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WA522 — WASHER,KEYWAY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

WA522: WASHER,KEYWAY.

The WASHER,KEYWAY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_style: VERTEX BELOW CENTER, ring_style: STRAIGHT GAP, usage_design: EXTERNAL, hole_diameter: 0.440 INCHES MINIMUM AND 0.443 INCHES MAXIMUM IN, inside_diameter: 0.509 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-169-8023, 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
WA522
NSN: 5325-00-169-8023
NIINs: 001698023, 002905766
FSC: 5325 — Fastening Devices
CAGE: 20859 — MELLOWES CO DIV OF CHARTER MFG CO INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleVERTEX BELOW CENTER
ring_styleSTRAIGHT GAP
usage_designEXTERNAL
hole_diameter0.440 INCHES MINIMUM AND 0.443 INCHES MAXIMUM IN
inside_diameter0.509 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN
major_thickness0.059 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
outside_diameter1.416 INCHES MINIMUM AND 1.426 INCHES MAXIMUM IN
special_features0.047 IN. BY 0.188 IN. LG SLOT 0.047 IN. FROM END OF WASHER ON TOP OF KEYWAY IN
surface_treatmentCADMIUM OVERALL
material_thickness0.020 INCHES NOMINAL IN
internal_keyway_width0.096 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
NSN5325-00-169-8023
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: WA522 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
USAGE DESIGN: EXTERNAL
•
END STYLE: VERTEX BELOW CENTER
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OUTSIDE DIAMETER: 0.759 INCHES MINIMUM AND 0.775 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.059 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.509 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: STRAIGHT GAP
TECHNICAL CHARACTERISTICS
USAGE DESIGNEXTERNAL
END STYLEVERTEX BELOW CENTER
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER0.759 INCHES MINIMUM AND 0.775 INCHES MAXIMUM IN
MAJOR THICKNESS0.059 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
INSIDE DIAMETER0.509 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESTRAIGHT GAP
SURFACE TREATMENTZINC AND CHROMATE
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 8
5192135Reference document
Same NSN cross-reference
Reference document — Secondary reference
CL7106Reference document
Same NSN cross-reference
Reference document — Secondary reference
M1975Reference document
Same NSN cross-reference
Reference document — Secondary reference
271987R1Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS3211-7-CRSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MS3211-7-SZSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is WA522?
WA522 is a WASHER,KEYWAY.
What parts can replace WA522?
There are 8 known substitutes for WA522: 5192135, CL7106, M1975 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for WA522?
WA522 is cataloged in the U.S. Government catalog under NSN 5325-00-169-8023. This indicates validated use in U.S. government and defense supply chains.
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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.