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Technical Data Sheet
PartsTable / COMPONENT / 993339-3
993339-3 ✓ 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 WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.380 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN, heat_treatment: QUENCHED AND TEMPERED, overall_height: 0.035 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN, hardness_rating: 80.4 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 83.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM, outside_diameter: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-490-4791, 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
993339-3
NSN: 5310-00-490-4791
FSC: 5310
CAGE: 82577 — RAYTHEON COMPANY DBA RAYTHEON (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.380 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
heat_treatmentQUENCHED AND TEMPERED
overall_height0.035 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
hardness_rating80.4 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 83.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
outside_diameter0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
material_thickness0.010 INCHES NOMINAL IN
end_item_identification4920-01-209-5053
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-490-4791
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 993339-3 · 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
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
MATERIAL THICKNESS: 0.010 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL: STEEL OVERALL
•
OUTSIDE DIAMETER: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.380 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
MATERIAL THICKNESS0.010 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL OVERALL
END ITEM IDENTIFICATION4920-01-209-5053
OVERALL HEIGHT0.035 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
HOLE DIAMETER0.380 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
HARDNESS RATING80.4 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 83.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
HEAT TREATMENTQUENCHED AND TEMPERED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
357PInterchangeable
interchangeable cross-reference
interchangeable
D445-S4700-373Interchangeable
interchangeable cross-reference
interchangeable
SL5056PC82Interchangeable
interchangeable cross-reference
interchangeable
17137Interchangeable
interchangeable cross-reference
interchangeable
10475Interchangeable
interchangeable cross-reference
interchangeable
FMHT10328Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 993339-3?
993339-3 is a WASHER,SPRING TENSION.
What parts can replace 993339-3?
There are 7 known substitutes for 993339-3: 357P, D445-S4700-373, SL5056PC82 and 4 more. Substitute compatibility should be verified for your specific system.
Is 993339-3 still available?
993339-3 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026