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H9304 ✓ 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 1010 OVERALL, thickness: 0.062 INCHES NOMINAL IN, hole_diameter: 2.266 INCHES NOMINAL IN, hardness_rating: 30.0 ROCKWELL B MINIMUM AND 65.0 ROCKWELL B MAXIMUM, overall_diameter: 3.500 INCHES NOMINAL IN, 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 5310-00-363-7122, 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
H9304
NSN: 5310-00-363-7122
FSC: 5310
CAGE: 15434 — CUMMINS INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
thickness0.062 INCHES NOMINAL IN
hole_diameter2.266 INCHES NOMINAL IN
hardness_rating30.0 ROCKWELL B MINIMUM AND 65.0 ROCKWELL B MAXIMUM
overall_diameter3.500 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-363-7122
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: H9304 · 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 1010 OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
HOLE DIAMETER: 2.266 INCHES NOMINAL IN
•
THICKNESS: 0.062 INCHES NOMINAL IN
•
HARDNESS RATING: 30.0 ROCKWELL B MINIMUM AND 65.0 ROCKWELL B MAXIMUM
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OVERALL DIAMETER: 3.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 1010 OVERALL
PERIPHERAL SHAPE STYLEROUND
HOLE DIAMETER2.266 INCHES NOMINAL IN
THICKNESS0.062 INCHES NOMINAL IN
HARDNESS RATING30.0 ROCKWELL B MINIMUM AND 65.0 ROCKWELL B MAXIMUM
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL DIAMETER3.500 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
Z1057Interchangeable
interchangeable cross-reference
interchangeable
1856974-20Interchangeable
interchangeable cross-reference
interchangeable
930-4Interchangeable
interchangeable cross-reference
interchangeable
T518164PC4Interchangeable
interchangeable cross-reference
interchangeable
T51J164-4Interchangeable
interchangeable cross-reference
interchangeable
9S2-40-67189Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H9304?
H9304 is a WASHER,FLAT.
What parts can replace H9304?
There are 21 known substitutes for H9304: Z1057, 1856974-20, 930-4 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H9304?
H9304 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-363-7122. 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