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FIT7868RR — WASHER,KEYWAY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

FIT7868RR: WASHER,KEYWAY.

The WASHER,KEYWAY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 631 OVERALL, hole_diameter: 0.197 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN, outside_diameter: 0.310 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN, style_designator: KEY, surface_treatment: PASSIVATE OVERALL, material_thickness: 0.015 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-502-7531, 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
FIT7868RR
NSN: 5310-01-502-7531
FSC: 5310 — Nuts and Washers
CAGE: 58998 — FASTENER INNOVATION TECHNOLOGY, INC. DBA F I T (USA)
SPECIFICATIONS
materialSTEEL COMP 631 OVERALL
hole_diameter0.197 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
outside_diameter0.310 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
style_designatorKEY
surface_treatmentPASSIVATE OVERALL
material_thickness0.015 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
internal_key_quantity2
end_item_identificationC-17A AIRCRAFT A
internal_straight_key_width0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-25043 MIL SPEC SINGLE MATERIAL RESPONSE OR AMS5528 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5529 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationAMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
distance_from_centerline_to_top_of_internal_key0.053 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
NSN5310-01-502-7531
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: FIT7868RR · 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
•
INTERNAL STRAIGHT KEY WIDTH: 0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.053 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-25043 MIL SPEC SINGLE MATERIAL RESPONSE OR AMS5528 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5529 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.310 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.015 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
INTERNAL STRAIGHT KEY WIDTH0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.053 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-25043 MIL SPEC SINGLE MATERIAL RESPONSE OR AMS5528 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5529 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.310 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
MATERIAL THICKNESS0.015 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
END ITEM IDENTIFICATIONC-17A AIRCRAFT A
MATERIALSTEEL COMP 631 OVERALL
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
3D0325-3RSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is FIT7868RR?
FIT7868RR is a WASHER,KEYWAY.
What parts can replace FIT7868RR?
There is 1 known substitute for FIT7868RR: 3D0325-3R. Substitute compatibility should be verified for your specific system.
What is the NSN for FIT7868RR?
FIT7868RR is cataloged in the U.S. Government catalog under NSN 5310-01-502-7531. 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.