About 10,000 types of vacuum components in stock at all times.Business Hours： 9:00-18:00, excluding weekends and holidays

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  • Feedthrough Feedthrough
    Feedthrough
  • Isolator Isolator
    Isolator
  • Viewport Viewport
    Viewport
  • Vacuum Component Vacuum Component
    Vacuum Component
  • Vacuum Valve Vacuum Valve
    Vacuum Valve
  • Motion Feedthroughs Motion Feedthroughs
    Motion Feedthroughs
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Contact Us
Shipping accepted on the day on orders until 17:00
(Hours 9:00 to 18:00 except Saturdays, Sundays, and holidays)
  1. Cosmotec for Vacuum Components
  2. Viewport
  3. Borosilicate
  4. viewport borosilicate glass
  1. Cosmotec for Vacuum Components
  2. Vacuum Component
  3. JIS VF / VG standards
  4. Viewport
  5. viewport borosilicate glass
  1. Cosmotec for Vacuum Components
  2. Vacuum Component
  3. NW / KF standard
  4. Viewport
  5. viewport borosilicate glass
  1. Cosmotec for Vacuum Components
  2. Vacuum Component
  3. ICF standards
  4. Viewport
  5. viewport borosilicate glass

viewport borosilicate glass

viewport borosilicate glass

▼Viewport Borosilicate Glass (Kovar®)
Borosilicate glass/Duran®: for visual inspection inside the chamber
Materials such as quartz and sapphire are available for optical use

▼ The following types are standardized
Flanges: NW/KF, ICF, JIS-VF, JIS-VG, CeFiX®, Sanitary
Window materials are Borosilicate glass, Borosilicate glass Sapphire (Al2O3),.
Fused silica (SiO2),.
Synthetic Quartz ( SiO2),.
Magnesium Fluoride (MgF2),.
Calcium Fluoride (CaF2),
Barium Fluoride(BaF2)
Germanium (Ge),.
Zinc Selenide (ZnSe),.
lead glass as standard products.
Non-magnetic flanges (titanium, SUS316L) are also available.
Viewports that can be opened and closed (list) is also available.

▼Options (ICF flange only)
Viewport cover (List)
Viewport Shutter(List)

▼Custom-made products are also available.
We can change the window material and flange size. AR coating is also available. Please contact us by clicking the "Inquiry" button on the right side of the page.
※When requesting AR coating, please let us know the wavelength used, and if laser resistance is required, please let us know the details of the laser to be used.

see next
Basic Information
Flange material SUS 304
window Borosilicate glass
Maximum temperature 350℃
Leak rate <1.0x10-8Pa･㎥/sec
RoHS2 corresponding Compliant
Inquiry for this subcategory

We have 42 type candidate

※ Please click on the product code or model for more information.

front.product.product_code
Model
 NW/KF ICF VF VG ISO-K A T (glass thickness) V (effective diameter) H1 H2 G1 G2 Hole diameter(depth) Number of holes O-ring standard
Stock & Delivery
front.product.price
front.product.tax_included2
20145
NW16VPK
16 - - - - 30 1.6 16 12.7 - - - - - -
stock
9 1-2 Business Days
waiting for completion
15 Arrival on May 24,2027
When out of stock
Answered later
31,100JPY (with tax 34,210JPY)
20197
NW25VPK
25 - - - - 40 1.6 16 12.7 - - - - - -
stock
5 1-2 Business Days
waiting for completion
15 Arrival on Dec 08,2026
When out of stock
Answered later
32,100JPY (with tax 35,310JPY)
20232
NW40VPK
40 - - - - 55 3 32 12.7 - - - - - -
stock
15 1-2 Business Days
waiting for completion
10 Arrival on Nov 26,2026
When out of stock
Answered later
33,100JPY (with tax 36,410JPY)
20255
NW50VPK
50 - - - - 75 3 32 12.7 - - - - - -
stock
35 1-2 Business Days
When out of stock
Answered later
34,100JPY (with tax 37,510JPY)
20066
ICF34VPK
- 34 - - - 34 1 16 12 - - - φ4.5 6 -
waiting for completion
66 Arrival on Mar 02,2027
When out of stock
Answered later
31,900JPY (with tax 35,090JPY)
25575
ZICF34VPK
- 34 - - - 34 1 15 12 - - - φ4.4 6 -
stock
10 1-2 Business Days
When out of stock
Answered later
31,900JPY (with tax 35,090JPY)
20104
ICF70VPK
- 70 - - - 70 2.5 38 12.7 - - - φ6.8 6 -
stock
57 1-2 Business Days
waiting for completion
45 Arrival on Jan 28,2027
When out of stock
Answered later
37,100JPY (with tax 40,810JPY)
20017
ICF114VPK
- 114 - - - 113.5 3 62.8 17.5 - - - φ8.4 8 -
stock
26 1-2 Business Days
waiting for completion
10 Arrival on Dec 25,2026
When out of stock
Answered later
47,100JPY (with tax 51,810JPY)
20031
ICF152VPK
- 152 - - - 150 6 90 20 - - - φ8.5 16 -
stock
53 1-2 Business Days
When out of stock
Answered later
99,100JPY (with tax 109,010JPY)
20440
ICF203VPK
- 203 - - - 202.4 8 136 22.6 - - - φ8.5 20 -
stock
19 1-2 Business Days
When out of stock
Answered later
159,100JPY (with tax 175,010JPY)
20731
ICF253VPK
- 253 - - - 253 8 136 24.6 - - - φ8.5 24 -
stock
2 1-2 Business Days
When out of stock
Answered later
252,100JPY (with tax 277,310JPY)
21279
VF10VPK
- - 10 - - 70 1.7 15.7 8 - - - φ10 4 V24
stock
5 1-2 Business Days
When out of stock
Answered later
61,000JPY (with tax 67,100JPY)
21280
VF20VPK
- - 20 - - 80 1.7 15.7 8 - - - φ10 4 V34
When out of stock
Answered later
78,900JPY (with tax 86,790JPY)
21281
VF25VPK
- - 25 - - 90 2.8 37 16 8 - - φ10 4 V40
stock
4 1-2 Business Days
When out of stock
Answered later
81,600JPY (with tax 89,760JPY)
21282
VF40VPK
- - 40 - - 105 2.8 37 10.5 10 - - φ10 4 V55
When out of stock
Answered later
82,200JPY (with tax 90,420JPY)
21283
VF50VPK
- - 50 - - 120 3 65 20 10 - - φ10 4 V70
stock
1 1-2 Business Days
When out of stock
Answered later
155,900JPY (with tax 171,490JPY)
21284
VF65VPK
- - 65 - - 145 3 65 15.5 10 - - φ12 4 V85
stock
1 1-2 Business Days
When out of stock
Answered later
170,200JPY (with tax 187,220JPY)
21285
VF80VPK
- - 80 - - 160 3 65 15.5 12 - - φ12 4 V100
stock
3 1-2 Business Days
When out of stock
Answered later
172,900JPY (with tax 190,190JPY)
21286
VF100VPK
- - 100 - - 185 6 91 17.5 12 - - φ12 8 V120
stock
1 1-2 Business Days
When out of stock
Answered later
197,100JPY (with tax 216,810JPY)
21287
VF125VPK
- - 125 - - 210 6 91 17.5 12 - - φ12 8 V150
stock
2 1-2 Business Days
When out of stock
Answered later
197,700JPY (with tax 217,470JPY)
21288
VF150VPK
- - 150 - - 235 8 136 17.4 12 - - φ12 8 V175
stock
7 1-2 Business Days
When out of stock
Answered later
320,300JPY (with tax 352,330JPY)
21289
VF200VPK
- - 200 - - 300 8 136 17.4 16 - - φ15 8 V225
stock
2 1-2 Business Days
When out of stock
Answered later
323,600JPY (with tax 355,960JPY)
21290
VF250VPK
- - 250 - - 350 8 136 17.4 16 - - φ15 12 V275
When out of stock
Answered later
326,900JPY (with tax 359,590JPY)
21291
VF300VPK
- - 300 - - 400 8 136 17.4 16 - - φ15 12 V325
When out of stock
Answered later
375,300JPY (with tax 412,830JPY)
21266
VG10VPK
- - - 10 - 70 1.7 15.7 8 - 34 24 φ10 4 V24
stock
2 1-2 Business Days
When out of stock
Answered later
61,000JPY (with tax 67,100JPY)
21267
VG20VPK
- - - 20 - 80 1.7 15.7 8 - 44 34 φ10 4 V34
stock
3 1-2 Business Days
When out of stock
Answered later
78,900JPY (with tax 86,790JPY)
21268
VG25VPK
- - - 25 - 90 2.8 37 16 8 50 40 φ10 4 V40
stock
8 1-2 Business Days
When out of stock
Answered later
81,600JPY (with tax 89,760JPY)
21269
VG40VPK
- - - 40 - 105 2.8 37 10.5 10 65 55 φ10 4 V55
stock
3 1-2 Business Days
When out of stock
Answered later
82,200JPY (with tax 90,420JPY)
21270
VG50VPK
- - - 50 - 120 3 65 20 10 80 70 φ10 4 V70
stock
1 1-2 Business Days
When out of stock
Answered later
155,900JPY (with tax 171,490JPY)
21271
VG65VPK
- - - 65 - 145 3 65 15.5 10 95 85 φ12 4 V85
stock
1 1-2 Business Days
When out of stock
Answered later
170,200JPY (with tax 187,220JPY)
21272
VG80VPK
- - - 80 - 160 3 65 15.5 12 110 100 φ12 4 V100
stock
4 1-2 Business Days
When out of stock
Answered later
172,900JPY (with tax 190,190JPY)
21273
VG100VPK
- - - 100 - 185 6 91 17.5 12 130 120 φ12 8 V120
stock
5 1-2 Business Days
When out of stock
Answered later
197,100JPY (with tax 216,810JPY)
28058
ZVG100VPK
- - - 100 - 185 6 91 17.5 12 130 120 - - V120
stock
1 1-2 Business Days
When out of stock
Answered later
99,800JPY (with tax 109,780JPY)
21274
VG125VPK
- - - 125 - 210 6 91 17.5 12 160 150 φ12 8 V150
stock
3 1-2 Business Days
When out of stock
Answered later
197,700JPY (with tax 217,470JPY)
21275
VG150VPK
- - - 150 - 235 8 136 17.4 12 185 175 φ12 8 V175
stock
2 1-2 Business Days
When out of stock
15 Business Days
291,100JPY (with tax 320,210JPY)
21276
VG200VPK
- - - 200 - 300 8 136 17.4 16 241 225 φ15 8 V225
stock
2 1-2 Business Days
When out of stock
Answered later
323,600JPY (with tax 355,960JPY)
21277
VG250VPK
- - - 250 - 350 8 136 17.4 16 291 275 φ15 12 V275
When out of stock
Answered later
326,900JPY (with tax 359,590JPY)
21278
VG300VPK
- - - 300 - 400 8 136 17.4 16 341 325 φ15 12 V325
When out of stock
Answered later
375,300JPY (with tax 412,830JPY)
22900
ISOK63VPK
- - - - 63 95 3.5 49 14 12 70 57.2 - - -
stock
2 1-2 Business Days
When out of stock
Answered later
64,100JPY (with tax 70,510JPY)
22901
ISOK80VPK
- - - - 80 110 3.5 49 14 12 83 69.9 - - -
stock
2 1-2 Business Days
When out of stock
Answered later
99,700JPY (with tax 109,670JPY)
22902
ISOK100VPK
- - - - 100 130 3.5 63 12 12 102.7 88.9 - - -
stock
2 1-2 Business Days
When out of stock
Answered later
107,100JPY (with tax 117,810JPY)
22903
ISOK160VPK
- - - - 160 180.1 6 90 18 12 153 139.7 - - -
stock
3 1-2 Business Days
When out of stock
Answered later
155,700JPY (with tax 171,270JPY)
NW/KF ICF VF VG ISO-K A T (glass thickness) V (effective diameter) H1 H2 G1 G2 Hole diameter(depth) Number of holes O-ring standard
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Shipping accepted on the day on orders until 17:00 Hours 9:00 to 18:00 except Saturdays, Sundays, and holidays
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