Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW
The B18.2.1 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-019-0882, 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
B18.2.1
NSN:5306-00-019-0882 FSC:5306 CAGE:80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)
SPECIFICATIONS
Part Number
B18.2.1
NSN
5306-00-019-0882
COMPONENT DIAGRAM
KEY FEATURES
•
FASTENER LENGTH: 3.000 INCHES NOMINAL IN
•
THREAD LENGTH: 1.000 INCHES MINIMUM IN
•
WIDTH BETWEEN FLATS: 0.544 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE J429 TY2CL3 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
MINIMUM TENSILE STRENGTH: 60000 POUNDS PER SQUARE INCH LBS
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH
3.000 INCHES NOMINAL IN
THREAD LENGTH
1.000 INCHES MINIMUM IN
WIDTH BETWEEN FLATS
0.544 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER
0.375 INCHES IN
THREAD SERIES DESIGNATOR
UNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATION
SAE J429 TY2CL3 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION
ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL