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PartsTable / COMPONENT / MS9549-10
MS9549-10 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 321 OVERALL, thickness: 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN, hole_diameter: 0.276 INCHES NOMINAL IN, surface_finish: 63.0 MICROINCHES BOTTOM, overall_diameter: 0.500 INCHES NOMINAL IN, peripheral_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-938-8387, 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
MS9549-10
NSN: 5310-00-938-8387
FSC: 5310
CAGE: A0126 — LEONARDO SPA HELICOPTERS DIVISION - PRODUCTION SITE (ITA)
SPECIFICATIONS
materialSTEEL COMP 321 OVERALL
thickness0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
hole_diameter0.276 INCHES NOMINAL IN
surface_finish63.0 MICROINCHES BOTTOM
overall_diameter0.500 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationAMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-938-8387
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS9549-10 · 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
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
CENTER HOLE SHAPE STYLE: ROUND
•
THICKNESS: 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
•
SURFACE FINISH: 63.0 MICROINCHES BOTTOM
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 321 OVERALL
•
OVERALL DIAMETER: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
SURFACE FINISH63.0 MICROINCHES BOTTOM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE FINISH63.0 MICROINCHES TOP
MATERIALSTEEL COMP 321 OVERALL
OVERALL DIAMETER0.500 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
HOLE DIAMETER0.276 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
303887Interchangeable
interchangeable cross-reference
interchangeable
9167664-52Interchangeable
interchangeable cross-reference
interchangeable
83143Interchangeable
interchangeable cross-reference
interchangeable
507295Interchangeable
interchangeable cross-reference
interchangeable
NSN SPECIFIC V-22 AE1107C ENGINEInterchangeable
interchangeable cross-reference
interchangeable
MS9549-10Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS9549-10?
MS9549-10 is a WASHER,FLAT.
What parts can replace MS9549-10?
There are 10 known substitutes for MS9549-10: 303887, 9167664-52, 83143 and 7 more. Substitute compatibility should be verified for your specific system.
Is MS9549-10 still available?
MS9549-10 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026