O-ring groove dimensions, static radial gland (piston and rod), AS568 cross-sections — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/oring-gland-static-radial-as568/  (sheet CC BY 4.0)
Basis: Parker O-Ring Handbook ORD 5700, Design Chart 4-1 (Industrial Static Seal Glands), AS568 cross-sections .070 to .275 in
Catalog version: 2026-10-20

Sizes: see table below
- Depth L is the radial gland depth: the distance from the bore (piston seal) or the rod surface (rod seal) to the groove bottom. Piston gland: groove root Ø = bore Ø - 2L. Rod gland: groove root Ø = rod Ø + 2L. Widths G, G1, G2 are for no, one and two back-up rings.
- Squeeze, depth and clearance are tabulated as ranges because the O-ring, groove and bore each carry a tolerance. All figures are inches as printed; the sample files use the middle of each range, stated in the file notes.
- Static means no relative motion once assembled (a plug, a cap on a tube, a sleeve). The squeeze is higher than for a moving seal because nothing slides on the ring. For a moving rod or piston see the reciprocating gland page.
- Typical use: a 2-214 on a cap is -2xx, so cross-section .139 in: depth .111 to .113 in, groove .187 to .192 in wide with no back-up ring, bottom radius .010 to .025 in, up to .003 to .006 in diametral clearance.
- Files: for each of the five cross-sections a piston-style sample ring (grooves in the outside) and a rod-style sample block (grooves in the bore), each carrying the three widths (no / 1 / 2 back-up) side by side, in true section at a sample diameter of 2.000 in. Groove-bottom corners are rounded at the middle of the printed radius range; the groove mouth is broken at the printed 0.005 in radius. Walls are square (the drawing's 0 to 5 degree draft is not modelled).
- Back-up rings themselves are not modelled, and nothing here is a tolerance or fit statement for your own machining or print process: add your process allowance.

AS568 series (dash sizes)  cross-section W, in  gland depth L, in  squeeze, in  squeeze, %  diametral clearance, in  groove width G, no back-up, in  G1, 1 back-up, in  G2, 2 back-ups, in  groove radius R, in  max eccentricity, in
-0xx (004 to 050)  0.070 ± 0.003  0.050 to 0.052  0.015 to 0.023  22 to 32  0.002 to 0.005  0.093 to 0.098  0.138 to 0.143  0.205 to 0.210  0.005 to 0.015  0.002
-1xx (102 to 178)  0.103 ± 0.003  0.081 to 0.083  0.017 to 0.025  17 to 24  0.002 to 0.005  0.140 to 0.145  0.171 to 0.176  0.238 to 0.243  0.005 to 0.015  0.002
-2xx (201 to 284)  0.139 ± 0.004  0.111 to 0.113  0.022 to 0.032  16 to 23  0.003 to 0.006  0.187 to 0.192  0.208 to 0.213  0.275 to 0.280  0.010 to 0.025  0.003
-3xx (309 to 395)  0.210 ± 0.005  0.170 to 0.173  0.032 to 0.045  15 to 21  0.003 to 0.006  0.281 to 0.286  0.311 to 0.316  0.410 to 0.415  0.020 to 0.035  0.004
-4xx (425 to 475)  0.275 ± 0.006  0.226 to 0.229  0.040 to 0.055  15 to 20  0.004 to 0.007  0.375 to 0.380  0.408 to 0.413  0.538 to 0.543  0.020 to 0.035  0.005

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Parker Hannifin O-Ring Division (chart as copied by All Seals Inc.): Parker O-Ring Handbook ORD 5700, Design Chart 4-1: Industrial Static Seal Glands (radial, AS568 cross-sections) — web — Publisher's page; dimensions are facts — https://allsealsinc.com/pdfs/Static-oring-glands.pdf
- Parker Hannifin O-Ring Division: Parker O-Ring Handbook ORD 5700 (full handbook, Sections IV and V: static and dynamic O-ring sealing) — web — Publisher's page; dimensions are facts — https://discover.parker.com/Parker-ORing-Handbook-ORD-5700

Free files (CC BY 4.0, Xem Studio; STEP + STL, 10 parts): https://xemstudio.com/files/hardware/oring-gland-static-radial-as568/index.json
API: https://xemstudio.com/api/geometry?object=oring-gland-static-radial-as568