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88-20556-38 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

88-20556-38: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, hole_diameter: 0.252 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, outside_diameter: 0.487 INCHES NOMINAL IN, surface_treatment: PASSIVATE OVERALL, material_thickness: 0.062 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: WASHER,LOCK-SPRING,HELICAL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-571-9833, 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
88-20556-38
NSN: 5310-01-571-9833
FSC: 5310 — Nuts and Washers
CAGE: 30554 — DEPARTMENT OF DEFENSE PROJECT MANAGER-MOBILE ELECTRIC POWER (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
hole_diameter0.252 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
outside_diameter0.487 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
material_thickness0.062 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyWASHER,LOCK-SPRING,HELICAL
NSN5310-01-571-9833
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 88-20556-38 · 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
•
OUTSIDE DIAMETER: 0.487 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
HOLE DIAMETER: 0.252 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER0.487 INCHES NOMINAL IN
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER,LOCK-SPRING,HELICAL
MATERIALSTEEL CORROSION RESISTING OVERALL
HOLE DIAMETER0.252 INCHES MINIMUM AND 0.260 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

No substitute or cross-reference records for this part.

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 88-20556-38?
88-20556-38 is a WASHER,LOCK.
What is the NSN for 88-20556-38?
88-20556-38 is cataloged in the U.S. Government catalog under NSN 5310-01-571-9833. 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.