MS21299 — WASHER,SPECIAL

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

MS21299: WASHER,SPECIAL.

The WASHER,SPECIAL is a the manufacturer industrial component. Key specifications include special_features: CRITICAL APPLICATION ITEM (CAI), end_item_identification: CH-53K AIRCRAFT, criticality_code_justification: FEAT, part_name_assigned_by_controlling_agency: SPECIAL WASHER. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-466-6146, 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

MS21299

NSN: 5310-01-466-6146
NIINs: 014666146, 016662194, 016662199
FSC: 5310 — Nuts and Washers
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

SPECIFICATIONS

special_features	CRITICAL APPLICATION ITEM (CAI)
end_item_identification	CH-53K AIRCRAFT
criticality_code_justification	FEAT
part_name_assigned_by_controlling_agency	SPECIAL WASHER
NSN	5310-01-466-6146

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE II,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

OVERALL DIAMETER: 2.381 INCHES MINIMUM AND 2.391 INCHES MAXIMUM IN

•

HARDNESS RATING: 39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM

•

MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6758 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-18729 MIL SPEC 2ND MATERIAL RESPONSE OVERALL

•

CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR

•

SURFACE TREATMENT: CADMIUM OVERALL

•

PERIPHERAL SHAPE STYLE: ROUND

TECHNICAL CHARACTERISTICS

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TYPE II,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
OVERALL DIAMETER	2.381 INCHES MINIMUM AND 2.391 INCHES MAXIMUM IN
HARDNESS RATING	39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-6758 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-18729 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
SURFACE TREATMENT	CADMIUM OVERALL
PERIPHERAL SHAPE STYLE	ROUND
END ITEM IDENTIFICATION	1730-01-268-4715;SOT EQUIPMENT (SE),B-2 BOMBER
MATERIAL	STEEL OVERALL
CENTER HOLE SHAPE STYLE	ROUND

SUBSTITUTES & CROSS-REFERENCES 2

MS21299-20Reference document

Same NSN cross-reference

Reference document — Secondary reference

NASM21299Reference document

Same NSN cross-reference

Reference document — Secondary reference

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 MS21299?

MS21299 is a WASHER,SPECIAL.

What parts can replace MS21299?

There are 2 known substitutes for MS21299: MS21299-20, NASM21299. Substitute compatibility should be verified for your specific system.

What is the NSN for MS21299?

MS21299 is cataloged in the U.S. Government catalog under NSN 5310-01-466-6146. This indicates validated use in U.S. government and defense supply chains.

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