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Technical Data Sheet
PartsTable / COMPONENT / 3/8-16UNC
3/8-16UNC ✓ 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 3/8-16UNC is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-297-8833, 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
3/8-16UNC
NSN: 5310-00-297-8833
FSC: 5310
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
Part Number3/8-16UNC
NSN5310-00-297-8833
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3/8-16UNC · 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
•
NUT HEIGHT: 0.216 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.669 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN
•
THREAD CLASS: 3B
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD QUANTITY PER INCH: 16
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
NUT HEIGHT0.216 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.669 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN
THREAD CLASS3B
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH16
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE0.375 INCHES IN
THREAD DIRECTIONRIGHT-HAND
NUT STYLEHEXAGON
MATERIALNICKEL ALLOY R-405 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
1214-3Interchangeable
interchangeable cross-reference
interchangeable
6054-188Interchangeable
interchangeable cross-reference
interchangeable
607109-1Interchangeable
interchangeable cross-reference
interchangeable
MIL-PRF-25567Interchangeable
interchangeable cross-reference
interchangeable
MILB857TYPE4STYLEA0RBInterchangeable
interchangeable cross-reference
interchangeable
43N3934-10Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3/8-16UNC?
3/8-16UNC is a 3/8-16UNC.
What parts can replace 3/8-16UNC?
There are 16 known substitutes for 3/8-16UNC: 1214-3, 6054-188, 607109-1 and 13 more. Substitute compatibility should be verified for your specific system.
Is 3/8-16UNC still available?
3/8-16UNC is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026