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PartsTable / COMPONENT / 1683-B ITEM 12
1683-B ITEM 12 ✓ 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 material: COPPER ALLOY 922 OVERALL, nut_style: HEXAGON, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND, nominal_thread_size: 0.438 INCHES IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-423-0801, 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
1683-B ITEM 12
NSN: 5310-01-423-0801
FSC: 5310
CAGE: 90800 — ROMAC INDUSTRIES, INC. DBA HAYS FLUID CONTROLS DIV HAYS FLUID CONTROLS DIVISION (USA)
SPECIFICATIONS
materialCOPPER ALLOY 922 OVERALL
nut_styleHEXAGON
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
nominal_thread_size0.438 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch20
material_document_and_classificationASTMB584 B143-2A ASSN STD SINGLE MATERIAL RESPONSE OVERALL A
NSN5310-01-423-0801
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1683-B ITEM 12 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTMB584 B143-2A ASSN STD SINGLE MATERIAL RESPONSE OVERALL A
•
THREAD CLASS: 2B
•
THREAD SERIES: UNF
•
THREAD QUANTITY PER INCH: 20
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
MATERIAL: COPPER ALLOY 922 OVERALL
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONASTMB584 B143-2A ASSN STD SINGLE MATERIAL RESPONSE OVERALL A
THREAD CLASS2B
THREAD SERIESUNF
THREAD QUANTITY PER INCH20
NOMINAL THREAD SIZE0.438 INCHES IN
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
MATERIALCOPPER ALLOY 922 OVERALL
THREAD DIRECTIONRIGHT-HAND
NUT STYLEHEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
5457Interchangeable
interchangeable cross-reference
interchangeable
08-00669-000Interchangeable
interchangeable cross-reference
interchangeable
123157-214Interchangeable
interchangeable cross-reference
interchangeable
454011Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1683-B ITEM 12?
1683-B ITEM 12 is a NUT,PLAIN,HEXAGON.
What parts can replace 1683-B ITEM 12?
There are 4 known substitutes for 1683-B ITEM 12: 5457, 08-00669-000, 123157-214 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1683-B ITEM 12?
1683-B ITEM 12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-423-0801. 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