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K29913-3NF — WASHER,CONCAVE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

K29913-3NF: WASHER,CONCAVE.

The WASHER,CONCAVE is a the manufacturer industrial component. Key specifications include radius: 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN, material: STEEL COMP 630 OVERALL, hole_diameter: 0.295 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN, surface_finish: 32.0 MICROINCHES COUNTERBORE WALL, hardness_rating: 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM, outside_diameter: 0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-044-2299, 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
K29913-3NF
NSN: 5310-01-044-2299
FSC: 5310 — Nuts and Washers
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
radius0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
materialSTEEL COMP 630 OVERALL
hole_diameter0.295 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES COUNTERBORE WALL
hardness_rating38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
outside_diameter0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN
style_designatorCONCAVE
surface_treatmentPASSIVATE OVERALL
material_thickness0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
material_document_and_classificationAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-044-2299
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: K29913-3NF · 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 FINISH: 32.0 MICROINCHES COUNTERBORE WALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
RADIUS: 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
•
HARDNESS RATING: 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: CONCAVE
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES COUNTERBORE WALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
RADIUS0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
HARDNESS RATING38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORCONCAVE
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN
MATERIAL THICKNESS0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL COMP 630 OVERALL
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
BACW10CA3CCUSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is K29913-3NF?
K29913-3NF is a WASHER,CONCAVE.
What parts can replace K29913-3NF?
There is 1 known substitute for K29913-3NF: BACW10CA3CCU. Substitute compatibility should be verified for your specific system.
What is the NSN for K29913-3NF?
K29913-3NF is cataloged in the U.S. Government catalog under NSN 5310-01-044-2299. This indicates validated use in U.S. government and defense supply chains.
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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.