NW Viewports, Adapter Welch Pump, Nail Clamp

Viewports Zero length

Zero length 7056 glass
Standard ISO flange interface

Viewports Zero length

PART NUMBER	ISO	A	B
VP-75-NW16	NW 16	.62	.38
VP-100-NW25	NW 25	.62	.38
VP-150-NW40	NW 40	1.40	.55
VP-200-NW50	NW 50	1.40	.55

Adapter Welch Pump

Includes aluminum gasket
Stainless steel type 304

Adapter Welch Pump

PART NUMBER	ISO	WELCH PUMP	A	B
KSFT-1399	NW 16	1399, 1400, 1410	1.77	.46
KSFT-1405	NW 16	1405	2.56	.56
KSFT-1402	NW 25	1380, 8806, 1402, 8811, 1403, 8816, 8821	2.76	.75
KSFT-1376	NW 40	1373, 8831, 1376	2.56	1.12
KSFT-1397	NW 40	1374, 8851, 1397	2.56	1.43

Nail Clamps

Clamp material = Aluminum
Used to attach standard NW flanges directly to chamber

Nail Clamps

PART NUMBER	ISO	BOLT SIZE	A	QUANTITY
NC-10	NW 10	M6 x 20	1.693	3
NC-16	NW 16	M6 x 20	1.693	3
NC-25	NW 25	M6 x 20	2.086	4
NC-40	NW 40	M6 x 20	2.677	4
NC-50	NW 50	M6 x 20	3.465	6

Product information is subject to change without notice. Product images may include options or accessories not included with the base model.

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For 50 years, Key High Vacuum Products, Inc. has been a trusted leader in precision-engineered stainless steel high vacuum weldments. With tens of thousands of unique weldments in use—from particle accelerators to industrial leak detectors—our expertise is proven across industries. Rooted in innovation, craftsmanship, and an unwavering commitment to customer satisfaction, we deliver high-quality, customized solutions that drive success. Every day, our team brings a unique blend of passion and precision, ensuring your goals are met with excellence—because your mission matters. Experience the Key High difference.

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