PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 179821
179821 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The NUT,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, nut_style: TUBE COUPLING, nut_height: 1.040 INCHES MINIMUM AND 1.060 INCHES MAXIMUM IN, seat_angle: 45.00 DEGREES NOMINAL, thread_series: UNS, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-018-0082, 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
179821
NSN: 5306-00-018-0082
FSC: 5306
CAGE: 31007 — NAVISTAR INTERNATIONAL CORPORATION DBA NAVISTAR (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
nut_styleTUBE COUPLING
nut_height1.040 INCHES MINIMUM AND 1.060 INCHES MAXIMUM IN
seat_angle45.00 DEGREES NOMINAL
thread_seriesUNS
thread_directionRIGHT-HAND
length_to_shoulder0.860 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
width_across_flats1.356 INCHES MINIMUM AND 1.377 INCHES MAXIMUM IN
nominal_thread_size1.187 INCHES IN
thread_pitch_diameters+1.1460 TO 1.1507 INCHES IN
smallest_inside_diameter0.860 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
thread_quantity_per_inch16
NSN5306-00-018-0082
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 179821 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH BETWEEN FLATS: 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
HEAD STYLE: HEXAGON
•
HEAD HEIGHT: 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
THREAD LENGTH: 0.875 INCHES MINIMUM IN
•
HARDNESS RATING: 23.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
•
DEPARTURE FROM CITED DESIGNATOR: AS MODIFIED BY FASTENER LENGTH
•
FEATURES PROVIDED: FINISHED HEAD
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH BETWEEN FLATS0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
HEAD STYLEHEXAGON
HEAD HEIGHT0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD LENGTH0.875 INCHES MINIMUM IN
HARDNESS RATING23.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY FASTENER LENGTH
FEATURES PROVIDEDFINISHED HEAD
SURFACE TREATMENTCADMIUM AND CHROMATE OR ZINC AND CHROMATE OVERALL
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
179821Interchangeable
interchangeable cross-reference
interchangeable
10082447Interchangeable
interchangeable cross-reference
interchangeable
B1821BH031C138NInterchangeable
interchangeable cross-reference
interchangeable
180082Interchangeable
interchangeable cross-reference
interchangeable
6599Interchangeable
interchangeable cross-reference
interchangeable
X6599Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 179821?
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 179821?
179821 is a NUT,TUBE COUPLING.
What parts can replace 179821?
There are 13 known substitutes for 179821: 179821, 10082447, B1821BH031C138N and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 179821?
179821 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-018-0082. 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 — 179821

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