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PartsTable / COMPONENT / QQ-N-281 GRADE 400 OR 405
QQ-N-281 GRADE 400 OR 405 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include departure_from_cited_document: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS, criticality_code_justification: ZZZW, reference_number_differentiating_characteristics: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-207-4732, 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
QQ-N-281 GRADE 400 OR 405
NSN: 5310-01-207-4732
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
departure_from_cited_documentMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
criticality_code_justificationZZZW
reference_number_differentiating_characteristicsMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
NSN5310-01-207-4732
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: QQ-N-281 GRADE 400 OR 405 · 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
•
DEPARTURE FROM CITED DOCUMENT: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
•
CRITICALITY CODE JUSTIFICATION: ZZZW
TECHNICAL CHARACTERISTICS (FLIS)
DEPARTURE FROM CITED DOCUMENTMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
CRITICALITY CODE JUSTIFICATIONZZZW
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
MIL-DTL-1222 TYPE IIIL1Interchangeable
interchangeable cross-reference
interchangeable
655-8803PCF11L1Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222 GR500L1Interchangeable
interchangeable cross-reference
interchangeable
9/16-12UNC-2BInterchangeable
interchangeable cross-reference
interchangeable
MIL-S-1222G TY1Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222L1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is QQ-N-281 GRADE 400 OR 405?
QQ-N-281 GRADE 400 OR 405 is a NUT,PLAIN,HEXAGON.
What parts can replace QQ-N-281 GRADE 400 OR 405?
There are 21 known substitutes for QQ-N-281 GRADE 400 OR 405: MIL-DTL-1222 TYPE IIIL1, 655-8803PCF11L1, MIL-DTL-1222 GR500L1 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for QQ-N-281 GRADE 400 OR 405?
QQ-N-281 GRADE 400 OR 405 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-207-4732. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026