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XM60445 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

XM60445: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1035 OR STEEL COMP 1045 OR STEEL COMP 1050 OVERALL, hole_diameter: 1.980 INCHES MINIMUM AND 1.990 INCHES MAXIMUM IN, heat_treatment: QUENCHED AND TEMPERED, surface_finish: 63.0 MICROINCHES TOP, hardness_rating: 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM, outside_diameter: 2.990 INCHES MINIMUM AND 3.030 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-066-3928, 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
XM60445
NSN: 5310-01-066-3928
FSC: 5310 — Nuts and Washers
CAGE: 12204 — CHRYSLER REALTY COMPANY LLC DBA DAIMLER CHRYSLER (USA)
SPECIFICATIONS
materialSTEEL COMP 1035 OR STEEL COMP 1045 OR STEEL COMP 1050 OVERALL
hole_diameter1.980 INCHES MINIMUM AND 1.990 INCHES MAXIMUM IN
heat_treatmentQUENCHED AND TEMPERED
surface_finish63.0 MICROINCHES TOP
hardness_rating35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
outside_diameter2.990 INCHES MINIMUM AND 3.030 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
internal_key_quantity1
internal_straight_key_width0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-700 FED SPEC ALL MATERIAL RESPONSES OVERALL
distance_from_centerline_to_top_of_internal_key0.830 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN
NSN5310-01-066-3928
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: XM60445 · 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
•
SURFACE FINISH: 63.0 MICROINCHES BOTTOM
•
INTERNAL STRAIGHT KEY WIDTH: 0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.830 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN
•
HEAT TREATMENT: QUENCHED AND TEMPERED
•
HARDNESS RATING: 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-700 FED SPEC ALL MATERIAL RESPONSES OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH63.0 MICROINCHES BOTTOM
SURFACE FINISH63.0 MICROINCHES TOP
INTERNAL STRAIGHT KEY WIDTH0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.830 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN
HEAT TREATMENTQUENCHED AND TEMPERED
HARDNESS RATING35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-700 FED SPEC ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER2.990 INCHES MINIMUM AND 3.030 INCHES MAXIMUM IN
MATERIAL THICKNESS0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM 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
5310010663928Reference document
Same NSN cross-reference
Reference document — Informative 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 XM60445?
XM60445 is a WASHER,KEY.
What parts can replace XM60445?
There is 1 known substitute for XM60445: 5310010663928. Substitute compatibility should be verified for your specific system.
What is the NSN for XM60445?
XM60445 is cataloged in the U.S. Government catalog under NSN 5310-01-066-3928. 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.