length 10 mm (Xem's choice); plain tube, no chamfer	STEP · STL
round-spacer-id2p7-od5-x10-jc	unthreaded round spacer tube: ID Ø2.7, OD Ø5 mm (JC Fasteners aluminium size), example length 10 mm (Xem's choice); plain tube, no chamfer	STEP · STL
round-spacer-id3p2-od5-x10-jc	unthreaded round spacer tube: ID Ø3.2, OD Ø5 mm (JC Fasteners aluminium size), example length 10 mm (Xem's choice); plain tube, no chamfer	STEP · STL
round-spacer-id4p3-od6-x10-jc	unthreaded round spacer tube: ID Ø4.3, OD Ø6 mm (JC Fasteners aluminium size), example length 10 mm (Xem's choice); plain tube, no chamfer	STEP · STL
round-spacer-id5p3-od7-x10-jc	unthreaded round spacer tube: ID Ø5.3, OD Ø7 mm (JC Fasteners aluminium size), example length 10 mm (Xem's choice); plain tube, no chamfer	STEP · STL

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Plain text: sheet.txt · JSON: /api/geometry?object=round-spacers-unthreaded-id-od