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PartsTable / COMPONENT / 37FFHNS
37FFHNS ✓ 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 OVERALL, nut_style: HEXAGON, nut_height: 0.326 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-367-1799, 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
37FFHNS
NSN: 5310-00-367-1799
FSC: 5310
CAGE: 3T063 — MOTOR CITY FASTENERS INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleHEXAGON
nut_height0.326 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats0.560 INCHES NOMINAL IN
nominal_thread_size0.375 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch24
NSN5310-00-367-1799
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 37FFHNS · 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: 0.375 INCHES IN
•
BEARING SURFACE TYPE: CHAMFERED
•
THREAD SERIES: UNF
•
THREAD QUANTITY PER INCH: 24
•
NUT HEIGHT: 0.326 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
MATERIAL: COPPER ALLOY OVERALL
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.375 INCHES IN
BEARING SURFACE TYPECHAMFERED
THREAD SERIESUNF
THREAD QUANTITY PER INCH24
NUT HEIGHT0.326 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
MATERIALCOPPER ALLOY OVERALL
NUT STYLEHEXAGON
THREAD CLASS2B
WIDTH ACROSS FLATS0.560 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
GS514W1BInterchangeable
interchangeable cross-reference
interchangeable
21230Interchangeable
interchangeable cross-reference
interchangeable
A315BInterchangeable
interchangeable cross-reference
interchangeable
7174SRInterchangeable
interchangeable cross-reference
interchangeable
J7174Interchangeable
interchangeable cross-reference
interchangeable
7409886Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 37FFHNS?
37FFHNS is a NUT,PLAIN,HEXAGON.
What parts can replace 37FFHNS?
There are 18 known substitutes for 37FFHNS: GS514W1B, 21230, A315B and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 37FFHNS?
37FFHNS is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-367-1799. 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