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K19701-3 — WASHER,CONCAVE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

K19701-3: WASHER,CONCAVE.

The WASHER,CONCAVE is a the manufacturer industrial component. Key specifications include radius: 0.235 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN, material: STEEL OVERALL, recess_depth: 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN, hole_diameter: 0.252 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN, outside_diameter: 0.375 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, style_designator: CONCAVE. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-934-9976, 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
K19701-3
NSN: 5310-00-934-9976
FSC: 5310 — Nuts and Washers
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
radius0.235 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN
materialSTEEL OVERALL
recess_depth0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
hole_diameter0.252 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN
outside_diameter0.375 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
style_designatorCONCAVE
surface_treatmentCADMIUM AND CHROMATE OVERALL
material_thickness0.078 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-934-9976
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: K19701-3 · 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 DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
RADIUS: 0.235 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CONCAVE
•
OUTSIDE DIAMETER: 0.375 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
•
RECESS DEPTH: 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.078 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
RADIUS0.235 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN
STYLE DESIGNATORCONCAVE
OUTSIDE DIAMETER0.375 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
RECESS DEPTH0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
MATERIAL THICKNESS0.078 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
MATERIALSTEEL OVERALL
HOLE DIAMETER0.252 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
2110546Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is K19701-3?
K19701-3 is a WASHER,CONCAVE.
What parts can replace K19701-3?
There is 1 known substitute for K19701-3: 2110546. Substitute compatibility should be verified for your specific system.
What is the NSN for K19701-3?
K19701-3 is cataloged in the U.S. Government catalog under NSN 5310-00-934-9976. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.