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MS21299C14 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

MS21299C14: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL, recess_angle: 90.0 DEGREES NOMINAL, hole_diameter: 0.877 INCHES MINIMUM AND 0.881 INCHES MAXIMUM IN, hardness_rating: 39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM, recess_diameter: 1.028 INCHES MINIMUM AND 1.038 INCHES MAXIMUM IN, outside_diameter: 1.658 INCHES MINIMUM AND 1.668 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-088-8958, 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
MS21299C14
NSN: 5310-01-088-8958
FSC: 5310 — Nuts and Washers
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OVERALL
recess_angle90.0 DEGREES NOMINAL
hole_diameter0.877 INCHES MINIMUM AND 0.881 INCHES MAXIMUM IN
hardness_rating39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
recess_diameter1.028 INCHES MINIMUM AND 1.038 INCHES MAXIMUM IN
outside_diameter1.658 INCHES MINIMUM AND 1.668 INCHES MAXIMUM IN
style_designatorRECESSED
surface_treatmentCADMIUM AND CHROMATE OVERALL
material_thickness0.071 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-088-8958
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS21299C14 · 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 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
HARDNESS RATING: 39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.658 INCHES MINIMUM AND 1.668 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.071 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
•
RECESS DIAMETER: 1.028 INCHES MINIMUM AND 1.038 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.658 INCHES MINIMUM AND 1.668 INCHES MAXIMUM IN
MATERIAL THICKNESS0.071 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
RECESS DIAMETER1.028 INCHES MINIMUM AND 1.038 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
MATERIALSTEEL COMP 4130 OVERALL
HOLE DIAMETER0.877 INCHES MINIMUM AND 0.881 INCHES MAXIMUM 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

No substitute or cross-reference records for this part.

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 MS21299C14?
MS21299C14 is a WASHER,RECESSED.
What is the NSN for MS21299C14?
MS21299C14 is cataloged in the U.S. Government catalog under NSN 5310-01-088-8958. 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.