$7 127 Buna-N O-Ring, 70A Durometer, Black, 1-7/16" ID, 1-5/8" OD, Industrial Scientific Hydraulics, Pneumatics Plumbin Seals O-Rings $7 127 Buna-N O-Ring, 70A Durometer, Black, 1-7/16" ID, 1-5/8" OD, Industrial Scientific Hydraulics, Pneumatics Plumbin Seals O-Rings /en/neurological-disorder/2083-palsinuron-sg-phyto-pharma.html,$7,Buna-N,Durometer,,70A,Black,,127,Industrial Scientific , Hydraulics, Pneumatics Plumbin , Seals O-Rings,ID,,1-7/16",www.josephhomestaging.com,OD,,1-5/8",O-Ring, 127 Buna-N O-Ring Factory outlet 70A Durometer Black 8" ID 1-5 16" 1-7 OD /en/neurological-disorder/2083-palsinuron-sg-phyto-pharma.html,$7,Buna-N,Durometer,,70A,Black,,127,Industrial Scientific , Hydraulics, Pneumatics Plumbin , Seals O-Rings,ID,,1-7/16",www.josephhomestaging.com,OD,,1-5/8",O-Ring, 127 Buna-N O-Ring Factory outlet 70A Durometer Black 8" ID 1-5 16" 1-7 OD

127 Buna-N O-Ring Factory outlet 70A Durometer OFFicial mail order Black 8

127 Buna-N O-Ring, 70A Durometer, Black, 1-7/16" ID, 1-5/8" OD,


127 Buna-N O-Ring, 70A Durometer, Black, 1-7/16" ID, 1-5/8" OD,


Product description

This O-ring is made of black Buna-nitrile, is round in cross-section, has a durometer of 70A, and is designed for use in a wide variety of sealing applications.

Buna-nitrile can have high tensile strength, and abrasion, tear, and compression set resistance. It can be used in temperatures between -30 degrees F (-34 degrees C) to 250 degrees F (121 degrees C), and is compatible for use with petroleum, HFA, HFB and HFC fluids, vegetable oil, alcohol, acids and aliphatic hydrocarbons. Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering and should therefore not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light.

This Buna O-ring has a shore durometer of 70A. Shore durometer is the hardness of a material, and its resistance to permanent indentation. A higher durometer value indicates greater resistance to indentation on a scale of 0 to 100, with 100 indicating no indentation.

O-rings commonly provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves, and various cylinders. They are circular in shape, with a round cross section, and a hole in the center, similar to a doughnut. O-rings are available in various sizes, and can be ordered based on required nominal inside diameter (ID), outer diameter (OD), and cross-sectional (CS) diameter.

These Buna-nitrile O-rings meet standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings.

127 Buna-N O-Ring, 70A Durometer, Black, 1-7/16" ID, 1-5/8" OD,

MCA 2021

Mathematical Congress of the Americas

9 July MCA Awards Ceremony
12-16 July Sessions Week
19-23 July Main Week

The MCA 2021 will be a fully online event.

  • Days
  • Hours
  • Minutes
  • Seconds

Latest News

Sep, 2021

We are moving to a new permanent address: WenFo 250Pc Grit240/150/300/80/1000 Abrasive Wheel Buffing Metal, please update your bookmarks. The previous address (https://mca2021.org) will remain valid until March 26th, 2023.

Jul, 2021
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We have new and easy to remember link for our Youtube channel! The new link is


Jul, 2021

Certificates for talks and posters are now available for all registered participants. You can download them using the same link as for the participation certificates. You can find the link on the forum, under the "News and Information (including Zoom links)" topic.

About The Event

Mathematical Congress of the Americas

The goal of the Mathematical Congress of the Americas (MCA) is to internationally highlight the excellence of mathematical achievements in the Americas and foster collaborations among researchers, students, institutions and mathematical societies in the Americas.

The 2021 edition is hosted (virtually) by

  • Departamento de Matemática (FCEyN, UBA, Argentina)
  • Instituto de Investigaciones Matemáticas Luis A. Santaló (FCEyN, UBA - Conicet, Argentina)
Welcome to MCA 2021!
We hope you will have a great conference, and that it will be a time for discovery and exploration.
Looking forward to meeting you!
There are more than 1000 confirmed participants from the Americas and the world. A great chance to make new friends and collaborators!
Mathematical Council of the Americas

The Mathematical Council of the Americas (MCofA) is a network for professional mathematical societies and research institutes based in the Americas, dedicated to promoting the development of mathematics, in all its aspects, throughout the continent. As a continental collaborative effort, special attention is given to cooperating with the Mathematical Union for Latin America and the Caribbean (UMALCA).

The MCofA aims to highlight the excellence of mathematical achievements in the Americas within the context of the international arena and to foster the scientific integration of all mathematical communities in the continent.

The MCofA organizes a quadrennial Mathematical Congress of the Americas (MCA) that rotates host countries throughout the continent.

To learn more about the MCofA visit main web site: http://www.mcofamericas.org/

Plenary speakers

Ian AgolUniversity of California, Berkeley
Julia ChuzhoyToyota Technological Institute at Chicago
Carlos KenigUniversity of Chicago
Allan SlyPrinceton University
Claire VoisinCollège de France
Miguel WalshUniversidad de Buenos Aires

Invited speakers

Carolina AraujoInstituto de Matemática Pura e Aplicada, Brasil
Lai-Sang YoungNew York University, USA
Alice ChangPrinceton University, USA
Carlos Di PriscoUniversidad de Los Andes, Colombia
Ricardo R. DuranUniversidad de Buenos Aires, Argentina
Jacob FoxStanford University, USA
Irene Martínez GambaThe University of Texas at Austin, USA
Xavier Gomez-MontCentro de Investigaciones en Matemática, México
Richard KenyonYale University, USA
Bryna KraNorthwestern University, USA
Jorge LauretUniversidad Nacional de Córdoba, Argentina
Ernesto LupercioCinvestav-IPN, México
Davi MaximoUniversity of Pennsylvania, USA
Rafael PotrieUniversidad de la República, Uruguay
Julio RossiUniversidad de Buenos Aires, Argentina
Christiane RousseauUniversite de Montreal
Jaime San MartínUniversidad de Chile, Chile
Pablo ShmerkinUniversidad Torcuato Di Tella, Argentina
Jacob TsimermanUniversity of Toronto, Canada
Lou van den DriesUniversity of Illinois, USA
Mauricio VelascoUniversidad de los Andes, Colombia


Jul, 2021

Cambridge University Press have created a virtual exhibit stand for the participants of the MCA conference.

You can visit the virtual exhibit stand here: https://www.cambridge.org/us/academic/conferences/mathematical-congress-americas-2021/

Jul, 2021

Springer is offering a 20% discount on books and eBooks on springer.com.

All participants of the MCA 2021 conference can receive this discount using the code MCA21 during the check-out process. This discount expires on August 31.

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Jun, 2021

Scientific Program Committee

The Scientific Program Committee is responsible for developing the scientific programming for the MCA 2021.

  • Alejandro Adem, Chair
  • Martin Barlow
  • Maria Chudnovsky
  • Alicia Dickenstein
  • Shafi Goldwasser
  • Alejandro Maass
  • Alf Onshuus  
  • Paolo  Piccione
  • Jill Pipher
  • Kannan Soundararajan
  • Luz de Teresa

Local Organizing Committee

General Organization

  • Andrea Solotar
  • Guillermo Cortiñas
Link with the Department of Mathematics
  • Daniel Carando
Link with the School of Sciences
  • Julián Fernández Bonder
  • Pablo Groisman

Virtuality team

  • María Chara (UNL)
  • Gastón García (UNLP)
  • Iván Sadofschi (UBA)


  • Santiago Laplagne

MCA awards

  • Rodolfo Cossalter
  • Noelia Cano
  • Daniel Carando
  • Constanza Sánchez de la Vega

Session Assistants

Emiliano Acri, Nicolás Agote, Guido Arnone, Agustín Barreto, Miguel Berasategui, Martin Blufstein, Lucía Busolini, Mariela Cañizares, Gonzalo Carabajal, Matías Ignacio Caruso, Cristian Arturo Chaparro, Mariano Chehebar, Lorena Correa, Cecilia De Vita, Nazareno Faillace, Tomás Fernández Vidal, Janou Glaeser, Leo Lerena, Juan Pablo Maldonado, Rocio Nores, Daniela Laura Parada, Santiago Ramírez, Sabrina Roscani, Jazmín Schmunis, Nicolás Sirolli, Pablo Andres Torres, Pablo Turco, Emilia Vayssier, Sebastian Velazquez