PartsTable
Technical Data Sheet
31X30 ✓ 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: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.427 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), special_features: MATL STEEL SAE UNS K05802-B. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-010-2637, 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
31X30
NSN: 5310-00-010-2637
FSC: 5310
CAGE: 83120 — PRESSED METALS OF AMERICA INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.427 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
special_featuresMATL STEEL SAE UNS K05802-B
thread_directionRIGHT-HAND
width_across_flats0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
nominal_thread_size0.500 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch13
nondefinitive_spec/std_data2 TYPE AND 4 STYLE AND 3 TABLE AND 1/2IN. SIZE IN
NSN5310-00-010-2637
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 31X30 · 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
WIDTH ACROSS FLATS: 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
THREAD DIRECTION: RIGHT-HAND
NOMINAL THREAD SIZE: 0.500 INCHES IN
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
THREAD QUANTITY PER INCH: 13
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.500 INCHES IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
THREAD QUANTITY PER INCH13
SPECIAL FEATURESMATL STEEL SAE UNS K05802-B
THREAD CLASS2B
SPECIFICATION/STANDARD DATA81348-FF-N-836 GOVERNMENT SPECIFICATION AND 80204-ANSI B18.2.2 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS35690/CANCELED/ GOVERNMENT STANDARD
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A563,GRADE B ASSN STD SINGLE MATERIAL RESPONSE OR SAE J995,GRADE 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
M425Interchangeable
interchangeable cross-reference
interchangeable
0001201490Interchangeable
interchangeable cross-reference
interchangeable
LENS,M4.25SPH,2BC,71MM DIAInterchangeable
interchangeable cross-reference
interchangeable
09-I-0058Interchangeable
interchangeable cross-reference
interchangeable
355-949-022Interchangeable
interchangeable cross-reference
interchangeable
9158Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31X30?
31X30 is a NUT,PLAIN,HEXAGON.
What parts can replace 31X30?
There are 23 known substitutes for 31X30: M425, 0001201490, LENS,M4.25SPH,2BC,71MM DIA and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 31X30?
31X30 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-010-2637. This indicates validated use in U.S. government and defense supply chains.
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