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3903723 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

3903723: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1008 OVERALL, thickness: 0.043 INCHES NOMINAL IN, hole_diameter: 0.213 INCHES NOMINAL IN, hardness_rating: 60.0 ROCKWELL A MINIMUM AND 62.0 ROCKWELL A MAXIMUM, overall_diameter: 0.383 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-471-6451, 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
3903723
NSN: 5310-00-471-6451
NIINs: 004716451, 012341411
FSC: 5310 — Nuts and Washers
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL COMP 1008 OVERALL
thickness0.043 INCHES NOMINAL IN
hole_diameter0.213 INCHES NOMINAL IN
hardness_rating60.0 ROCKWELL A MINIMUM AND 62.0 ROCKWELL A MAXIMUM
overall_diameter0.383 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationASTM A29, UNS G10080 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-471-6451
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3903723 · 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: 0.5671 INCHES MINIMUM AND 0.5871 INCHES MAXIMUM IN
•
HARDNESS RATING: 21.2 ROCKWELL C MINIMUM AND 24.7 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A29, UNS G15260 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: CADMIUM OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 1524 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.5671 INCHES MINIMUM AND 0.5871 INCHES MAXIMUM IN
HARDNESS RATING21.2 ROCKWELL C MINIMUM AND 24.7 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A29, UNS G15260 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTCADMIUM OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 1524 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.3300 INCHES MINIMUM AND 0.3400 INCHES MAXIMUM IN
THICKNESS0.0180 INCHES MINIMUM AND 0.0220 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
99-9459071Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3903723?
3903723 is a WASHER,FLAT.
What parts can replace 3903723?
There is 1 known substitute for 3903723: 99-9459071. Substitute compatibility should be verified for your specific system.
What is the NSN for 3903723?
3903723 is cataloged in the U.S. Government catalog under NSN 5310-00-471-6451. 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.