Design Table 4-2 — Industrial Static Seal Gland Dimensions

This table reproduces Design Table 4-2 from the Parker O-Ring Handbook (“ORD 5700”), covering gland dimensions for industrial O-ring static seals rated to 103.5 bar (1500 psi). Four cross-section series are included: 2XX (0.103″ cs), 3XX (0.139″ cs), 4XX (0.210″ cs), and 5XX (0.275″ cs).

Use the search box to filter by dash number or by O-ring inner diameter. All dimensions are in inches. Tolerances shown in the column header apply uniformly to each column within its cross-section series.

Gland Dimension Lookup (Table 4-2)
Gland Cross-Section — Selected Ring
Click any row below to load its dimensions; the diagram defaults to the first row shown.
Selected ring:— — — — — — — — — — — — — — — —
All dimensions in inches. The tolerance row directly below the headers applies across every cross-section series, except ‡ A-1 and B-1 groove diameters are +.004/−.000 for the 4XX and 5XX series (.210″ and .275″ cross-sections). Mean OD is reference only.
Parker No. O-Ring Dimensions Male Gland Female Gland Male Gland Female Gland G† Groove Width (in)
ID (in) ± ID Tol Mean OD Ref (in) A Bore Dia (in) B-1 Groove Dia (in) A-1 Groove Dia (in) B Tube OD (in) C Plug Dia (in) D Throat Dia (in)
Tolerance — — ref +.002/−.000 +.002/−.000‡ +.002/−.000‡ +.000/−.002 +.000/−.001 +.001/−.000 +.005/−.000
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* These designs require considerable installation stretch. If assembly breakage is incurred, use a compound having higher elongation or use a two-piece piston.    † This groove width does not permit the use of Parbak® rings. For pressures above 103.5 bar (1500 psi), consult Design Chart 4-2 for groove widths where back-up rings must be used.

Design Chart 4-2 — Industrial O-Ring Static Seal Glands
O-Ring 2-Size
AS568B-		 W Cross-Section L Gland
Depth		 Squeeze E(a) Diametral
Clearance		 G – Groove Width R Groove
Radius		 Max.
Eccentricity (b)
Nominal Actual Actual % No Parbak
Ring (G)		 One Parbak
Ring (G₁)		 Two Parbak
Rings (G₂)
004
through
050		1/16.070 ±.003
(1.78 mm)		.050
to
.052		.015
to
.023		22
to
32		.002
to
.005		.093
to
.098		.138
to
.143		.205
to
.210		.005
to
.015		.002
102
through
178		3/32.103 ±.003
(2.62 mm)		.081
to
.083		.017
to
.025		17
to
24		.002
to
.005		.140
to
.145		.171
to
.176		.238
to
.243		.005
to
.015		.002
201
through
284		1/8.139 ±.004
(3.53 mm)		.111
to
.113		.022
to
.032		16
to
23		.003
to
.006		.187
to
.192		.208
to
.213		.275
to
.280		.010
to
.025		.003
309
through
395		3/16.210 ±.005
(5.33 mm)		.170
to
.173		.032
to
.045		15
to
21		.003
to
.006		.281
to
.286		.311
to
.316		.410
to
.415		.020
to
.035		.004
425
through
475		1/4.275 ±.006
(6.99 mm)		.226
to
.229		.040
to
.055		15
to
20		.004
to
.007		.375
to
.380		.408
to
.413		.538
to
.543		.020
to
.035		.005

(a) Clearance (extrusion gap) must be held to a minimum consistent with design requirements for temperature range variation.

(b) Total indicator reading between groove and adjacent bearing surface.

(c) Reduce maximum diametral clearance 50% when using silicone or fluorosilicone O-rings.

(d) For ease of assembly, when Parbaks are used, gland depth may be increased up to 5%.

Column Definitions
Gland Dimension Columns — Design Table 4-2
Column Symbol Description Tolerance
Parker No.—Parker dash number with series prefix (e.g., 3-214). Unique identifier for each O-ring size and cross-section.—
IDIDO-ring inner diameter, free state.± per “ID Tol” column
± ID TolWTolerance on inner diameter. Called out as “±W” in the handbook header.—
Mean OD Ref—Reference outer diameter = ID + 2 × cross-section nominal. Used to verify squeeze; not a controlled dimension.Reference only
AABore Diameter — Male Gland. The cylinder bore that the O-ring seals against in a piston (male) gland application.+.002 / −.000
A-1A‑1Groove Diameter — Female Gland. The groove OD in a face seal (female) gland.−.000 / +
BBTube OD — Female Gland. The shaft or tube outer diameter in a female (face seal) gland.+.000 / −.002
B-1B‑1Groove Diameter — Male Gland. The groove bottom diameter in a piston (male) gland.+.000 / −
CCPlug Diameter — Male Gland. The male plug OD in a straight-thread port seal application.+.000 / .001
DDThroat Diameter — Female Gland. The throat (entry bore) of a female face seal gland.+.001 / −.000
G†GGroove Width. Common to all rings in the same cross-section series. Parbak® rings not permitted at this width — use Design Chart 4-2 above 1500 psi.+.005 / −.000

Cross-section series: The first digit of the dash number encodes the nominal O-ring cross-section diameter (cs):

  • 2XX — 0.103″ cs, G† = 0.140″
  • 3XX — 0.139″ cs, G† = 0.187″
  • 4XX — 0.210″ cs, G† = 0.281″
  • 5XX — 0.275″ cs, G† = 0.375″

Remaining digits encode the O-ring inner diameter in a systematic sequence. The full dash number (e.g., 3-214) is the standard way to specify a Parker O-ring for procurement.

Source & Important Notices
  • Source: Parker O-Ring & Engineered Seals Division, Parker O-Ring Handbook (ORD 5700), Design Table 4-2: Gland Dimensions for Industrial O-Ring Static Seals, 103.5 Bar (1500 psi) Max. Parker Hannifin Corporation, 2360 Palumbo Drive, Lexington, KY 40509.
  • No Parker affiliation or endorsement. Parker Hannifin Corporation has not participated in the development of this lookup tool and does not approve or endorse it. Verify all dimensions against the current edition of the Parker O-Ring Handbook before use in design.
  • 1500 psi maximum. The groove widths in Design Table 4-2 do not accommodate Parbak® back-up rings. For applications above 103.5 bar (1500 psi), consult Design Chart 4-2 in the handbook for groove widths where back-up rings must be used.
  • Verify critical dimensions. Always confirm gland dimensions against the current Parker O-Ring Handbook for safety-critical or pressure-containing applications. This tool is a reference aid, not a substitute for engineering judgment.

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