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A34318 ✓ 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 color: BLACK OVERALL, material: STEEL COMP 1117 OVERALL, thickness: 0.290 INCHES NOMINAL IN, hole_diameter: 0.625 INCHES NOMINAL IN, overall_diameter: 1.375 INCHES NOMINAL IN, features_provided: CASEHARDENED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-044-7497, 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
A34318
NSN: 5310-01-044-7497
FSC: 5310
CAGE: 03990 — INGERSOLL-RAND COMPANY DBA INGERSOLL-RAND (USA)
SPECIFICATIONS
colorBLACK OVERALL
materialSTEEL COMP 1117 OVERALL
thickness0.290 INCHES NOMINAL IN
hole_diameter0.625 INCHES NOMINAL IN
overall_diameter1.375 INCHES NOMINAL IN
features_providedCASEHARDENED
surface_treatmentOXIDE FILM OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
surface_treatment_document_and_classification57-0-2C,TYPE 3,GRADE 1 MFR REF SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-044-7497
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A34318 · 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
•
COLOR: BLACK OVERALL
•
MATERIAL: STEEL COMP 1117 OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: 57-0-2C,TYPE 3,GRADE 1 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: OXIDE FILM OVERALL
•
FEATURES PROVIDED: CASEHARDENED
•
HOLE DIAMETER: 0.625 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
COLORBLACK OVERALL
MATERIALSTEEL COMP 1117 OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION57-0-2C,TYPE 3,GRADE 1 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTOXIDE FILM OVERALL
FEATURES PROVIDEDCASEHARDENED
HOLE DIAMETER0.625 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER1.375 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
5M392-4Interchangeable
interchangeable cross-reference
interchangeable
GS805K-4Interchangeable
interchangeable cross-reference
interchangeable
10-124724Interchangeable
interchangeable cross-reference
interchangeable
34318Interchangeable
interchangeable cross-reference
interchangeable
A4346-34318Interchangeable
interchangeable cross-reference
interchangeable
7A20035 FIND NO. 7Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A34318?
A34318 is a WASHER,FLAT.
What parts can replace A34318?
There are 7 known substitutes for A34318: 5M392-4, GS805K-4, 10-124724 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A34318?
A34318 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-044-7497. 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