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921355 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The SPRING ASY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: SHEET SPRING, nut_width: 0.630 INCHES NOMINAL IN, nut_length: 1.040 INCHES NOMINAL IN, panel_thickness: 0.112 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN, surface_treatment: PHOSPHATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-551-4779, 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
921355
NSN: 5310-00-551-4779
FSC: 5310
CAGE: 0AHU0 — KALMAR AC INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSHEET SPRING
nut_width0.630 INCHES NOMINAL IN
nut_length1.040 INCHES NOMINAL IN
panel_thickness0.112 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
surface_treatmentPHOSPHATE OVERALL
material_thickness0.028 INCHES NOMINAL IN
mating_member_diameter_accommodated0.312 INCHES NOMINAL IN
NSN5310-00-551-4779
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 921355 · 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
•
PANEL THICKNESS: 0.112 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PHOSPHATE OVERALL
•
MATERIAL: STEEL OVERALL
•
MATING MEMBER DIAMETER ACCOMMODATED: 0.312 INCHES NOMINAL IN
•
NUT LENGTH: 1.040 INCHES NOMINAL IN
•
NUT WIDTH: 0.630 INCHES NOMINAL IN
•
NUT STYLE: SHEET SPRING
•
MATERIAL THICKNESS: 0.028 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
PANEL THICKNESS0.112 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
SURFACE TREATMENTPHOSPHATE OVERALL
MATERIALSTEEL OVERALL
MATING MEMBER DIAMETER ACCOMMODATED0.312 INCHES NOMINAL IN
NUT LENGTH1.040 INCHES NOMINAL IN
NUT WIDTH0.630 INCHES NOMINAL IN
NUT STYLESHEET SPRING
MATERIAL THICKNESS0.028 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
7342459Interchangeable
interchangeable cross-reference
interchangeable
23206Interchangeable
interchangeable cross-reference
interchangeable
34-366Interchangeable
interchangeable cross-reference
interchangeable
921355Interchangeable
interchangeable cross-reference
interchangeable
C7511-5618-4Interchangeable
Same NIIN cross-reference
interchangeable
0921355Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 921355?
921355 is a SPRING ASY.
What parts can replace 921355?
There are 8 known substitutes for 921355: 7342459, 23206, 34-366 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 921355?
921355 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-551-4779. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026