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43N71918-10 — NUT,PLAIN,CASTELLATED,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

43N71918-10: NUT,PLAIN,CASTELLATED,HEXAGON.

The NUT,PLAIN,CASTELLATED,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: CASTELLATED, HEXAGON, nut_height: 0.212 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-655-9484, 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
43N71918-10
NSN: 5310-00-655-9484
FSC: 5310 — Nuts and Washers
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleCASTELLATED, HEXAGON
nut_height0.212 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats0.4375 INCHES MINIMUM AND 0.4380 INCHES MAXIMUM IN
nominal_thread_size0.250 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch28
nondefinitive_spec/std_data4 TYPE AND 16 STYLE
material_document_and_classificationMIL-S-1222 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-655-9484
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 43N71918-10 · 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
•
WIDTH ACROSS FLATS: 0.4375 INCHES MINIMUM AND 0.4380 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-1222 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NONDEFINITIVE SPEC/STD DATA: 4 TYPE AND 16 STYLE
•
NUT HEIGHT: 0.212 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
•
NUT STYLE: CASTELLATED, HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.4375 INCHES MINIMUM AND 0.4380 INCHES MAXIMUM IN
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-1222 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NONDEFINITIVE SPEC/STD DATA4 TYPE AND 16 STYLE
NUT HEIGHT0.212 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
NUT STYLECASTELLATED, HEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH28
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 3
5310006559484Reference document
Same NSN cross-reference
Reference document — Informative reference only
645167P428Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
FF-N-836Reference document
Same NSN cross-reference
Reference document — Identification 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 43N71918-10?
43N71918-10 is a NUT,PLAIN,CASTELLATED,HEXAGON.
What parts can replace 43N71918-10?
There are 3 known substitutes for 43N71918-10: 5310006559484, 645167P428, FF-N-836. Substitute compatibility should be verified for your specific system.
What is the NSN for 43N71918-10?
43N71918-10 is cataloged in the U.S. Government catalog under NSN 5310-00-655-9484. This indicates validated use in U.S. government and defense supply chains.
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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.