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91E3-1A — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

91E3-1A: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, hole_diameter: 0.430 INCHES NOMINAL IN, outside_diameter: 0.680 INCHES NOMINAL IN, style_designator: SPLIT HELICAL-RIGHT HAND, material_thickness: 0.025 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-480-0072, 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
91E3-1A
NSN: 5310-00-480-0072
FSC: 5310 — Nuts and Washers
CAGE: 71286 — HOWMET GLOBAL FASTENING SYSTEMS INC DIV CAMLOC PRODUCTS (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
hole_diameter0.430 INCHES NOMINAL IN
outside_diameter0.680 INCHES NOMINAL IN
style_designatorSPLIT HELICAL-RIGHT HAND
material_thickness0.025 INCHES NOMINAL IN
NSN5310-00-480-0072
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91E3-1A · 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: SPLIT HELICAL-RIGHT HAND
•
OUTSIDE DIAMETER: 0.680 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.025 INCHES NOMINAL IN
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
HOLE DIAMETER: 0.430 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
OUTSIDE DIAMETER0.680 INCHES NOMINAL IN
MATERIAL THICKNESS0.025 INCHES NOMINAL IN
MATERIALSTEEL CORROSION RESISTING OVERALL
HOLE DIAMETER0.430 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 5
91S3-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
WEA124030Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
91297218Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
PDA31826Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
X01368Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91E3-1A?
91E3-1A is a WASHER,LOCK.
What parts can replace 91E3-1A?
There are 5 known substitutes for 91E3-1A: 91S3-1, WEA124030, 91297218 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 91E3-1A?
91E3-1A is cataloged in the U.S. Government catalog under NSN 5310-00-480-0072. 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.