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91475A020 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

91475A020: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 OVERALL, hole_diameter: 0.148 INCHES NOMINAL IN, outside_diameter: 0.250 INCHES NOMINAL IN, style_designator: SPLIT HELICAL-LEFT HAND, material_thickness: 0.031 INCHES MINIMUM IN, end_item_identification: 2590-01-544-7173. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-550-8803, 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
91475A020
NSN: 5310-01-550-8803
NIINs: 015508803, 015598240, 015865191
FSC: 5310 — Nuts and Washers
CAGE: 07070 — UNITED STATES DEPARTMENT OF THE NAVY DBA NAVAL SURFACE WARFARE CENTER PANAMA CITY (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OVERALL
hole_diameter0.148 INCHES NOMINAL IN
outside_diameter0.250 INCHES NOMINAL IN
style_designatorSPLIT HELICAL-LEFT HAND
material_thickness0.031 INCHES MINIMUM IN
end_item_identification2590-01-544-7173
part_name_assigned_by_controlling_agencyWASHER, LOCK
NSN5310-01-550-8803
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91475A020 · 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
TECHNICAL CHARACTERISTICS
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER, LOCK
END ITEM IDENTIFICATION2590-01-544-7173
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91475A020?
91475A020 is a WASHER,LOCK.
What is the NSN for 91475A020?
91475A020 is cataloged in the U.S. Government catalog under NSN 5310-01-550-8803. 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.