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 IN-16UNC-2B 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 5310-01-343-8334, 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 IN-16UNC-2B
NSN:5310-01-343-8334 FSC:5310 CAGE:81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part Number
3/8 IN-16UNC-2B
NSN
5310-01-343-8334
COMPONENT DIAGRAM
KEY FEATURES
•
NONDEFINITIVE SPEC/STD DATA: 5 GRADE
•
WIDTH ACROSS FLATS: 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
•
NUT STYLE: HEXAGON
•
NUT HEIGHT: 0.320 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
THREAD QUANTITY PER INCH: 16
•
HARDNESS RATING: 23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA
5 GRADE
WIDTH ACROSS FLATS
0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
NUT STYLE
HEXAGON
NUT HEIGHT
0.320 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN
BEARING SURFACE TYPE
CHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE
0.375 INCHES IN
THREAD QUANTITY PER INCH
16
HARDNESS RATING
23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
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FREQUENTLY ASKED QUESTIONS
What is 3/8 IN-16UNC-2B?
3/8 IN-16UNC-2B is a 3/8 IN-16UNC-2B.
What parts can replace 3/8 IN-16UNC-2B?
There are 25 known substitutes for 3/8 IN-16UNC-2B: 122-2422417 PC 200, 122-2298838 PC 200, 122-2422386 PIE and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3/8 IN-16UNC-2B?
3/8 IN-16UNC-2B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-343-8334. This indicates validated use in U.S. government and defense supply chains.
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