Bearing Argentina
Bearing Argentina
Vickers Piston Pump PV Series   FAG Bearing   NSK Bearing  
  • Home
  • Product Categories
    • Vickers Piston Pump PV Series
    • FAG Bearing
    • NSK Bearing
    • NTN Bearing
    • SKF Bearing
    • Timken Bearing
    • AMI Bearing
    • BOSTON GEAR BEARING
    • BROWNING BEARING
    • CONSOLIDATED BEARING
    • COOPER BEARING
    • DODGE Bearing
    • EBC BEARING
    • GARLOCK Bearing
    • GENERAL BEARING
    • HUB CITY BEARING
    • IPTCI Bearing
    • ISOSTATIC Bearing
    • REXROTH Check valves
    • REXROTH Pressure relief valve
    • REXROTH Pressure reducing valve
    • REXROTH Throttle valves
    • REXROTH Throttle check valve
    • REXROTH HY-CHECK VALVE
    • REXROTH Directional poppet valves
    • REXROTH Twin throttle check valve
    • REXROTH Throttle check valves
    • REXROTH Directional spool valves
    • REXROTH Valves
  • Company Profile
    • Company Introduction
  • Technical Articles
  • Contact Us

Home>Products>FAG Bearing>5 mm x 19 mm x 6 mm FAG 635 Single Row Ball Bearings

English
English
  • 5 mm x 19 mm x 6 mm FAG 635 Single Row Ball Bearings
  • 5 mm x 19 mm x 6 mm FAG 635 Single Row Ball Bearings
  • 5 mm x 19 mm x 6 mm FAG 635 Single Row Ball Bearings
  • 5 mm x 19 mm x 6 mm FAG 635 Single Row Ball Bearings

5 mm x 19 mm x 6 mm FAG 635 Single Row Ball Bearings

  • What are the types of Bearing Argentina 5 mm x 19 mm x 6 mm FAG 635 Single Row Ball Bearings ? FAG Bearing Manufacturing 5 mm x 19 mm x 6 mm 7 Days Days to Ship Service . Get Your Free, Instant price, design review.

  • What is 635 bearing cross reference？

  • FAG

  • 635

  • 1045 Carbon Steel
  • 7 Days
  • Yes (with retaining
  • Bearings with Housin
  • [Steel] Steel
  • Flanged Pilot Type
  • Deep Groove Ball Bea
  • Electroless Nickel P
Contact NowChat Now
Bearing Argentina

Bearing ArgentinaChina

  • Bearing Argentina2020-07-10 09:46:19
    Welcome to my shop! Glad to serve you! Please send your question!
Price Inspection Certificate Product Specifications Company Profile

5 mm x 19 mm x 6 mm FAG 635 Single Row Ball BearingsProducts and services

Housing Material: 1045 Carbon Steel Days to Ship: 7 Days Bearing Retained: Yes (with retaining
Type: Bearings with Housin Bearing Material: [Steel] Steel Shape: Flanged Pilot Type
Bearing Used: Deep Groove Ball Bea Holder Surface Treatment: Electroless Nickel P Width T(mm): 10
Size (mm): 5 mm x 19 mm x 6 mm
5 mm x 19 mm x 6 mm FAG 635 Single Row Ball Bearings pdf

5 mm x 19 mm x 6 mm FAG 635 Single Row Ball BearingsSystems

da min39 mm
D37 mm
Max operating temperature, Tmax120 °C
Dw2 mm
C30 mm
Cr14.2 kN
Min operating temperature, Tmin-20 °C
a37.7 mm
Minimum Buy QuantityN/A
Lw13.8 mm

How to Identify 5 mm x 19 mm x 6 mm FAG 635 Single Row Ball Bearings by Bearing Number


  • FAG 506872 Angular Contact Ball Bearings

    Torque Symbol:No; Bearing Style:Double Shielded; O.D.(Ø):90; Outer Ring:With Outer Ring; Torque Symbol:No; Inner/Outer Ring Material:[Steel] Steel; Load Direction:Radial; Retainer Type:Punching; Accuracy(Class):Class 0; Type:Ball;
    Read More ...

  • FAG NU2324-E-M1A-C3 Cylindrical Roller Bearings

    Characteristic rolling element frequency, BSF:5.26 Hz; Characteristic cage frequency, FTF:0.41 Hz; Mass:0.78 kg; Nlim (grease):6,000 rpm; Brand:NTN; D:110 mm; B:22 mm; f0:14.3; da min:68 mm; Static load, C0:36 kN;
    Read More ...

  • FAG NU344-E-TB-M1-C3 Roller Bearings

    Shape:Flange Type; Bearing Part Number:6802; Bearing Retained:No; Housing Material:304 Stainless Steel; Width T(mm):25; Type:Bearings with Housin; Days to Ship:8 Days; Shape:Flange Type; RoHS:6; Number of Bearings:Double;
    Read More ...

  • FAG 32219-A Tapered Roller Bearing Assemblies

    H:180 mm; e:20 mm; T min.:-40 °C; T max.:100 °C; J:148.5 mm; S:10.2 mm; Weight:1.95 kg; d:41.28 mm; G:R1/8"; H3:105;
    Read More ...

  • FAG 7203-B-TVP-P5-UL Angular Contact Ball Bearings

    da min:39 mm; D:37 mm; Max operating temperature, Tmax:120 °C; Dw:2 mm; C:30 mm; Cr:14.2 kN; Min operating temperature, Tmin:-20 °C; a:37.7 mm; Minimum Buy Quantity:N/A; Lw:13.8 mm;
    Read More ...

  • FAG 6301-C3 Single Row Ball Bearings

    Bearing Used:Deep Groove Ball Bea; Type:Bearings with Housin; Bearing Retained:No; Days to Ship:7 Days; Bearing Used:Deep Groove Ball Bea; Seals:DD (Contact Rubber S; Flange Shape:Round Type; Number of Bearings:Single; Bearing Part Number:6901; Volume Discount:Available;
    Read More ...

  • FAG HC71911-C-T-P4S-DUL Precision Ball Bearings

    Designation of bearing:UK208G2H-22; A3:2 mm; C:29.6 kN; G:M6x1; T max.:100 °C; B:29 mm; Designation of housing:C208-; T min.:-20 °C; Weight:1.34 kg; C0:18.2 kN;
    Read More ...

  • FAG QJ234-N2-MPA Angular Contact Ball Bearings

    Number of Bearings:Double; Housing Material:[Aluminum Alloy] 201; Volume Discount:Available; Bearing I.D. d(mm):15; Bearing Retained:No; Bearing Used:Deep Groove Ball Bea; Holder Surface Treatment:Clear Anodize; Type:Bearings with Housin; Width T(mm):45; Volume Discount:Available;
    Read More ...

  • FAG 71904 E-T- P4S-UL Precision Ball Bearings

    A1:37 mm; N1:23 mm; Designation of closed end cover:SCC209; Designation of housing:P209N-; Designation of open end cover:SCOU209-26; L:190 mm; C0:20.8 kN; Z:70 mm; Weight:2.55 kg; T max.:200 °C;
    Read More ...

  • FAG 3204-BC-TNH Angular Contact Ball Bearings

    e:2.5 mm; Recommended tightening torque for set screw:5.5 Nm; L:115 mm; A1:9 mm; J:90 mm; Weight:0.81 kg; G:M6x1; S:14.3 mm; Designation of housing:FCE205-; A2:22.2 mm;
    Read More ...

  • FAG NJ205-E-M1 Cylindrical Roller Bearings

    Shape:Flange Type; RoHS:6; Volume Discount:Available; Holder Surface Treatment:Clear Anodize; Shape:Flange Type; Number of Bearings:Double; Days to Ship:7 Days; Bearing Part Number:6903; Housing Material:[Aluminum Alloy] 201; Bearing Retained:Yes (with retaining;
    Read More ...

  • FAG NU328-E-M1-F1-T51F Cylindrical Roller Bearings

    A1:16 mm; d:38.1 mm; S:9 mm; Designation of open end cover:SCOU208-24; Dz:88 mm; L1:88 mm; P:300 mm; Recommended tightening torque for set screw:8 Nm; A5:25 mm; Weight:2.37 kg;
    Read More ...

  • FAG NJ206-E-M1A-C3 Cylindrical Roller Bearings

    A1:22 mm; P:300 mm; d:57.15 mm; H1:130 mm; T max.:100 °C; A5:30.9 mm; L2:19 mm; C0:32.8 kN; A2:42 mm; H:146 mm;
    Read More ...

  • FAG 7040-B-MP-UA Angular Contact Ball Bearings

    B:45.3 mm; Weight:3.24 kg; C:43.55 kN; Dz:110 mm; Designation of bearing:US211-32G2; J:184 mm; A2:58.5 mm; e:25 mm; A1:20 mm; L1:104 mm;
    Read More ...

  • FAG 7409-B-MP-UO Angular Contact Ball Bearings

    ra max:2 mm; Static load, C0:287 kN; Da max:129 mm; Min operating temperature, Tmin:-20 °C; D:140 mm; Characteristic inner ring frequency, BPFI:10.88 Hz; k:3.5 mm; d:80 mm; da min:91 mm; B:33 mm;
    Read More ...

 

Frequently bought 5 mm x 19 mm x 6 mm FAG 635 Single Row Ball Bearings together
TDJSdGEA
NJ205-E-M1 - - - - - - - -
506872 - - - - - - - -
32219-A - - 148.5 mm10.2 mm41.28 mmR1/8" - -
7203-B-TVP-P5-UL - 37 mm - - - - - -
7409-B-MP-UO - 140 mm - - 80 mm - - -
635 - - - - - - - -
7040-B-MP-UA - - 184 mm - - - - -
3204-BC-TNH - - 90 mm14.3 mm - M6x1 - -
71904 E-T- P4S-UL - - - - - - - -
NU344-E-TB-M1-C3 - - - - - - - -
NU328-E-M1-F1-T51F - - - 9 mm38.1 mm - - -
QJ234-N2-MPA - - - - - - - -
HC71911-C-T-P4S-DUL - - - - - M6x1 - -
6301-C3 - - - - - - - -
NU2324-E-M1A-C3 - 110 mm - - - - - -
NJ206-E-M1A-C3 - - - - 57.15 mm - - -
231/560-K-MB-C3 - - - - 17 mm - - -
HSS7016-E-T-P4S-DUL - - - - - - - -
23148-B-K-MB-C3-T52BW - - 56 mm - - M6x1 - -
QJ308MPA-S1 - - - - - - - -
6305-M-C4 - - - - 12.7 mm - 10 mm32 mm
NUP314-E-N-M1-C3 - - - - - - - -
6003-H36D-J22G - - - - 17.46 mm - - -
HC7013-C-T-P4S-UL - 42 - - - - - -
52322-MP - - - - - - - -
6208-C4 - - - 12.7 mm - M6x1 - -
6052-M-C3 - - 71.4 mm7.5 mm19.05 mm - - -
23180-B-MB-C3-H140 - - 130 mm - - R1/8" - -
NU1016-M1 - - - - - - - -
6211-RSR - - - - - - - -
N207-E-M1-C3 - - - - - - - -
2302-2RS-TVH - - 111 mm - 47.62 mm - - -
B71902-C-T-P4S-UL - - 94.5 mm - - M6x1 - 32 mm
618/560-M-C3 - - - - 75 - - -
7206-B-MP - - - - - - - -
6002-2VSR-NR-C4-S1 - 42 - - 30 - - -
7411-B-MP-UA - - - 7 mm19.05 mm - - -
6209-TB - 72 - - - - - -
6212-RSR-C3 - - 56 mm - - M6x115 mm38 mm
6302-RSR-C3 - - - - - - - -
6217-2Z - - - - - - - -
NJ2206-E-TVP2-C3 - - - - - - - -
6205-HT1 - - - - - - - -
B71924-E-T-P4S-K5-UL - - - - - - - -
22320-E1 - - - 23.4 mm - - - -
23028-E1A-M-C4 - - - - 38.1 mmR1/8" - -
6321 - - - - - - - -
QJ314-MPA - - - - - - - -
NJ2312-E-TVP2-C4 - 85 - - - - - -
7317-B-MP-UL - - - - - - - -
B71912-C-T-P4S-DUL - - - - - - - -
3303-B-2Z-TNH - - - - - - - -
NJ2208-E-M1A-C4 - - - - - - - -
23084-E1A-K-MB1-C3 - - - - - - - -
51172-MP - - - - 25 mm - - -
NU322-E-TVP2-C3 - - - - - - - 26 mm
22318-E1-C4 - 52 mm - - 25 mm - - -
B7017-C-T-P4S-DUM - - - - - - - -
6318-Z-J19A - - - - - - - -
52238-FP - - 150 mm19 mm - R1/8" - -
6221-2RSR-P5 - - - - - - - -
B7222-E-T-P4S-UL - - - - - - - -
24072-E1A-MB1 - - - - - - - -
22234-E1A-K-M-C3 - - - - - - - -
6228-M-C4 - - 151.5 mm - - - - 54 mm
30319-A - - - 22.2 mm55.56 mmR1/8" - 48.5 mm
NJ2322-E-M1-C4 - 140 - - - - - -
6004-2Z-C3 - - 68 mm17.5 mm - - - -
3306-BD-2HRS - - - - - - - -
HCS7009-C-T-P4S-DUL - - - - - - - -
HC7014-C-T-P4S-UL - - - 6 mm17.46 mm - - 20 mm
B71938-E-T-P4S-TUL - 55 - - 30 - - -
NUP2309-E-TVP2-C3 - - - - 33.34 mm - - -
NU236-E-M1-C2 - - - - 55 - - -
31328-X - - - - - - - -
6202-2Z - - - - 23.81 mm - - 32 mm
6213-Z-NR-C3 - - - - - - - -
3310-BC-JH-C3 - - - 18.2 mm28.58 mm - - 31 mm
7024-MP-UA - - - - 50 - - -
3309-BD - - - - - - - -
51208 - - - - 20 mm - - -
6311-P53 - - - - 70 - - -
NJ2320-E-M1A-QP51-C3 - - - 17.5 mm - - - -
23264-K-MB-C4 - - - - - - - -
NUP411-M1 - - - - - - - -
B7206-E-T-P4S-UL - - - - - - - -
51256-FP - - - - - - - -
3206-B-TNH-C3 - - - - - - - -
NJ320-E-M1-F1-C4 - - - - 20 - - -
23092-B-K-MB-C3 - - - - - - - -
HC6218-2RSR-C3 - - - - - - - -
51152-MP - 125 - - - - - -
7410-B-MP - - - - - - - -
NJ2234-E-M1 - - - - - - - -
6222-Z-C4 - - - - - - - -
6320-NR - - - - - - - -
3320-M-C4 - - - - 20 - - -
NJ348-E-M1-C3 - - - - 15 mm - 16 mm38 mm
HS7002-E-T-P4S-UL - - - - - - - -
22212-E1A-K-M-C3 - 160 - - 75 - - -
B7220-C-T-P4S-UM - - 216 mm30.2 mm68.26 mmM10x1 - -
6011-N - - - 18.8 mm34.92 mm - 12.5 mm -
23044-K-MB-C3 - - - - - - - -
NU322-E-M1-F1-T51F - - - - - - - -
HC6205-2Z-C3-L237 - - - - 30 - - -
16014-P5 - - - 17.4 mm - - - -
6219-Z-NR - - - - - - - -
6203-TB-C3 - - 70 mm - 25 mm - - -
B7036-E-T-P4S-UL - - - - - - - -
NUP204-E-TVP2 - - - - 30 mm - - -
6000-C-C4 - - 146 mm21.4 mm - - - -
61944-MA-C3 - - - - - - - -
6307-Z-N - - - - - - - -
20240-MB - - - - - - - -
HSS7004-C-T-P4S-DUL - - - - 20 mm - - -
6004-2RSR-L038-C4 - - - - - - - -
7304-B-TVP-P6-UO - 35 mm - - 17 mm - - -
6313-M-C4 - - - 30.9 mm - M6x1 - -
7222-B-MP-P5-UA - - 95 mm - - - - 30 mm
B71902-C-T-P4S-DUL - - - - - - - -
6006-2Z-TVH-C3 - - - - 35 - - -
3202-B-2RSR-TVH - - - - - - - -
21305-E1-TVPB - - - 11 mm - - 25 mm60 mm
23076-E1A-MB1-T52BW - 40 - - - - - -
62304-A-2RSR-C3 - - - - - M6x1 - 31 mm
NJ2220-E-M1A-C3 - - - - - - 62.5 mm -
2220-M - - - 14.9 mm61.91 mm - - -
N215-E-M1-C3 - 68 - - - - - -
239/670-B-K-MB-C3 - - - - 30 - - -
51240-MP - 290 - - - - - -
3314-BD - - - 12 mm50.8 mmM6x1 - 35 mm
511/630-FP - - - - - - - 50 mm
22316-E1A-M-C4 - - - - - - - -
6016-TB-P6 - - - - 10 - - -
N321-E-M1 - 68 - - 40 - - -
B7030-E-T-P4S-UL - 35 - - - - - -
6200-C-2HRS-C3 - - - 19.8 mm - M6x1 - 44 mm
231/500-E1A-K-MB1 - - - - - - - -
23028-E1A-K-M-C4 - - - - - - - -
61803-2RSR23.81 mm69.85 mm - - 33.34 mm - - -
lm48500la - - - - - - - -
QUOTE

SKF / FAG Pendular roller bearings, DIN 635 - Landefeld

Pendular roller bearings, DIN 635 (47 various items) - Order before 21:00, same day dispatch
QUOTE

FAG 635 bearings - Nodes bearing

Nodes bearings have FAG 635 bearings in stock, single row deep groove ball bearings, 635 bearings dimensions: 5mm x 19mm x 6mm, Cr: 2600N, C0r: 1050N
QUOTE

FAG 635 Bearing | Model：635 - Cylindrical roller bearings

❀❀❀FAG bearings 635 bearing 635 deep groove ball bearings ,635 Bearings,FAG Bearings 635 Size -ID*OD*thickness:5(mm)*19(mm)*6(mm),FAG 635 Any 
QUOTE

Single Row Rigid Ball Bearing Ref. Fag 635 - Rodavigo

FAG 635. Single row rigid ball bearing. Radial ball bearings are composed of an inner ring and an outer ring, plus a cage with a precision ball set.Ball bearing is 
QUOTE

635Y FAG • SP

635Y FAG Bearings. FAG · Deep groove ball bearings · 635Y. ‹ › ‹ › FAG 635Y. 5x19x6 mm. $6.06 2 pcs. with 2 to 5 days delivery to United States. Specifications 
QUOTE

Bearing 635 (FAG) | Size and Specification | Bearings Online

Deep groove ball bearings 635. Bearing number : 635. Size (mm) : 5x19x6. Brand : FAG. Bore Diameter (mm) : 5. Outer Diameter (mm) : 19. Width (mm) : 6
QUOTE

635 FAG • ABF Store

Product properties. Availability 249 pcs; Brand FAG; Item Number 635 FAG; Also known as 4012801206174; Category Deep Groove Ball Bearings Single Row 
QUOTE

FAG 635 Bearing - GBS Bearing

FAG 635-C3|635-C3 FAG bearings Central African Republic|FAG 635-C3bearing is our best at producing bearing. Our most advanced production and testing 
QUOTE

Fag 635-2Z Single Row Ball Bearing: Precision Balls: Amazon

Part Number, 635-2Z. UPC, 751570016709. Bore Diameter, 5.00 millimeters. Brand Name, FAG. EAN, 0751570016709. Inside Diameter, 5 millimeters
QUOTE

FAG 635 | Bearing Model:635 - Ball Bearings

FAG 635-Z Bearings - Wu Xi FAJ bearing ☽☽. ☾☾ Right now,FAG 635-Z bearing have a wide range of applications,our company always provide best quality, 
QUOTE

635 -2Z FAG • SP

Buy 635 -2Z manufactured by FAG. Inner Diameter: 5, Outer Diameter: 19, Width: 6, Weight: 8. a.k.a. 35-FF (MARLIN-ROCKWELL CORP.),35KDD (FAFNIR) 
QUOTE

FAG 635-2Z Deep groove ball bearing 635-2Z 5x19x6mm

FAG 635-2Z Deep groove ball bearing 635-2Z Double Metal Seals,Steel cage,single row,Origin: Germany Dimension:5x19x6mm weight: 0029kg
QUOTE

FAG 635-Z bearing 5x19x6 60035 | Deep Groove Ball

Enquiry FAG 635-Z Deep Groove Ball Bearings from bearingforworld, 60035 demensions: 5x19x6 Bearings Online

Contact Us

Bearing Argentina
AddressViamonte 1145-Piso 11-1053 Buenos Aires, Argentina
Phone(Working Time)372-5623
Fax
  • Bearing Argentina
    • Quick question Quick question I'm very interested in your products; could you send me some detail reference information? Please send me detail product specification, thank you! May I be an agency of your products,and what's yourterms? We intend to purchase this product, would you please send me the quotation and minimum order quantity?
     This feature is Quick question function, select the corresponding question types, automatically enter the corresponding problem, remove your trouble of typing
Send Now

Related News

70x125x39.7 bearing number and size chart pdf
5214-ZZ double row ball bearing 70x125x39.7 shielded5214-ZZ angular contact ball bearing 70x125x39.7 in stock at your online bearing store, bearings direct 5214LLU Angular Contact Sealed 70x125x39.7 Bearing5214LLU Angular Contact Ball BearingOne...
70x125x41 bearing size chart mm
33214U NTN Bearing | 33214U bearings | 70x125x41.0mm - NodesNTN roller bearings - SKF NTN FAG NSK TIMKEN KOYO . The stock is always changing , all of items can not be listed ,please send us E-mail for inquiry  Tapered roller bearing...
260x480x130 bearing table
FAG 22252BK.MB+H3152X Bearing 260x480x130 SphericalPart Number 22252BK.MB+H3152X Spherical Roller Bearings (FAG) Old Code bearing Dimensions (mm) Inside diameter ID d 260 Outside diameter OD D 480  NSK NU2252 Bearing 260x480x130 Cylindrical...

Product Categories

  • Vickers Piston Pump PV Series
  • FAG Bearing
  • NSK Bearing
  • NTN Bearing
  • SKF Bearing
  • Timken Bearing
  • AMI Bearing
  • BOSTON GEAR BEARING
  • BROWNING BEARING
  • CONSOLIDATED BEARING
  • COOPER BEARING
  • DODGE Bearing
  • EBC BEARING
  • GARLOCK Bearing
  • GENERAL BEARING
  • HUB CITY BEARING
  • IPTCI Bearing
  • ISOSTATIC Bearing
  • REXROTH Check valves
  • REXROTH Pressure relief valve
  • REXROTH Pressure reducing valve
  • REXROTH Throttle valves
  • REXROTH Throttle check valve
  • REXROTH HY-CHECK VALVE
  • REXROTH Directional poppet valves
  • REXROTH Twin throttle check valve
  • REXROTH Throttle check valves
  • REXROTH Directional spool valves
  • REXROTH Valves
More

New Products

  • Timken lm48500la Bearing
  • 17 mm x 26 mm x 5 mm FAG 61803-2RSR Single Row Ball Bearings
  • 500 mm x 830 mm x 264 mm FAG 231/500-E1A-K-MB1 Roller Bearings
  • FAG 51240-MP Thrust Ball Bearing
  • 100 mm x 180 mm x 46 mm FAG 2220-M Self Aligning Ball Bearings

Top Products

HUB CITY FB260UR X 1-3/8 Flange Block Bearings BOSTON GEAR M1520-22 Sleeve Bearings NTN TMB316ZC3 Single Row Ball Bearings
Vickers PV028R1K1T1NGCC4545 Piston Pump PV Series Timken lm48500la Bearing
  • About Us|
  • Contact Us|
  • Site Map
  • Sitemaps

Bearing Argentina. Copyright © 2017 - 2020 All Rights Reserved.

  • Home
  • Product Categories
    • Vickers Piston Pump PV Series
    • FAG Bearing
    • NSK Bearing
    • NTN Bearing
    • SKF Bearing
    • Timken Bearing
    • AMI Bearing
    • BOSTON GEAR BEARING
    • BROWNING BEARING
    • CONSOLIDATED BEARING
    • COOPER BEARING
    • DODGE Bearing
    • EBC BEARING
    • GARLOCK Bearing
    • GENERAL BEARING
    • HUB CITY BEARING
    • IPTCI Bearing
    • ISOSTATIC Bearing
    • REXROTH Check valves
    • REXROTH Pressure relief valve
    • REXROTH Pressure reducing valve
    • REXROTH Throttle valves
    • REXROTH Throttle check valve
    • REXROTH HY-CHECK VALVE
    • REXROTH Directional poppet valves
    • REXROTH Twin throttle check valve
    • REXROTH Throttle check valves
    • REXROTH Directional spool valves
    • REXROTH Valves
  • Company Profile
    • Company Introduction
  • Technical Articles
  • Contact Us