PartsTable
Technical Data Sheet
28303 ✓ Verified by PartsTable
Dataflex · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The Powerbar, a high-end, three-socket power strip for professional use. The integrated GST18/3 connectors allow units to be clipped together or interlinked by GST-cables to your on-desk Power products. The Powerbar is constructed with a fire-retardant polycarbonate and aluminium housing.

Mount the Powerbar underneath desks in cable trays or on panels to manage office power needs safely and discreetly. The Powerbar complies with all relevant regulations and safety standards, including those in the EU. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-107-1603, indicating validated use in U.S.

government and defense logistics supply chains.

WHERE IT FITS
28303
NSN: 5310-00-107-1603
FSC: 5310
CAGE: 64104 — DRESSER, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width1.5625 INCHES NOMINAL IN
bore_diameter1.4375 INCHES NOMINAL IN
overall_width2.1875 INCHES NOMINAL IN
standout_width0.3125 INCHES NOMINAL IN
special_featuresOPERATING TEMPERATURE NOT TO EXCEED 121 DEG C/250 DEG F; OIL HOLE AND GROOVE IN CUP; 0.0040 IN. MIN,0.0060 IN. MAX BENCH LATERAL IN
style_designatorSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES, STEEP ANGLE
cone_corner_radius0.0310 INCHES NOMINAL IN
backface_corner_radius0.0620 INCHES NOMINAL IN
overall_outside_diameter3.6250 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 4
reference_number_differentiating_characteristicsMAGNETIC PERMEABILITY SHALL BE LESS THAN 1.2 BEFORE FABRICATIONAND NOT GREATER THAN 2.0 AFTER FABRICATION AS MEASURED IN A 200 OERSTEDFIELD
NSN5310-00-107-1603
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 28303 · Dataflex ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MAGNETIC PERMEABILITY SHALL BE LESS THAN 1.2 BEFORE FABRICATIONAND NOT GREATER THAN 2.0 AFTER FABRICATION AS MEASURED IN A 200 OERSTEDFIELD
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMAGNETIC PERMEABILITY SHALL BE LESS THAN 1.2 BEFORE FABRICATIONAND NOT GREATER THAN 2.0 AFTER FABRICATION AS MEASURED IN A 200 OERSTEDFIELD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
NA44143-44363DInterchangeable
interchangeable cross-reference
interchangeable
MS19089-10Interchangeable
interchangeable cross-reference
interchangeable
28303Interchangeable
interchangeable cross-reference
interchangeable
50FK-1614Interchangeable
interchangeable cross-reference
interchangeable
50K-1614Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28303?
28303 is a BEARING,ROLLER,TAPERED manufactured by Dataflex.
What parts can replace 28303?
There are 5 known substitutes for 28303: NA44143-44363D, MS19089-10, 28303 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 28303?
28303 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-107-1603. This indicates validated use in U.S. government and defense supply chains.
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