PartsTable
Technical Data Sheet
H19942-6 ✓ 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

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL COMP 4340 OVERALL, nut_style: DOUBLE HEXAGON, lubrication: DRY FILM LUBRICANT, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), overall_height: 0.428 INCHES MINIMUM AND 0.458 INCHES MAXIMUM 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 5310-00-931-8546, 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
H19942-6
NSN: 5310-00-931-8546
FSC: 5310
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 4340 OVERALL
nut_styleDOUBLE HEXAGON
lubricationDRY FILM LUBRICANT
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
overall_height0.428 INCHES MINIMUM AND 0.458 INCHES MAXIMUM IN
hardness_rating38.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
washer_thickness0.070 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
width_across_flats0.424 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
NSN5310-00-931-8546
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: H19942-6 · 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 QUANTITY PER INCH: 24
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
MATERIAL: STEEL COMP 4340 OVERALL
HARDNESS RATING: 38.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
NOMINAL THREAD SIZE: 0.375 INCHES IN
SURFACE TREATMENT: CADMIUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6415 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH24
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
MATERIALSTEEL COMP 4340 OVERALL
HARDNESS RATING38.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
NOMINAL THREAD SIZE0.375 INCHES IN
SURFACE TREATMENTCADMIUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6415 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
OVERALL HEIGHT0.428 INCHES MINIMUM AND 0.458 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
MS21153-4GInterchangeable
interchangeable cross-reference
interchangeable
L2088598-2Interchangeable
interchangeable cross-reference
interchangeable
AN951RE3FL4MILG3278Interchangeable
interchangeable cross-reference
interchangeable
502094Interchangeable
interchangeable cross-reference
interchangeable
502092Interchangeable
interchangeable cross-reference
interchangeable
502091Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H19942-6?
H19942-6 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace H19942-6?
There are 7 known substitutes for H19942-6: MS21153-4G, L2088598-2, AN951RE3FL4MILG3278 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H19942-6?
H19942-6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-931-8546. This indicates validated use in U.S. government and defense supply chains.
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