PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 4B4276
4B4276 ✓ 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,FLAT is a the manufacturer industrial component. Key specifications include thickness: 0.051 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN, hole_diameter: 0.276 INCHES MINIMUM AND 0.296 INCHES MAXIMUM IN, overall_diameter: 0.620 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN, special_features: WEAPON SYSTEM ESSENTIAL, surface_treatment: CADMIUM AND CHROMATE OVERALL, peripheral_shape_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-595-5974, 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
4B4276
NSN: 5310-00-595-5974
FSC: 5310
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
thickness0.051 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
hole_diameter0.276 INCHES MINIMUM AND 0.296 INCHES MAXIMUM IN
overall_diameter0.620 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
special_featuresWEAPON SYSTEM ESSENTIAL
surface_treatmentCADMIUM AND CHROMATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
nondefinitive_spec/std_dataA TYPE AND 1 GRADE AND A CLASS
criticality_code_justificationFEAT
material_document_and_classificationASTM A109 ASSN STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-595-5974
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4B4276 · 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
•
THICKNESS: 0.051 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.250 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
NONDEFINITIVE SPEC/STD DATA: A TYPE AND A CLASS AND 1 GRADE
•
SURFACE TREATMENT: CADMIUM OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
OVERALL DIAMETER: 0.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.051 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
HOLE DIAMETER0.250 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
NONDEFINITIVE SPEC/STD DATAA TYPE AND A CLASS AND 1 GRADE
SURFACE TREATMENTCADMIUM OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
CENTER HOLE SHAPE STYLEROUND
OVERALL DIAMETER0.625 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
MS27183-10Interchangeable
interchangeable cross-reference
interchangeable
G9419274Interchangeable
interchangeable cross-reference
interchangeable
FFW92TYPEACLASSAGRADE1LIGHTInterchangeable
Same NIIN cross-reference
interchangeable
23MS15795-10Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 4B4276?
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 4B4276?
4B4276 is a WASHER,FLAT.
What parts can replace 4B4276?
There are 4 known substitutes for 4B4276: MS27183-10, G9419274, FFW92TYPEACLASSAGRADE1LIGHT and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4B4276?
4B4276 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-595-5974. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 4B4276

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026