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PartsTable / COMPONENT / 404-7277
404-7277 ✓ 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 303 OVERALL, thickness: 0.008 INCHES MINIMUM AND 0.012 INCHES MAXIMUM IN, hole_diameter: 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN, overall_diameter: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN, surface_treatment: PASSIVATE OVERALL, peripheral_shape_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-802-1988, 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
404-7277
NSN: 5310-00-802-1988
FSC: 5310
CAGE: A486G — NIMIKKEISTOKESKUS NCB FINLAND (FIN)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
thickness0.008 INCHES MINIMUM AND 0.012 INCHES MAXIMUM IN
hole_diameter0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
overall_diameter0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-802-1988
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 404-7277 · 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
•
MATERIAL: STEEL COMP 303 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
THICKNESS: 0.008 INCHES MINIMUM AND 0.012 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 303 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.008 INCHES MINIMUM AND 0.012 INCHES MAXIMUM IN
HOLE DIAMETER0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
B-44Interchangeable
interchangeable cross-reference
interchangeable
SB-44Interchangeable
interchangeable cross-reference
interchangeable
GC12A44Interchangeable
interchangeable cross-reference
interchangeable
G6-84Interchangeable
interchangeable cross-reference
interchangeable
G6-84CPInterchangeable
interchangeable cross-reference
interchangeable
654-72021-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 404-7277?
404-7277 is a WASHER,FLAT.
What parts can replace 404-7277?
There are 23 known substitutes for 404-7277: B-44, SB-44, GC12A44 and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 404-7277?
404-7277 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-802-1988. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026