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55002051 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

55002051: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: ZINC OVERALL, hole_diameter: 0.22 INCHES NOMINAL IN, outside_diameter: 0.38 INCHES NOMINAL IN, style_designator: ROUND GRIP TYPE B, material_thickness: 0.05 INCHES MINIMUM IN, end_item_identification: 2320015323599. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-610-6932, 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
55002051
NSN: 5310-01-610-6932
FSC: 5310 — Nuts and Washers
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialZINC OVERALL
hole_diameter0.22 INCHES NOMINAL IN
outside_diameter0.38 INCHES NOMINAL IN
style_designatorROUND GRIP TYPE B
material_thickness0.05 INCHES MINIMUM IN
end_item_identification2320015323599
part_name_assigned_by_controlling_agencyWASHER,LOCK
NSN5310-01-610-6932
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 55002051 · 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
•
STYLE DESIGNATOR: ROUND GRIP TYPE B
•
OUTSIDE DIAMETER: 0.38 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.05 INCHES MINIMUM IN
•
MATERIAL: ZINC OVERALL
•
HOLE DIAMETER: 0.22 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORROUND GRIP TYPE B
OUTSIDE DIAMETER0.38 INCHES NOMINAL IN
MATERIAL THICKNESS0.05 INCHES MINIMUM IN
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER,LOCK
END ITEM IDENTIFICATION2320015323599
MATERIALZINC OVERALL
HOLE DIAMETER0.22 INCHES NOMINAL 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
91102A745Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 55002051?
55002051 is a WASHER,LOCK.
What parts can replace 55002051?
There is 1 known substitute for 55002051: 91102A745. Substitute compatibility should be verified for your specific system.
What is the NSN for 55002051?
55002051 is cataloged in the U.S. Government catalog under NSN 5310-01-610-6932. 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.