Internal Retaining ( Snap ) Ring Sizes and Groove Design Bore Sizes 5.250 - 8.250

ANSI Mechanical Hardware

The following is Internal Retaining Snap Ring Sizes and Groove Design Chart for industrial applications.

Retaining Ring Groove Dimensional Requirements

Internal Retaining ( Snap ) Ring Size Designations

(All data is in inches.)

Housing Bore	Ring				Ring Groove
Dia.	Diameter		Thickness		Diameter		Width		Edge
ID	A	Tol.	T	Tol.	OD	Tol.	S	Tol.	E	Tol.
5.250 5.375 5.500 5.750 6.000 6.250 6.500 6.625 6.750 7.000 7.250 7.500 7.750 8.000 8.250	5.770 5.910 6.066 6.336 6.620 6.895 7.170 7.308 7.445 7.720 7.995 8.270 8.545 8.820 9.095	+.090 -.090	.125 .125 .125 .125 .125 .156 .156 .156 .156 .156 .187 .187 .187 .187 .187	+.004 -.004 ----   +.005 -.005	5.520 5.650 5.770 6.020 6.270 6.530 6.790 6.925 7.055 7.315 7.575 7.840 8.100 8.360 8.620	+.007 -.007 ----   +.008 -.008	.139 .139 .139 .139 .139 .174 .174 .174 .174 .174 .209 .209 .209 .209 .209	+.006 -.000   ----   +.008 -.000	.405 .405 .405 .405 .405 .420 .435 .450 .456 .471 .486 .510 .525 .540 .555	Not more Than ± 10% of E

Reference: Industrial Retaining Snap Rings, 3100 Series.

All dimensions are in inches. Depth of groove d = (OD-ID)/2. Thickness indicated is for unplated rings; for most plated rings, the maximum ring thickness will not exceed the minimum groove width (S) minus 0.0002 inch. Standard material: carbon spring steel (SAE 1060-1090).

Ring Free Diameter Tolerances: For shaft sizes 0.125 through 0.250, +0.002, −0.004; for sizes 0.276 through 0.500, +0.002, −0.005; for sizes 0.551 through 1.023, +0.005, −0.010; for sizes 1.062 through 1.500, +0.010, −0.015; for sizes 1.562 through 2.000, +0.013, −0.020; for sizes 2.062 through 2.500, +0.015, −0.025; for sizes 2.559 through 5.000, +0.020, −0.030; for sizes 5.250 through 6.000, +0.020, −0.040; for sizes 6.250 through 6.750, +0.020, −0.050; for sizes 7.000 and 7.500, +0.050, −0.130.

Ring Thickness Tolerances: For shaft sizes 0.125 and 0.156, ±0.001; for sizes 0.188 through 1.500, ±0.002; for sizes 1.562 through 5.000, ±0.003; for sizes 5.250 through 6.000, ±0.004; for sizes 6.250 through 7.500, ±0.005.

Groove Diameter Tolerances: For shaft sizes 0.125 through 0.250, ±0.0015; for sizes 0.276 through 0.562, ±0.002; for sizes 0.594 through 1.023, ±0.003; for sizes 1.062 though 1.500, ±0.004; for sizes 1.562 through 2.000, ±0.005; for sizes 2.062 through 5.000, ±0.006; for sizes 5.250 through 6.000, ±0.007; for sizes 6.250 through 7.500, ±0.008.

Groove Width Tolerances: For shaft sizes 0.125 through 0.236, +0.002, −0.000; for sizes 0.250 through 1.023, +0.003, −0.000; for sizes 1.062 through 2.000, +0.004, −0.000; for sizes 2.062 through 5.000, +0.005, −0.000; for sizes 5.250 through 6.000, +0.006, −0.000; for sizes 6.250 through 7.500, +0.008, −0.000.

Related Resources:

• Retaining Snap Ring Review and Application
• Internal Retaining Snap Ring sizes and Bore Design Sizes .250 -1.500
• Internal Retaining Snap Ring sizes and Bore Design Sizes 1.562 - 3.000
• Internal Retaining Snap Ring sizes and Bore Design 3.062 - 5.000
• Metric Tapered Retaining Snap Rings Size Chart