PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 1/2-13UNC-3B (M IL-B-837A GR 2)
1/2-13UNC-3B (M IL-B-837A GR 2) ✓ 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 1/2-13UNC-3B (M IL-B-837A GR 2) is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-450-5130, 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
1/2-13UNC-3B (M IL-B-837A GR 2)
NSN: 5310-01-450-5130
FSC: 5310
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
Part Number1/2-13UNC-3B (M IL-B-837A GR 2)
NSN5310-01-450-5130
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1/2-13UNC-3B (M IL-B-837A GR 2) · 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 DIRECTION: RIGHT-HAND
•
NUT HEIGHT: 0.427 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 3B
•
MATERIAL: STEEL OVERALL
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.427 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD CLASS3B
MATERIALSTEEL OVERALL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE0.500 INCHES IN
THREAD QUANTITY PER INCH13
VERIFIED SUBSTITUTES & CROSS-REFERENCES 29
122-2422417 PC 200Interchangeable
interchangeable cross-reference
interchangeable
122-2298838 PC 200Interchangeable
interchangeable cross-reference
interchangeable
122-2422386 PIEInterchangeable
interchangeable cross-reference
interchangeable
5310PL1368737Interchangeable
interchangeable cross-reference
interchangeable
NAS1149F0663PInterchangeable
interchangeable cross-reference
interchangeable
5310PL1873845Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 1/2-13UNC-3B (M IL-B-837A GR 2)?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 1/2-13UNC-3B (M IL-B-837A GR 2)?
1/2-13UNC-3B (M IL-B-837A GR 2) is a 1/2-13UNC-3B (M IL-B-837A GR 2).
What parts can replace 1/2-13UNC-3B (M IL-B-837A GR 2)?
There are 29 known substitutes for 1/2-13UNC-3B (M IL-B-837A GR 2): 122-2422417 PC 200, 122-2298838 PC 200, 122-2422386 PIE and 26 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1/2-13UNC-3B (M IL-B-837A GR 2)?
1/2-13UNC-3B (M IL-B-837A GR 2) is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-450-5130. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 1/2-13UNC-3B (M IL-B-837A GR 2)

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026