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10121438 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

10121438: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OR STEEL COMP 416 OVERALL, recess_depth: 0.071 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN, hole_diameter: 0.250 INCHES NOMINAL IN, overall_height: 0.140 INCHES NOMINAL IN, outside_diameter: 0.556 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN, style_designator: RECESSED. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-515-0684, 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
10121438
NSN: 5310-00-515-0684
FSC: 5310 — Nuts and Washers
CAGE: A486G — NIMIKKEISTOKESKUS NCB FINLAND (FIN)
SPECIFICATIONS
materialSTEEL COMP 303 OR STEEL COMP 416 OVERALL
recess_depth0.071 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
hole_diameter0.250 INCHES NOMINAL IN
overall_height0.140 INCHES NOMINAL IN
outside_diameter0.556 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN
style_designatorRECESSED
surface_treatmentPASSIVATE OVERALL
material_thickness0.088 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
material_document_and_classificationASTM A 582 ASSN STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationMCP 5 FSCM 76050 MFR REF SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-515-0684
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 10121438 · 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: MCP 5 FSCM 76050 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A 582 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 0.556 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN
•
RECESS DEPTH: 0.071 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.088 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.140 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMCP 5 FSCM 76050 MFR REF SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A 582 ASSN STD ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER0.556 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN
RECESS DEPTH0.071 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
MATERIAL THICKNESS0.088 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL COMP 303 OR STEEL COMP 416 OVERALL
HOLE DIAMETER0.250 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
MC12250Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 10121438?
10121438 is a WASHER,RECESSED.
What parts can replace 10121438?
There is 1 known substitute for 10121438: MC12250. Substitute compatibility should be verified for your specific system.
What is the NSN for 10121438?
10121438 is cataloged in the U.S. Government catalog under NSN 5310-00-515-0684. 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.