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74A450660-2001 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

74A450660-2001: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP XM-13 OVERALL, hole_diameter: 1.255 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN, hardness_rating: 43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM, outside_diameter: 1.750 INCHES MINIMUM AND 1.780 INCHES MAXIMUM IN, style_designator: KEY, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-108-7519, 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
74A450660-2001
NSN: 5310-01-108-7519
FSC: 5310 — Nuts and Washers
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP XM-13 OVERALL
hole_diameter1.255 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN
hardness_rating43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM
outside_diameter1.750 INCHES MINIMUM AND 1.780 INCHES MAXIMUM IN
style_designatorKEY
surface_treatmentPASSIVATE OVERALL
material_thickness0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
internal_key_quantity2
internal_straight_key_width0.156 INCHES NOMINAL IN
material_document_and_classificationAMS 5629,COND H ASSN STD SINGLE MATERIAL RESPONSE OVERALL
distance_from_centerline_to_top_of_internal_key0.500 INCHES NOMINAL IN
NSN5310-01-108-7519
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 74A450660-2001 · 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: 0.156 INCHES NOMINAL IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.500 INCHES NOMINAL IN
•
HARDNESS RATING: 43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5629,COND H ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.750 INCHES MINIMUM AND 1.780 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
INTERNAL STRAIGHT KEY WIDTH0.156 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.500 INCHES NOMINAL IN
HARDNESS RATING43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5629,COND H ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.750 INCHES MINIMUM AND 1.780 INCHES MAXIMUM IN
MATERIAL THICKNESS0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL COMP XM-13 OVERALL
INTERNAL KEY QUANTITY2
SUBSTITUTES & CROSS-REFERENCES 1
10122156Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 74A450660-2001?
74A450660-2001 is a WASHER,KEY.
What parts can replace 74A450660-2001?
There is 1 known substitute for 74A450660-2001: 10122156. Substitute compatibility should be verified for your specific system.
What is the NSN for 74A450660-2001?
74A450660-2001 is cataloged in the U.S. Government catalog under NSN 5310-01-108-7519. 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.