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MS21244-8 — NUT,PLAIN,ASSEMBLED WASHER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

MS21244-8: NUT,PLAIN,ASSEMBLED WASHER.

The NUT,PLAIN,ASSEMBLED WASHER is a the manufacturer industrial component. Key specifications include special_features: TECHNICAL MAITENANCE MANUAL:54-32-02, supplementary_features: PART OF THE SLIDING FAIRING ROLLER STUD-INSTALLATION, end_item_identification: SIKORSKY HELICOPTER MODEL S-92A A, part_name_assigned_by_controlling_agency: NUT. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-181-6121, 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
MS21244-8
NSN: 5310-00-181-6121
NIINs: 001816121, 016667293
FSC: 5310 — Nuts and Washers
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
special_featuresTECHNICAL MAITENANCE MANUAL:54-32-02
supplementary_featuresPART OF THE SLIDING FAIRING ROLLER STUD-INSTALLATION
end_item_identificationSIKORSKY HELICOPTER MODEL S-92A A
part_name_assigned_by_controlling_agencyNUT
NSN5310-00-181-6121
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS21244-8 · 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-35 FED SPEC 2ND TREATMENT RESPONSE WASHER
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
TEMP RATING: 450.0 FAHRENHEIT NOMINAL DEGF
•
NUT COUNTERBORE DEPTH: 0.281 INCHES MINIMUM AND 0.301 INCHES MAXIMUM NUT IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
COUNTERBORE DIAMETER: 0.604 INCHES MINIMUM AND 0.614 INCHES MAXIMUM NUT IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC 2ND TREATMENT RESPONSE WASHER
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY 2 CL 3 FED SPEC 1ST TREATMENT RESPONSE NUT
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
TEMP RATING450.0 FAHRENHEIT NOMINAL DEGF
NUT COUNTERBORE DEPTH0.281 INCHES MINIMUM AND 0.301 INCHES MAXIMUM NUT IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.500 INCHES IN
COUNTERBORE DIAMETER0.604 INCHES MINIMUM AND 0.614 INCHES MAXIMUM NUT IN
SURFACE TREATMENTCADMIUM NUT
SURFACE TREATMENTPASSIVATE WASHER
SUBSTITUTES & CROSS-REFERENCES 1
9770-8Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS21244-8?
MS21244-8 is a NUT,PLAIN,ASSEMBLED WASHER.
What parts can replace MS21244-8?
There is 1 known substitute for MS21244-8: 9770-8. Substitute compatibility should be verified for your specific system.
What is the NSN for MS21244-8?
MS21244-8 is cataloged in the U.S. Government catalog under NSN 5310-00-181-6121. 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.