PartsTable
Technical Data Sheet
PartsTable / COMPONENT / QAP00280
QAP00280 ✓ 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,CASTELLATED,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: CASTELLATED, HEXAGON, nut_height: 0.344 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-146-0785, 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
QAP00280
NSN: 5310-00-146-0785
FSC: 5310
CAGE: 14153 — DEFENSE LOGISTICS AGENCY DBA DEFENSE SUPPLY CENTER PHILADELPHIA (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleCASTELLATED, HEXAGON
nut_height0.344 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.750 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch20
material_document_and_classificationH-AA STSBS002,FSCM 98897 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-146-0785
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: QAP00280 · 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
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 20
•
WIDTH ACROSS FLATS: 0.750 INCHES NOMINAL IN
•
THREAD CLASS: 3B
•
NUT STYLE: CASTELLATED, HEXAGON
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.438 INCHES IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH20
WIDTH ACROSS FLATS0.750 INCHES NOMINAL IN
THREAD CLASS3B
NUT STYLECASTELLATED, HEXAGON
MATERIALSTEEL OVERALL
BEARING SURFACE TYPEWASHER FACED
SURFACE TREATMENTCADMIUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
AX53-2Interchangeable
interchangeable cross-reference
interchangeable
AX53SET2Interchangeable
interchangeable cross-reference
interchangeable
2AX53Interchangeable
interchangeable cross-reference
interchangeable
45120Interchangeable
interchangeable cross-reference
interchangeable
A532Interchangeable
interchangeable cross-reference
interchangeable
7022390Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy QAP00280?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is QAP00280?
QAP00280 is a NUT,PLAIN,CASTELLATED,HEXAGON.
What parts can replace QAP00280?
There are 14 known substitutes for QAP00280: AX53-2, AX53SET2, 2AX53 and 11 more. Substitute compatibility should be verified for your specific system.
Is QAP00280 still available?
QAP00280 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — QAP00280

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026