What factors should I consider when choosing the right sputtering target?

Consider the material composition, purity, target size, and application-specific requirements such as the thickness and uniformity of the film.

Do you offer custom sputtering targets or evaporation materials?

Yes, we offer customized sputtering targets, evaporation materials, and crucibles to meet specific customer requirements for size, material composition, and purity.

Can you provide advice on the optimal material for a specific thin film application?

Yes, we can assist in selecting the most suitable material based on your application, whether it’s for optical coatings, semiconductor fabrication, or decorative finishes.

Can you supply small quantities of materials for research and development purposes?

Yes, we offer both bulk and small quantities of sputtering targets, evaporation materials, and spherical powders to support research, prototyping, and development projects.

Buna-N (Nitrile) O-Rings (0.275 Section)

Buna-N (Nitrile) O-Rings (0.275 Section): General-Purpose Sealing for Oil, Fuel, and Hydraulic Applications

Buna-N (Nitrile) O-Rings (0.275 section) from TFM deliver reliable and cost-effective sealing performance in systems that involve petroleum-based fluids, fuels, and hydraulic oils. Manufactured from 4900-70 grade nitrile rubber, these O-rings are black in color and offer a durometer hardness of 70 Shore A, making them well-suited for static and light dynamic sealing tasks in industrial, automotive, and mechanical equipment environments.

With a cross-sectional diameter of 0.275 inches, this size is ideal for heavy-duty sealing applications that demand resilience to oil swell, abrasion, and moderate pressure.

Product Specifications:

Material Grade: 4900-70 Buna-N (Nitrile)
Color: Black
Durometer Hardness: 70 Shore A
Cross-Section Diameter: 0.275 inches
Temperature Range: –35°C to +110°C

Key Features:

Excellent sealing performance against petroleum-based oils, gasoline, diesel, and hydraulic fluids
Good abrasion resistance and mechanical strength in static applications
Ideal for general-purpose use, especially in non-corrosive environments
Cost-effective option for systems not requiring extreme chemical or thermal resistance

Not Recommended For:

Applications involving ozone, sunlight (UV), or strong acids and solvents
Use with automotive brake fluid, ketones, or chlorinated hydrocarbons

Common Applications:

Hydraulic pumps, cylinders, and valves
Fuel handling systems and storage equipment
Compressors, gearboxes, and lubrication systems
General plumbing and mechanical sealing

TFM’s Buna-N (Nitrile) O-Rings (0.275 section) are a trusted solution for sealing tasks where oil resistance, affordability, and durability are key performance factors.

Ordering Table

Drawing	Reference	O-Ring Size	O-Ring Material	O-Ring OD	O-Ring ID	O-Ring Cross Section	O-Ring Color	Part Number
	O-ring Seals, Nitrile (Buna-N)	400	4900-70 Nitrile	1.900	1.350	0.275	Black	O-B400
	O-ring Seals, Nitrile (Buna-N)	401	4900-70 Nitrile	2.025	1.475	0.275	Black	O-B401
	O-ring Seals, Nitrile (Buna-N)	402	4900-70 Nitrile	2.150	1.600	0.275	Black	O-B402
	O-ring Seals, Nitrile (Buna-N)	403	4900-70 Nitrile	2.275	1.725	0.275	Black	O-B403
	O-ring Seals, Nitrile (Buna-N)	404	4900-70 Nitrile	2.400	1.850	0.275	Black	O-B404
	O-ring Seals, Nitrile (Buna-N)	405	4900-70 Nitrile	2.525	1.975	0.275	Black	O-B405
	O-ring Seals, Nitrile (Buna-N)	406	4900-70 Nitrile	2.650	2.100	0.275	Black	O-B406
	O-ring Seals, Nitrile (Buna-N)	407	4900-70 Nitrile	2.775	2.225	0.275	Black	O-B407
	O-ring Seals, Nitrile (Buna-N)	408	4900-70 Nitrile	2.900	2.350	0.275	Black	O-B408
	O-ring Seals, Nitrile (Buna-N)	409	4900-70 Nitrile	3.025	2.475	0.275	Black	O-B409
	O-ring Seals, Nitrile (Buna-N)	410	4900-70 Nitrile	3.150	2.600	0.275	Black	O-B410
	O-ring Seals, Nitrile (Buna-N)	411	4900-70 Nitrile	3.275	2.725	0.275	Black	O-B411
	O-ring Seals, Nitrile (Buna-N)	412	4900-70 Nitrile	3.400	2.850	0.275	Black	O-B412
	O-ring Seals, Nitrile (Buna-N)	413	4900-70 Nitrile	3.525	2.975	0.275	Black	O-B413
	O-ring Seals, Nitrile (Buna-N)	414	4900-70 Nitrile	3.650	3.100	0.275	Black	O-B414
	O-ring Seals, Nitrile (Buna-N)	415	4900-70 Nitrile	3.775	3.225	0.275	Black	O-B415
	O-ring Seals, Nitrile (Buna-N)	416	4900-70 Nitrile	3.900	3.350	0.275	Black	O-B416
	O-ring Seals, Nitrile (Buna-N)	417	4900-70 Nitrile	4.025	3.475	0.275	Black	O-B417
	O-ring Seals, Nitrile (Buna-N)	418	4900-70 Nitrile	4.150	3.600	0.275	Black	O-B418
	O-ring Seals, Nitrile (Buna-N)	419	4900-70 Nitrile	4.275	3.725	0.275	Black	O-B419
	O-ring Seals, Nitrile (Buna-N)	420	4900-70 Nitrile	4.400	3.850	0.275	Black	O-B420
	O-ring Seals, Nitrile (Buna-N)	421	4900-70 Nitrile	4.525	3.975	0.275	Black	O-B421
	O-ring Seals, Nitrile (Buna-N)	422	4900-70 Nitrile	4.650	4.100	0.275	Black	O-B422
	O-ring Seals, Nitrile (Buna-N)	423	4900-70 Nitrile	4.775	4.225	0.275	Black	O-B423
	O-ring Seals, Nitrile (Buna-N)	424	4900-70 Nitrile	4.900	4.350	0.275	Black	O-B424
	O-ring Seals, Nitrile (Buna-N)	425	4900-70 Nitrile	5.025	4.475	0.275	Black	O-B425
	O-ring Seals, Nitrile (Buna-N)	426	4900-70 Nitrile	5.150	4.600	0.275	Black	O-B426
	O-ring Seals, Nitrile (Buna-N)	427	4900-70 Nitrile	5.275	4.725	0.275	Black	O-B427
	O-ring Seals, Nitrile (Buna-N)	428	4900-70 Nitrile	5.400	4.850	0.275	Black	O-B428
	O-ring Seals, Nitrile (Buna-N)	429	4900-70 Nitrile	5.525	4.975	0.275	Black	O-B429
	O-ring Seals, Nitrile (Buna-N)	430	4900-70 Nitrile	5.650	5.100	0.275	Black	O-B430
	O-ring Seals, Nitrile (Buna-N)	431	4900-70 Nitrile	5.775	5.225	0.275	Black	O-B431
	O-ring Seals, Nitrile (Buna-N)	432	4900-70 Nitrile	5.900	5.350	0.275	Black	O-B432
	O-ring Seals, Nitrile (Buna-N)	433	4900-70 Nitrile	6.025	5.475	0.275	Black	O-B433
	O-ring Seals, Nitrile (Buna-N)	434	4900-70 Nitrile	6.150	5.600	0.275	Black	O-B434
	O-ring Seals, Nitrile (Buna-N)	435	4900-70 Nitrile	6.275	5.725	0.275	Black	O-B435
	O-ring Seals, Nitrile (Buna-N)	436	4900-70 Nitrile	6.400	5.850	0.275	Black	O-B436
	O-ring Seals, Nitrile (Buna-N)	437	4900-70 Nitrile	6.525	5.975	0.275	Black	O-B437
	O-ring Seals, Nitrile (Buna-N)	438	4900-70 Nitrile	6.775	6.225	0.275	Black	O-B438
	O-ring Seals, Nitrile (Buna-N)	439	4900-70 Nitrile	7.025	6.475	0.275	Black	O-B439
	O-ring Seals, Nitrile (Buna-N)	440	4900-70 Nitrile	7.275	6.725	0.275	Black	O-B440
	O-ring Seals, Nitrile (Buna-N)	441	4900-70 Nitrile	7.525	6.975	0.275	Black	O-B441
	O-ring Seals, Nitrile (Buna-N)	442	4900-70 Nitrile	7.775	7.225	0.275	Black	O-B442
	O-ring Seals, Nitrile (Buna-N)	443	4900-70 Nitrile	8.025	7.475	0.275	Black	O-B443
	O-ring Seals, Nitrile (Buna-N)	444	4900-70 Nitrile	8.275	7.725	0.275	Black	O-B444
	O-ring Seals, Nitrile (Buna-N)	445	4900-70 Nitrile	8.525	7.975	0.275	Black	O-B445
	O-ring Seals, Nitrile (Buna-N)	446	4900-70 Nitrile	9.025	8.475	0.275	Black	O-B446
	O-ring Seals, Nitrile (Buna-N)	447	4900-70 Nitrile	9.525	8.975	0.275	Black	O-B447
	O-ring Seals, Nitrile (Buna-N)	448	4900-70 Nitrile	10.025	9.475	0.275	Black	O-B448
	O-ring Seals, Nitrile (Buna-N)	449	4900-70 Nitrile	10.525	9.975	0.275	Black	O-B449
	O-ring Seals, Nitrile (Buna-N)	450	4900-70 Nitrile	11.025	10.475	0.275	Black	O-B450
	O-ring Seals, Nitrile (Buna-N)	451	4900-70 Nitrile	11.525	10.975	0.275	Black	O-B451
	O-ring Seals, Nitrile (Buna-N)	452	4900-70 Nitrile	12.025	11.475	0.275	Black	O-B452
	O-ring Seals, Nitrile (Buna-N)	453	4900-70 Nitrile	12.525	11.975	0.275	Black	O-B453
	O-ring Seals, Nitrile (Buna-N)	454	4900-70 Nitrile	13.025	12.475	0.275	Black	O-B454
	O-ring Seals, Nitrile (Buna-N)	455	4900-70 Nitrile	13.525	12.975	0.275	Black	O-B455
	O-ring Seals, Nitrile (Buna-N)	456	4900-70 Nitrile	14.007	13.457	0.275	Black	O-B456
	O-ring Seals, Nitrile (Buna-N)	457	4900-70 Nitrile	14.525	13.975	0.275	Black	O-B457
	O-ring Seals, Nitrile (Buna-N)	458	4900-70 Nitrile	15.025	14.475	0.275	Black	O-B458
	O-ring Seals, Nitrile (Buna-N)	459	4900-70 Nitrile	15.525	14.975	0.275	Black	O-B459
	O-ring Seals, Nitrile (Buna-N)	460	4900-70 Nitrile	16.025	15.475	0.275	Black	O-B460
	O-ring Seals, Nitrile (Buna-N)	461	4900-70 Nitrile	16.505	15.955	0.275	Black	O-B461
	O-ring Seals, Nitrile (Buna-N)	462	4900-70 Nitrile	17.005	16.455	0.275	Black	O-B462
	O-ring Seals, Nitrile (Buna-N)	463	4900-70 Nitrile	17.505	16.955	0.275	Black	O-B463
	O-ring Seals, Nitrile (Buna-N)	464	4900-70 Nitrile	18.005	17.455	0.275	Black	O-B464
	O-ring Seals, Nitrile (Buna-N)	465	4900-70 Nitrile	18.505	17.955	0.275	Black	O-B465
	O-ring Seals, Nitrile (Buna-N)	466	4900-70 Nitrile	19.005	18.455	0.275	Black	O-B466
	O-ring Seals, Nitrile (Buna-N)	467	4900-70 Nitrile	19.505	18.955	0.275	Black	O-B467
	O-ring Seals, Nitrile (Buna-N)	468	4900-70 Nitrile	20.005	19.455	0.275	Black	O-B468
	O-ring Seals, Nitrile (Buna-N)	469	4900-70 Nitrile	20.505	19.955	0.275	Black	O-B469
	O-ring Seals, Nitrile (Buna-N)	470	4900-70 Nitrile	21.505	20.955	0.275	Black	O-B470
	O-ring Seals, Nitrile (Buna-N)	471	4900-70 Nitrile	22.505	21.955	0.275	Black	O-B471
	O-ring Seals, Nitrile (Buna-N)	472	4900-70 Nitrile	23.490	22.940	0.275	Black	O-B472
	O-ring Seals, Nitrile (Buna-N)	473	4900-70 Nitrile	24.490	23.940	0.275	Black	O-B473
	O-ring Seals, Nitrile (Buna-N)	474	4900-70 Nitrile	25.490	24.940	0.275	Black	O-B474
	O-ring Seals, Nitrile (Buna-N)	475	4900-70 Nitrile	26.490	25.940	0.275	Black	O-B475