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PartsTable / COMPONENT / 1/2-13UNC-2B ASTM-A194 GRADE 7
1/2-13UNC-2B ASTM-A194 GRADE 7 ✓ 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-2B ASTM-A194 GRADE 7 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-144-3917, 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-2B ASTM-A194 GRADE 7
NSN: 5310-01-144-3917
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part Number1/2-13UNC-2B ASTM-A194 GRADE 7
NSN5310-01-144-3917
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1/2-13UNC-2B ASTM-A194 GRADE 7 · 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
•
CRITICALITY CODE JUSTIFICATION: ZZZYZZZY
•
BEARING SURFACE TYPE: FLATFLAT
•
NOMINAL THREAD SIZE: 0.500 INCHES0.500 INCHES IN
•
THREAD QUANTITY PER INCH: 1313
•
THREAD SERIES: ACMEACME
•
NUT STYLE: HEXAGONHEXAGON
•
THREAD DIRECTION: RIGHT-HANDRIGHT-HAND
•
THREAD CLASS: 2A2A
TECHNICAL CHARACTERISTICS (FLIS)
CRITICALITY CODE JUSTIFICATIONZZZYZZZY
BEARING SURFACE TYPEFLATFLAT
NOMINAL THREAD SIZE0.500 INCHES0.500 INCHES IN
THREAD QUANTITY PER INCH1313
THREAD SERIESACMEACME
NUT STYLEHEXAGONHEXAGON
THREAD DIRECTIONRIGHT-HANDRIGHT-HAND
THREAD CLASS2A2A
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMSMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A-194,CL 2H ASSN STD SINGLE MATERIAL RESPONSE OVERALLASTM A-194,CL 2H ASSN STD SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 34
5/8-11UNC-2A X 4 1/2 INCHESL1Interchangeable
interchangeable cross-reference
interchangeable
QQ-N-281 GRADE 400, CLASS AInterchangeable
interchangeable cross-reference
interchangeable
5/8-11UNC-2A X 4 1/2 INCHESInterchangeable
interchangeable cross-reference
interchangeable
501-4675682 ITEM 4Interchangeable
interchangeable cross-reference
interchangeable
501-4675682 ITEM 4L1Interchangeable
interchangeable cross-reference
interchangeable
1.500-06UNC-2A X 5.000L1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1/2-13UNC-2B ASTM-A194 GRADE 7?
1/2-13UNC-2B ASTM-A194 GRADE 7 is a 1/2-13UNC-2B ASTM-A194 GRADE 7.
What parts can replace 1/2-13UNC-2B ASTM-A194 GRADE 7?
There are 34 known substitutes for 1/2-13UNC-2B ASTM-A194 GRADE 7: 5/8-11UNC-2A X 4 1/2 INCHESL1, QQ-N-281 GRADE 400, CLASS A, 5/8-11UNC-2A X 4 1/2 INCHES and 31 more. Substitute compatibility should be verified for your specific system.
Is 1/2-13UNC-2B ASTM-A194 GRADE 7 still available?
1/2-13UNC-2B ASTM-A194 GRADE 7 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026