.275″ C/S

.275″ Cross Section O-Rings (Nominal Size 1/4″ Cross Section)

Actual Inches
Actual Millimeters
AS 568
Dash #
Inside
Diameter
Tol.
Cross
Section
Tol.
Inside
Diameter
Tol.
Cross
Section
Tol.
-425
4.475
.033
.275
.006
113.67
0.84
6.99
0.15
-426
4.600
.033
.275
.006
116.84
0.84
6.99
0.15
-427
4.725
.033
.275
.006
120.02
0.84
6.99
0.15
-428
4.850
.033
.275
.006
123.19
0.84
6.99
0.15
-429
4.975
.037
.275
.006
126.37
0.94
6.99
0.15
-430
5.100
.037
.275
.006
129.54
0.94
6.99
0.15
-431
5.225
.037
.275
.006
132.72
0.94
6.99
0.15
-432
5.350
.037
.275
.006
135.89
0.94
6.99
0.15
-433
5.475
.037
.275
.006
139.07
0.94
6.99
0.15
-434
5.600
.037
.275
.006
142.24
0.94
6.99
0.15
-435
5.725
.037
.275
.006
145.42
0.94
6.99
0.15
-436
5.850
.037
.275
.006
148.59
0.94
6.99
0.15
-437
5.975
.037
.275
.006
151.77
0.94
6.99
0.15
-438
6.225
.040
.275
.006
158.12
1.02
6.99
0.15
-439
6.475
.040
.275
.006
164.47
1.02
6.99
0.15
-440
6.725
.040
.275
.006
170.82
1.02
6.99
0.15
-441
6.975
.040
.275
.006
177.17
1.02
6.99
0.15
-442
7.225
.045
.275
.006
183.52
1.14
6.99
0.15
-443
7.475
.045
.275
.006
189.87
1.14
6.99
0.15
-444
7.725
.045
.275
.006
196.22
1.14
6.99
0.15
-445
7.975
.045
.275
.006
202.57
1.14
6.99
0.15
-446
8.475
.055
.275
.006
215.27
1.40
6.99
0.15
-447
8.975
.055
.275
.006
227.97
1.40
6.99
0.15
-448
9.475
.055
.275
.006
240.67
1.40
6.99
0.15
-449
9.975
.055
.275
.006
253.37
1.40
6.99
0.15
-450
10.475
.060
.275
.006
266.07
1.52
6.99
0.15
-451
10.975
.060
.275
.006
278.77
1.52
6.99
0.15
-452
11.475
.060
.275
.006
291.47
1.52
6.99
0.15
-453
11.975
.060
.275
.006
304.17
1.52
6.99
0.15
-454
12.475
.060
.275
.006
316.87
1.52
6.99
0.15
-455
12.975
.060
.275
.006
329.57
1.52
6.99
0.15
-456
13.475
.070
.275
.006
342.27
1.78
6.99
0.15
-457
13.975
.070
.275
.006
354.97
1.78
6.99
0.15
-458
14.475
.070
.275
.006
367.67
1.78
6.99
0.15
-459
14.975
.070
.275
.006
380.37
1.78
6.99
0.15
-460
15.475
.070
.275
.006
393.07
1.78
6.99
0.15
-461
15.955
.075
.275
.006
405.26
1.91
6.99
0.15
-462
16.455
.075
.275
.006
417.96
1.91
6.99
0.15
-463
16.955
.080
.275
.006
430.66
2.03
6.99
0.15
-464
17.455
.085
.275
.006
443.36
2.16
6.99
0.15
-465
17.955
.085
.275
.006
456.06
2.16
6.99
0.15
-466
18.455
.085
.275
.006
468.76
2.16
6.99
0.15
-467
18.955
.090
.275
.006
481.46
2.29
6.99
0.15
-468
19.455
.275
494.51
6.99
-469
19.955
.275
507.22
6.99
-470
20.955
.275
532.64
6.99
-471
21.955
.275
558.06
6.99
-472
22.940
.275
583.09
6.99
-473
23.940
.275
608.51
6.99
-474
24.940
.275
633.93
6.99
-475
25.940
.275
659.35
6.99

A full part number is generated by inserting the material identifier between AS568- and -*** with *** being the size of the O-Ring. Some examples of the many materials we can make any of these O-Rings in are:

Examples of Some Common Material Identifiers
NE50: Neoprene, 50 Durometer
NE70: Neoprene, 70 Durometer
NI60: Nitrile (Buna-N), 60 Durometer
EP60: EPDM, 60 Durometer
1056: Silver Plated Aluminum filled Silicone
1167: Silver Plated Copper filled Fluorosilicone
FS70: Fluorosilicone, 70 Durometer
SI70: Silicone, 70 Durometer

Examples of full part numbers are:

AS568-SI70-457 – This indicates a -457 size, as per the chart above, in a 70 Durometer Silicone

1056-0470 – This indicates a -470 size, as per the chart above, in a Silver Plated Aluminum filled Silicone (see EMI/RFI Shielding section for more information)

Postal Address

SAS Industries Inc. PO Box 68
Manorville, NY 11949

Physical Address

939 Wading River Manor Rd.
Manorville, NY 11949

Physical Address

100 Corporate Drive,
Elizabeth City, NC 27909

Call Us at

631.727.1441

Hours Of Operation

Office

Monday to Thrusday: 7:00 AM – 5:00 PM
Friday: 8:00 AM – 12:00 PM
Saturday & Sunday Closed

Factory

Monday to ThuRsday: 7:00 AM – 4:30 PM
Friday, Saturday & Sunday Closed