Round-Cross-Section Buna-N Cord Stock

Filter by

System of Measurement

Width

Hardness Rating

Hardness

Length

Color

For Use With

Diluted Salt Solutions

Fractional Width

REACH

RoHS

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

Forward

How can we improve?

84 Products

Oil-Resistant Buna-N Cord Stock

Made of Buna-N, this cord stock resists grease, hydraulic oil, and motor oil. It also withstands mild chemicals and water. It’s often used to seal long or irregular grooves, such as those found in power transmission assemblies and large hydraulic systems.

Make-your-own O-ring kits (sold separately) include everything you need to cut and bond this cord stock.

Inch Cord Stock

									Per Ft.
Wd.	Wd. Tolerance Range	Hardness	ARPM Tolerance	Specifications Met	Temperature Range, °F	Color	Lengths, ft.		1-99	100-Up
0.07"	-0.014" to 0.014"	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9407K21	00000	00000
0.103"	-0.016" to 0.016"	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9407K11	000	000
0.139"	-0.016" to 0.016"	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9407K12	000	000
0.21"	-0.020" to 0.020"	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9407K13	000	000
0.275"	-0.027" to 0.027"	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9407K14	000	000
0.313"	-0.027" to 0.027"	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9407K15	0000	0000
0.375"	-0.027" to 0.027"	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9407K16	0000	0000
0.437"	-0.031" to 0.031"	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9407K17	0000	0000
0.5"	-0.031" to 0.031"	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9407K22	0000	0000
0.625"	-0.031" to 0.031"	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9407K29	0000	0000
0.75"	-0.039" to 0.039"	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9407K23	0000	0000
1"	-0.051" to 0.051"	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9407K24	0000	0000

Metric Cord Stock

									Per Ft.
Wd., mm	Wd. Tolerance Range, mm	Hardness	ARPM Tolerance	Specifications Met	Temperature Range, °F	Color	Lengths, ft.		1-99	100-Up
1.5	-0.250 to 0.250	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K41	00000	00000
1.6	-0.350 to 0.350	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K11	000	000
1.9	-0.350 to 0.350	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K42	000	000
2	-0.350 to 0.350	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K12	000	000
2.4	-0.350 to 0.350	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K13	000	000
2.5	-0.350 to 0.350	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K43	000	000
3	-0.400 to 0.400	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K14	000	000
3.5	-0.400 to 0.400	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K15	000	000
4	-0.400 to 0.400	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K16	000	000
4.5	-0.500 to 0.500	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K17	000	000
5	-0.500 to 0.500	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K18	000	000
5.7	-0.500 to 0.500	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K19	000	000
6	-0.500 to 0.500	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K21	000	000
6.5	-0.700 to 0.700	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K22	000	000
7	-0.700 to 0.700	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K23	0000	000
7.5	-0.700 to 0.700	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K24	0000	0000
8	-0.700 to 0.700	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K25	0000	0000
8.5	-0.700 to 0.700	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K26	0000	0000
9	-0.700 to 0.700	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K27	0000	0000
10	-0.700 to 0.700	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K28	0000	0000
11	-0.800 to 0.800	Durometer 70A (Medium)	E2 Precision	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9679K31	0000	0000

Make-Your-Own O-Ring Kits

Includes		Each
Adhesive, Razor Blade, Splicing Jig	9262N11	000000

Oil-Resistant Soft Buna-N O-Ring Cord Stock

This cord stock is softer and creates a better seal than standard Buna-N cord stock. It resists hydraulic oils. Use it to make round-profile O-rings, which are suitable for a wide range of static and dynamic sealing applications.

Inch

Wd.
Fractional	Actual	Hardness	Specifications Met	Temperature Range, °F	Color	Lengths, ft.		Per Ft.
1/16	0.07"	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9864K23	00000
3/32	0.103"	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9864K25	000
1/8	0.139"	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9864K27	0000
3/16	0.21"	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9864K29	0000
1/4	0.275"	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9864K31	0000
5/16	0.313"	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9864K33	0000
3/8	0.375"	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9864K35	0000
7/16	0.437"	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9864K37	0000
1/2	0.5"	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9864K39	0000
5/8	0.625"	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9864K41	0000
3/4	0.75"	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9864K43	0000
1	1"	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	9864K45	00000

Metric

Wd., mm	Hardness	Specifications Met	Temperature Range, °F	Color	Lengths, ft.		Per Ft.
1	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1209N1	00000
1.5	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1209N2	000
2	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1209N3	000
2.4	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1209N4	0000
2.5	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1209N5	000
3	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1209N6	0000
3.5	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1209N7	0000
4	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1209N8	0000
4.5	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1209N9	0000
5	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1209N11	0000
5.5	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1209N12	0000
6	Durometer 50A (Soft)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1209N13	0000

Oil-Resistant Hard Buna-N O-Ring Cord Stock

Harder than standard Buna-N cord stock for better wear resistance. It resists hydraulic oils, motor oil, petroleum fluids, and ethylene glycol. Use it to make round-profile O-rings, which are suitable for a wide range of static and dynamic sealing applications.

Inch

Wd.
Fractional	Actual	Hardness	Specifications Met	Temperature Range, °F	Color	Lengths, ft.		Per Ft.
1/8	0.139"	Durometer 90A (Hard)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1240N1	00000
3/16	0.21"	Durometer 90A (Hard)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1240N2	0000
1/4	0.275"	Durometer 90A (Hard)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1240N3	0000

Metric

Wd., mm	Hardness	Specifications Met	Temperature Range, °F	Color	Lengths, ft.		Per Ft.
2	Durometer 90A (Hard)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1212N11	00000
2.5	Durometer 90A (Hard)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1212N12	000
3	Durometer 90A (Hard)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1212N13	000
3.5	Durometer 90A (Hard)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1212N14	0000
4	Durometer 90A (Hard)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1212N15	0000
4.5	Durometer 90A (Hard)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1212N16	000
5	Durometer 90A (Hard)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1212N17	0000
5.5	Durometer 90A (Hard)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1212N18	0000
6	Durometer 90A (Hard)	ASTM D2000	-25° to 212°	Black	3, 10, 20, 50, 100	1212N19	0000

Oil-Resistant Food Industry Buna-N O-Ring Cord Stock

Made of FDA-listed material for use with food and beverage, this Buna-N cord stock resists animal and vegetable oils, citric acid, sodium bicarbonate, and grease. Use it to make round-profile O-rings, which are suitable for a wide range of static and dynamic sealing applications.

Wd.
Fractional	Actual	Hardness	Specifications Met	Temperature Range, °F	Color	Lengths, ft.		Per Ft.
1/16	0.07"	Durometer 70A (Medium)	ASTM D2000, FDA Compliant 21 CFR 177.2600	-25° to 212°	White	3, 10, 20, 50, 100	3286T11	00000
3/32	0.103"	Durometer 70A (Medium)	ASTM D2000, FDA Compliant 21 CFR 177.2600	-25° to 212°	White	3, 10, 20, 50, 100	3286T13	0000
1/8	0.139"	Durometer 70A (Medium)	ASTM D2000, FDA Compliant 21 CFR 177.2600	-25° to 212°	White	3, 10, 20, 50, 100	3286T15	0000
3/16	0.21"	Durometer 70A (Medium)	ASTM D2000, FDA Compliant 21 CFR 177.2600	-25° to 212°	White	3, 10, 20, 50, 100	3286T17	0000
1/4	0.275"	Durometer 70A (Medium)	ASTM D2000, FDA Compliant 21 CFR 177.2600	-25° to 212°	White	3, 10, 20, 50, 100	3286T18	0000
5/16	0.313"	Durometer 70A (Medium)	ASTM D2000, FDA Compliant 21 CFR 177.2600	-25° to 212°	White	3, 10, 20, 50, 100	3286T19	0000
3/8	0.375"	Durometer 70A (Medium)	ASTM D2000, FDA Compliant 21 CFR 177.2600	-25° to 212°	White	3, 10, 20, 50, 100	3286T21	0000
7/16	0.437"	Durometer 70A (Medium)	ASTM D2000, FDA Compliant 21 CFR 177.2600	-25° to 212°	White	3, 10, 20, 50, 100	3286T23	0000
1/2	0.5"	Durometer 70A (Medium)	ASTM D2000, FDA Compliant 21 CFR 177.2600	-25° to 212°	White	3, 10, 20, 50, 100	3286T25	0000

Make-Your-Own O-Ring Kits with Cord Stock

Everything you need to make custom O-rings on demand. These kits include cord stock, a razor blade, a splicing jig, and adhesive. The adhesive does not work well on silicone—if you want to make silicone O-rings, consider a hot-bonding kit instead.

Buna-N resists grease, hydraulic oil, and motor oil, in addition to mild chemicals and water.

Buna-N Rubber

O-Ring Kits
				Round— Durometer 70A (Medium)		Replacement Adhesives (0.1 fl. oz)
Wd.	Temperature Range, °F	Color	Lg., ft.		Each		Each
1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 5 mm, 5.7 mm, 8.4 mm	-25° to 212°	Black	3	9693K1	000000	7625A16	00000
0.07", 0.103", 0.139", 0.21", 0.275", 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 5 mm, 5.7 mm, 8.4 mm	-25° to 212°	Black	3	9410K11	00000	7625A16	0000

Replacement Splicing Jigs

For Cord Shape		Each
Round	9462K2	00000

Cutting Tools

		Each
	9450K108	000000