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PartsTable / COMPONENT / 54X549
54X549 ✓ 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,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.763 INCHES MINIMUM AND 0.791 INCHES MAXIMUM IN, hardness_rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM, outside_diameter: 1.299 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, material_thickness: 0.226 INCHES MINIMUM AND 0.236 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-010-3332, 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
54X549
NSN: 5310-00-010-3332
FSC: 5310
CAGE: 24446 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.763 INCHES MINIMUM AND 0.791 INCHES MAXIMUM IN
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
outside_diameter1.299 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
material_thickness0.226 INCHES MINIMUM AND 0.236 INCHES MAXIMUM IN
nondefinitive_spec/std_data3 STYLE AND A CLASS
material_document_and_classificationFED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-010-3332
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 54X549 · 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
•
NONDEFINITIVE SPEC/STD DATA: 3 STYLE AND A CLASS
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
OUTSIDE DIAMETER: 1.299 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
HOLE DIAMETER: 0.763 INCHES MINIMUM AND 0.791 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
MATERIAL THICKNESS: 0.226 INCHES MINIMUM AND 0.236 INCHES MAXIMUM IN
•
HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA3 STYLE AND A CLASS
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
OUTSIDE DIAMETER1.299 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
HOLE DIAMETER0.763 INCHES MINIMUM AND 0.791 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
MATERIAL THICKNESS0.226 INCHES MINIMUM AND 0.236 INCHES MAXIMUM IN
HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
664664Interchangeable
interchangeable cross-reference
interchangeable
782796Interchangeable
interchangeable cross-reference
interchangeable
829790Interchangeable
interchangeable cross-reference
interchangeable
4315Interchangeable
interchangeable cross-reference
interchangeable
MS17161-62Interchangeable
interchangeable cross-reference
interchangeable
349BMZ216Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 54X549?
54X549 is a WASHER,LOCK.
What parts can replace 54X549?
There are 26 known substitutes for 54X549: 664664, 782796, 829790 and 23 more. Substitute compatibility should be verified for your specific system.
Is 54X549 still available?
54X549 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