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4D0009C4 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4D0009C4: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 718 OVERALL, thickness: 0.057 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN, hole_diameter: 0.251 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN, hardness_rating: 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM, outside_diameter: 0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN, special_features: RECESS DIAMETER: 0.310 IN. MIN.

AND 0.320 IN. MAX.;RECESS ANGLE: 90.0 DEG. NOM.;STYLE DESIGNATOR: RECESSED IN.

This part is cataloged in the U.S. Government catalog under NSN 5310-01-323-2920, 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
4D0009C4
NSN: 5310-01-323-2920
FSC: 5310 — Nuts and Washers
CAGE: 10630 — ANILLO INDUSTRIES LLC (USA)
SPECIFICATIONS
materialNICKEL ALLOY 718 OVERALL
thickness0.057 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN
hole_diameter0.251 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
outside_diameter0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
special_featuresRECESS DIAMETER: 0.310 IN. MIN. AND 0.320 IN. MAX.;RECESS ANGLE: 90.0 DEG. NOM.;STYLE DESIGNATOR: RECESSED IN
surface_treatmentPASSIVATE OVERALL
material_document_and_classificationAMS 5596 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5597 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-323-2920
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4D0009C4 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5596 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5597 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: NICKEL ALLOY 718 OVERALL
•
HOLE DIAMETER: 0.251 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5596 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5597 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
SPECIAL FEATURESRECESS DIAMETER: 0.310 IN. MIN. AND 0.320 IN. MAX.;RECESS ANGLE: 90.0 DEG. NOM.;STYLE DESIGNATOR: RECESSED IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALNICKEL ALLOY 718 OVERALL
HOLE DIAMETER0.251 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
THICKNESS0.057 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 5
MS14183L-C4Reference document
Same NSN cross-reference
Reference document — Secondary reference
5D0009C4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
NASM14183Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
10474817Reference document
Same NSN cross-reference
Reference document — Informative reference only
5310PL1248177Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4D0009C4?
4D0009C4 is a WASHER,FLAT.
What parts can replace 4D0009C4?
There are 5 known substitutes for 4D0009C4: MS14183L-C4, 5D0009C4, NASM14183 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4D0009C4?
4D0009C4 is cataloged in the U.S. Government catalog under NSN 5310-01-323-2920. 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.