PartsTable
Technical Data Sheet
37FT1018 ✓ 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,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.379 INCHES MINIMUM AND 0.399 INCHES MAXIMUM IN, lubrication: SOLUBLE LUBRICANT, temp_rating: 450.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-422-0711, 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
37FT1018
NSN: 5310-00-422-0711
FSC: 5310
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.379 INCHES MINIMUM AND 0.399 INCHES MAXIMUM IN
lubricationSOLUBLE LUBRICANT
temp_rating450.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.928 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
nominal_thread_size0.625 INCHES IN
NSN5310-00-422-0711
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 37FT1018 · 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
THREAD CLASS: 3B
SURFACE TREATMENT: CADMIUM OVERALL
NUT HEIGHT: 0.379 INCHES MINIMUM AND 0.399 INCHES MAXIMUM IN
WIDTH ACROSS FLATS: 0.928 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
BEARING SURFACE TYPE: CHAMFERED
NOMINAL THREAD SIZE: 0.625 INCHES IN
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
LUBRICATION: SOLUBLE LUBRICANT
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
SURFACE TREATMENTCADMIUM OVERALL
NUT HEIGHT0.379 INCHES MINIMUM AND 0.399 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.928 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
BEARING SURFACE TYPECHAMFERED
NOMINAL THREAD SIZE0.625 INCHES IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
LUBRICATIONSOLUBLE LUBRICANT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
AMS-QQ-A-200/3Interchangeable
interchangeable cross-reference
interchangeable
LS3489Interchangeable
interchangeable cross-reference
interchangeable
S1125597Interchangeable
interchangeable cross-reference
interchangeable
27-430Interchangeable
interchangeable cross-reference
interchangeable
07-955EInterchangeable
interchangeable cross-reference
interchangeable
07-995EInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 37FT1018?
37FT1018 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 37FT1018?
There are 13 known substitutes for 37FT1018: AMS-QQ-A-200/3, LS3489, S1125597 and 10 more. Substitute compatibility should be verified for your specific system.
Is 37FT1018 still available?
37FT1018 is currently cancelled.
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