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492389 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

492389: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 631 OVERALL, hole_diameter: 1.260 INCHES MINIMUM AND 1.270 INCHES MAXIMUM IN, outside_diameter: 1.370 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.027 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN, external_straight_key_width: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-471-0784, 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
492389
NSN: 5310-00-471-0784
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP 631 OVERALL
hole_diameter1.260 INCHES MINIMUM AND 1.270 INCHES MAXIMUM IN
outside_diameter1.370 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.027 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
external_key_quantity9
internal_key_quantity8
external_straight_key_width0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
internal_straight_key_width0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
overall_distance_including_keys1.580 INCHES MINIMUM AND 1.600 INCHES MAXIMUM IN
material_document_and_classificationAMS 5528 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
distance_from_centerline_to_top_of_internal_key0.505 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
NSN5310-00-471-0784
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 492389 · 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: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.505 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 1.580 INCHES MINIMUM AND 1.600 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5528 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.370 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.027 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
•
EXTERNAL STRAIGHT KEY WIDTH: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
INTERNAL STRAIGHT KEY WIDTH0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.505 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS1.580 INCHES MINIMUM AND 1.600 INCHES MAXIMUM IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5528 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.370 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN
MATERIAL THICKNESS0.027 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
EXTERNAL STRAIGHT KEY WIDTH0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY9
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

No substitute or cross-reference records for this part.

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 492389?
492389 is a WASHER,KEY.
What is the NSN for 492389?
492389 is cataloged in the U.S. Government catalog under NSN 5310-00-471-0784. 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.