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900305-5 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

900305-5: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include hole_diameter: 0.636 INCHES NOMINAL IN, style_designator: SPLIT, surface_treatment: ZINC OVERALL, material_thickness: 0.189 INCHES NOMINAL IN, end_item_identification: FAN CENTRIFUGAL, part_name_assigned_by_controlling_agency: SPRING LOCKWASHER. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-599-3965, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
900305-5
NSN: 5310-01-599-3965
FSC: 5310 — Nuts and Washers
CAGE: 75477 — FM AF, LLC DBA AMERICAN FAN COMPANY (USA)
SPECIFICATIONS
hole_diameter0.636 INCHES NOMINAL IN
style_designatorSPLIT
surface_treatmentZINC OVERALL
material_thickness0.189 INCHES NOMINAL IN
end_item_identificationFAN CENTRIFUGAL
part_name_assigned_by_controlling_agencySPRING LOCKWASHER
NSN5310-01-599-3965
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 900305-5 · OEM ⚠ 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
•
STYLE DESIGNATOR: SPLIT
•
MATERIAL THICKNESS: 0.189 INCHES NOMINAL IN
•
SURFACE TREATMENT: ZINC OVERALL
•
HOLE DIAMETER: 0.636 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSPLIT
MATERIAL THICKNESS0.189 INCHES NOMINAL IN
SURFACE TREATMENTZINC OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYSPRING LOCKWASHER
END ITEM IDENTIFICATIONFAN CENTRIFUGAL
HOLE DIAMETER0.636 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
R1-8175 PC NO 62Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 900305-5?
900305-5 is a WASHER,SPRING TENSION.
What parts can replace 900305-5?
There is 1 known substitute for 900305-5: R1-8175 PC NO 62. Substitute compatibility should be verified for your specific system.
What is the NSN for 900305-5?
900305-5 is cataloged in the U.S. Government catalog under NSN 5310-01-599-3965. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.