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9HB57 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

9HB57: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include thickness: 0.074 INCHES MINIMUM IN, hole_diameter: 0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN, overall_diameter: 0.074 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN, surface_treatment: DICHROMATE OVERALL, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-533-3904, 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
9HB57
NSN: 5310-01-533-3904
FSC: 5310 — Nuts and Washers
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
thickness0.074 INCHES MINIMUM IN
hole_diameter0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN
overall_diameter0.074 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN
surface_treatmentDICHROMATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identification2320-01-465-2174; 2320-01-465-2176; 2320-01-465-2180; 2320-01-465-2182
cross-sectional_shape_styleRECTANGULAR
part_name_assigned_by_controlling_agencyFLAT WASHER
NSN5310-01-533-3904
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 9HB57 · 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
•
OVERALL DIAMETER: 0.074 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
COLOR: BLACK OVERALL
•
SURFACE TREATMENT: DICHROMATE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.074 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
COLORBLACK OVERALL
SURFACE TREATMENTDICHROMATE OVERALL
PERIPHERAL SHAPE STYLEROUND
PART NAME ASSIGNED BY CONTROLLING AGENCYFLAT WASHER
END ITEM IDENTIFICATION2320-01-465-2174; 2320-01-465-2176; 2320-01-465-2180; 2320-01-465-2182
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN
THICKNESS0.074 INCHES MINIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
107354Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 9HB57?
9HB57 is a WASHER,FLAT.
What parts can replace 9HB57?
There is 1 known substitute for 9HB57: 107354. Substitute compatibility should be verified for your specific system.
What is the NSN for 9HB57?
9HB57 is cataloged in the U.S. Government catalog under NSN 5310-01-533-3904. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.