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47FW1812 — NUT,PLAIN,EXTENDED WASHER,DOUBLE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

47FW1812: NUT,PLAIN,EXTENDED WASHER,DOUBLE.

NUT,PLAIN,EXTENDED WASHER,DOUBLE. Key specifications include material: STEEL OVERALL, nut_style: DOUBLE HEXAGON, temp_rating: 450.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNF, overall_height: 1.311 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-979-8955, 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
47FW1812
NSN: 5310-00-979-8955
FSC: 5310 — Nuts and Washers
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleDOUBLE HEXAGON
temp_rating450.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
overall_height1.311 INCHES MAXIMUM IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
washer_thickness0.310 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
width_across_flats1.364 INCHES MINIMUM AND 1.377 INCHES MAXIMUM IN
nominal_thread_size1.125 INCHES IN
NSN5310-00-979-8955
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 47FW1812 · 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
•
WASHER OUTSIDE DIAMETER: 1.860 INCHES MINIMUM AND 1.890 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 1.364 INCHES MINIMUM AND 1.377 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNF
•
TEMP RATING: 450.0 FAHRENHEIT NOMINAL DEGF
•
HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
•
WASHER THICKNESS: 0.310 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.311 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER1.860 INCHES MINIMUM AND 1.890 INCHES MAXIMUM IN
WIDTH ACROSS FLATS1.364 INCHES MINIMUM AND 1.377 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNF
TEMP RATING450.0 FAHRENHEIT NOMINAL DEGF
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
WASHER THICKNESS0.310 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.125 INCHES IN
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
VN465A182Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
BACN10B482Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 47FW1812?
47FW1812 is a NUT,PLAIN,EXTENDED WASHER,DOUBLE.
What parts can replace 47FW1812?
There are 2 known substitutes for 47FW1812: VN465A182, BACN10B482. Substitute compatibility should be verified for your specific system.
What is the NSN for 47FW1812?
47FW1812 is cataloged in the U.S. Government catalog under NSN 5310-00-979-8955. 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.