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VCU0001 — NUT,PLAIN,EXTENDED WASHER,DOUBLE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

VCU0001: NUT,PLAIN,EXTENDED WASHER,DOUBLE.

NUT,PLAIN,EXTENDED WASHER,DOUBLE. Key specifications include material: STEEL COMP 8740 OVERALL, nut_style: DOUBLE HEXAGON, thread_class: 3B, thread_series: UNF, overall_height: 0.335 INCHES MINIMUM AND 0.355 INCHES MAXIMUM IN, special_features: ROUND CASTELLATION,0.090 IN. H,0.308 IN.

DIA W/6 EQUALLY SPACED SLOTS 0.065 IN. MIN 0.075 IN. MAX W 0.90 IN.

DEPTH IN. This part is cataloged in the U.S. Government catalog under NSN 5310-00-950-2601, 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
VCU0001
NSN: 5310-00-950-2601
FSC: 5310 — Nuts and Washers
CAGE: 06710 — VALLEY-TODECO, INC. DBA ARCONIC FASTENING SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OVERALL
nut_styleDOUBLE HEXAGON
thread_class3B
thread_seriesUNF
overall_height0.335 INCHES MINIMUM AND 0.355 INCHES MAXIMUM IN
special_featuresROUND CASTELLATION,0.090 IN. H,0.308 IN. DIA W/6 EQUALLY SPACED SLOTS 0.065 IN. MIN 0.075 IN. MAX W 0.90 IN. DEPTH IN
thread_directionRIGHT-HAND
washer_thickness0.015 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
width_across_flats0.298 INCHES MINIMUM AND 0.318 INCHES MAXIMUM IN
nominal_thread_size0.250 INCHES IN
washer_outside_diameter0.460 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN
NSN5310-00-950-2601
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: VCU0001 · 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
•
WASHER OUTSIDE DIAMETER: 0.460 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.298 INCHES MINIMUM AND 0.318 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNF
•
WASHER THICKNESS: 0.015 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.335 INCHES MINIMUM AND 0.355 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER0.460 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.298 INCHES MINIMUM AND 0.318 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNF
WASHER THICKNESS0.015 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
SPECIAL FEATURESROUND CASTELLATION,0.090 IN. H,0.308 IN. DIA W/6 EQUALLY SPACED SLOTS 0.065 IN. MIN 0.075 IN. MAX W 0.90 IN. DEPTH 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 2
369A1603Reference document
Same NSN cross-reference
Reference document — Secondary reference
79325-428Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is VCU0001?
VCU0001 is a NUT,PLAIN,EXTENDED WASHER,DOUBLE.
What parts can replace VCU0001?
There are 2 known substitutes for VCU0001: 369A1603, 79325-428. Substitute compatibility should be verified for your specific system.
What is the NSN for VCU0001?
VCU0001 is cataloged in the U.S. Government catalog under NSN 5310-00-950-2601. 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.