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WSI-4A-4 — NUT,SELF-LOCKING,PLATE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

WSI-4A-4: NUT,SELF-LOCKING,PLATE.

The NUT,SELF-LOCKING,PLATE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, nut_style: PLATE, nut_height: 0.380 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN, nut_length: 0.975 INCHES MINIMUM AND 0.995 INCHES MAXIMUM IN, plate_width: 0.386 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN, thread_class: 2B. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-230-0403, 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
WSI-4A-4
NSN: 5310-01-230-0403
FSC: 5310 — Nuts and Washers
CAGE: 04169 — ATLAS CORP WESTERN SKY INDUSTRIES DIV (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
nut_stylePLATE
nut_height0.380 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
nut_length0.975 INCHES MINIMUM AND 0.995 INCHES MAXIMUM IN
plate_width0.386 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
locking_featurePREVAILING TORQUE WITH METALLIC INSERT
plate_thickness0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentANODIZE OVERALL
nominal_thread_size0.190 INCHES IN
NSN5310-01-230-0403
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: WSI-4A-4 · 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
•
PLATE THICKNESS: 0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
•
NUT LENGTH: 0.975 INCHES MINIMUM AND 0.995 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNF
•
PLATE WIDTH: 0.386 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
•
MOUNTING HOLE ARRANGEMENT STYLE: 2 HOLES
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-A-12545 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MOUNTING HOLE DIAMETER: 0.128 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
PLATE THICKNESS0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
NUT LENGTH0.975 INCHES MINIMUM AND 0.995 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNF
PLATE WIDTH0.386 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
MOUNTING HOLE ARRANGEMENT STYLE2 HOLES
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-A-12545 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MOUNTING HOLE DIAMETER0.128 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.190 INCHES 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 1
BACN10TL3A4Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
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 WSI-4A-4?
WSI-4A-4 is a NUT,SELF-LOCKING,PLATE.
What parts can replace WSI-4A-4?
There is 1 known substitute for WSI-4A-4: BACN10TL3A4. Substitute compatibility should be verified for your specific system.
What is the NSN for WSI-4A-4?
WSI-4A-4 is cataloged in the U.S. Government catalog under NSN 5310-01-230-0403. 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.