Sizing
SAE J1926 ORB Boss O-Rings: AS568 900-Series Sizes That Actually Seal the Port
What SAE J1926 O-Ring Boss fittings need from the seal: AS568-901…932 boss O-Rings, how they differ from NPT and JIC, materials, install tips, and a Boss-only size chart.
The Master O-Ring Size Chart: What It Shows, Why It Helps, and Who It Is For
A practical guide to the handbook Master O-Ring Size Chart: multi-standard sizing, nearest-match search, tolerances, back-up rings, and who gets the most from it.
How to Measure an O-Ring
Two dimensions, one common mistake, and when to measure the groove instead.
AS568 O-Ring Size Chart (Dash Numbers)
AS568 O-Ring size chart with dash numbers, ID, CS, and OD in inches and millimeters for the 0xx through 4xx series, plus the history of the AS568 standard.
Backup Ring Size Chart (AS568)
AS568 back-up ring size chart with dash numbers, ID, width, height, and contour dimensions for high-pressure extrusion protection, plus how back-up rings fit the AS568 system.
BS 1806 O-Ring Size Chart
BS 1806 British imperial O-Ring size chart with dash numbers aligned to AS568-style series, plus background on BS 1806.
BS 4518 O-Ring Size Chart
BS 4518 British metric O-Ring size chart with ID, CS, and OD in millimeters and inches, plus background on the BS 4518 standard.
O-Ring Cord Tolerances (RMA / ARPM E1, E2, E3)
Cross-sectional tolerance for extruded O-Ring cord: the RMA/ARPM Table 13 and ISO 3302-1 classes E1, E2 and E3 in inch and millimeter, how cord compares to a molded O-Ring, how material and durometer change what a mill can hold, plus sponge and cut length tables.
DIN 3771 O-Ring Size Chart
DIN 3771 German / EU metric O-Ring size chart with ID, CS, and OD in millimeters and inches, plus the history of DIN 3771.
Generic Metric O-Ring Size Chart
Generic metric O-Ring size chart of common tooling ID × CS sizes in millimeters, with OD and inch equivalents.
O-Ring Groove & Gland Dimension Charts
The complete O-Ring groove reference: interactive gland dimension charts for radial, face, dovetail, hydraulic, pneumatic, and floating styles, plus squeeze, fill, extrusion, finish, and install chamfer guides.
How to Measure an O-Ring
How to measure O-Ring ID and cross-section with calipers, pi-tape, size cones, slide gauges, and lab vision systems, and why we recommend Olypsys® first.
ISO 6149 O-Ring Size Chart (Metric Ports)
ISO 6149 metric port / fitting O-Ring size chart: port thread, CS×ID code, and ID/CS/OD in millimeters and inches.
JIS B 2401 O-Ring Size Chart (S / P / G / V)
JIS B 2401 Japanese O-Ring size chart: S, P, G, and V series with ID, CS, and OD in millimeters and inches, plus the history of the JIS B 2401 standard.
Master O-Ring Size Chart
Filterable multi-standard O-Ring size chart, search by ID or cross-section across AS568, ISO, JIS, BS, DIN and more.
Metric O-Ring Size Chart (ISO 3601)
Metric O-Ring size chart for ISO 3601: ID × CS in millimeters, store CS×ID codes, and OD, plus the history of the ISO 3601 standard.
NF T 47-501 O-Ring Size Chart
NF T 47-501 French metric O-Ring size chart with ID, CS, and OD in millimeters and inches.
ORB Boss O-Ring Size Chart (AS568 900-Series)
AS568 900-series ORB boss O-Ring size chart for SAE J1926 ports: dash, tube OD, thread, ID, CS, and OD, plus how boss seals fit the AS568 and J1926 story.
Parker 500 Series O-Ring Size Chart
Parker 500 series O-Ring size chart (5-xxx codes) with ID, CS, and OD in inches and millimeters.
O-Ring Size Charts & Standards (AS568 & Metric)
AS568 and metric O-Ring size charts, dash numbers, groove design, and how to measure an existing seal.
SMS 1586 O-Ring Size Chart
SMS 1586 Swedish / Nordic metric O-Ring size chart with ID, CS, and OD in millimeters and inches.
Square Ring Size Chart (AS568 Dash)
Square ring size chart using AS568 dash numbers with ID, square-wall CS, and OD in inches and millimeters.
X-Ring Size Chart (AS568 Dash)
X-Ring (Quad-Ring) size chart using AS568 dash numbers with ID, CS, and OD in inches and millimeters.
