PartsTable
Technical Data Sheet
Download PDF

U343-0100 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

U343-0100: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1050 OR STEEL COMP 1075 OVERALL, hole_diameter: 0.363 INCHES NOMINAL0.363 INCHES NOMINAL IN, overall_height: 0.120 INCHES NOMINAL0.120 INCHES NOMINAL IN, hardness_rating: 46.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM50.0 ROCKWELL C MAXIMUM, outside_diameter: 0.672 INCHES NOMINAL0.672 INCHES NOMINAL IN, special_features: COLOR THERMAL BLUE FROM HEAT TREATMENTCOLOR THERMAL BLUE FROM HEAT TREATMENT. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-081-5465, 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
U343-0100
NSN: 5310-01-081-5465
FSC: 5310 — Nuts and Washers
CAGE: 56048 — ASSOCIATED SPRING CORP DIV OF THE BARNES GROUP INC DALLAS DIV (USA)
SPECIFICATIONS
materialSTEEL COMP 1050 OR STEEL COMP 1075 OVERALL
hole_diameter0.363 INCHES NOMINAL0.363 INCHES NOMINAL IN
overall_height0.120 INCHES NOMINAL0.120 INCHES NOMINAL IN
hardness_rating46.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM50.0 ROCKWELL C MAXIMUM
outside_diameter0.672 INCHES NOMINAL0.672 INCHES NOMINAL IN
special_featuresCOLOR THERMAL BLUE FROM HEAT TREATMENTCOLOR THERMAL BLUE FROM HEAT TREATMENT
material_thickness0.010 INCHES NOMINAL0.010 INCHES NOMINAL IN
material_document_and_classificationSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
NSN5310-01-081-5465
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: U343-0100 · 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
•
HARDNESS RATING: 46.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM50.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 0.672 INCHES NOMINAL0.672 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.010 INCHES NOMINAL0.010 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1050 OR STEEL COMP 1075 OVERALL
•
HOLE DIAMETER: 0.363 INCHES NOMINAL0.363 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.120 INCHES NOMINAL0.120 INCHES NOMINAL IN
HARDNESS RATING46.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM50.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER0.672 INCHES NOMINAL0.672 INCHES NOMINAL IN
MATERIAL THICKNESS0.010 INCHES NOMINAL0.010 INCHES NOMINAL IN
SPECIAL FEATURESCOLOR THERMAL BLUE FROM HEAT TREATMENTCOLOR THERMAL BLUE FROM HEAT TREATMENT
MATERIALSTEEL COMP 1050 OR STEEL COMP 1075 OVERALL
HOLE DIAMETER0.363 INCHES NOMINAL0.363 INCHES NOMINAL 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 1
SM-C-772961-3Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy U343-0100?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is U343-0100?
U343-0100 is a WASHER,SPRING TENSION.
What parts can replace U343-0100?
There is 1 known substitute for U343-0100: SM-C-772961-3. Substitute compatibility should be verified for your specific system.
What is the NSN for U343-0100?
U343-0100 is cataloged in the U.S. Government catalog under NSN 5310-01-081-5465. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — U343-0100

✓ 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.