Pump Shaft Quality (PSQ)

In the stainless and nickel industries, Pump Shaft Quality (PSQ) indicates turned, ground and polished shafting used in the rotating industries. The tight diametrical tolerance achieved through grinding decreases wear and gives a more constant product with controlled properties. Our inventory consists of diametrically oversized material in 20’ to 24’ random lengths, allowing NSA to meet very specific customer requests for nonstandard PSQ requirements on an expedited basis.

NSA’s stock meets or exceeds industry standards

NSA’s Stocking PSQ Sizes
3/4” 13/16” 7/8” 1” 1-1/8” 1-3/16” 1-1/4” 1-3/8” 1-7/16”
1-1/2” 1-5/8” 1-11/16” 1-3/4” 1-15/16” 2” 2-3/16” 2-1/4” 2-7/16”
2-1/2” 2-11/16” 2-15/16” 3” 3-3/16” 3-1/4” 3-7/16” 3-1/2” 3-11/16”
3-3/4” 3-15/16” 4” 4-1/4” 4-1/2” 5” 5-1/4” 5-1/2” 6”
NSA’s Stocking PSQ Grades
UNS N05500 / Nickel Alloy 500
UNS N08020 / Alloy 20
UNS S17400 / 17-4 H1150
UNS S20910 / XM-19 High Strength
UNS S30300 / 303 BQ
UNS S30400 / 304 BQ
UNS S31600 / 316
UNS S41000 / 410
UNS S41600 / 416 Heat Treat

Custom shafts 3/4” RD to 14” RD, with specified length,
finish & grade available upon request.

Custom Grades

Custom grades are available for most stainless and nickel alloy applications.

Custom Sizes

Custom sizes can be produced in standard or metric dimensions with specific tolerances including ovality and straightness per our customers requirements.

Custom Lengths

Although standard shafts are 20’ random lengths, NSA has oversized bar stock in shafting grades up to 24’ or loner that can be processed to meet our customers requirements.

Custom Finishes

The industry standard finish for PSQ is 32 RMS (Root Mean Square). We order PSQ at the industry standard and can supply up to an 8 RMS or better to offer our customers a superior product based on their specifications.


NSA has special boxing for PSQ material to ensure the protection of the finish and straightness of material during transportation and handling.

NSA’s PSQ Advantage

Here at NSA we are selective with our “value added processors”. We interact daily with them and they know exactly what we expect in terms of finished product and delivery time.

The information above is not warranted, guaranteed, or for design purposes.

The information above is not warranted, guaranteed, or for design purposes.

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