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B1866 PIECE 10 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

B1866 PIECE 10: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL UNS K04002 OVERALL, nut_style: HEXAGON, nut_height: 0.464 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-376-0486, 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
B1866 PIECE 10
NSN: 5310-01-376-0486
FSC: 5310 — Nuts and Washers
CAGE: 11859 — HUNT VALVE COMPANY, INC. (USA)
SPECIFICATIONS
materialSTEEL UNS K04002 OVERALL
nut_styleHEXAGON
nut_height0.464 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
width_across_flats0.850 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
nominal_thread_size0.500 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch13
material_document_and_classificationASTM-A194-2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-376-0486
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: B1866 PIECE 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: 0.850 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM-A194-2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
NUT HEIGHT: 0.464 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.850 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATIONASTM-A194-2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.500 INCHES IN
NUT HEIGHT0.464 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH13
MATERIALSTEEL UNS K04002 OVERALL
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 2
D1866 PIECE 10 3-BReference document
Same NSN cross-reference
Reference document — Design control — primary reference
D-1866 PIECE 10Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B1866 PIECE 10?
B1866 PIECE 10 is a NUT,PLAIN,HEXAGON.
What parts can replace B1866 PIECE 10?
There are 2 known substitutes for B1866 PIECE 10: D1866 PIECE 10 3-B, D-1866 PIECE 10. Substitute compatibility should be verified for your specific system.
What is the NSN for B1866 PIECE 10?
B1866 PIECE 10 is cataloged in the U.S. Government catalog under NSN 5310-01-376-0486. 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.