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20X1806 — BOLT,RIBBED NECK

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

20X1806: BOLT,RIBBED NECK.

The BOLT,RIBBED NECK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: ROOF, rib_length: 0.500 INCHES NOMINAL IN, head_height: 0.340 INCHES NOMINAL IN, rib_quantity: 32, thread_class: 2A A. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-900-5157, 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
20X1806
NSN: 5306-00-900-5157
FSC: 5306 — Bolts
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleROOF
rib_length0.500 INCHES NOMINAL IN
head_height0.340 INCHES NOMINAL IN
rib_quantity32
thread_class2A A
head_diameter1.254 INCHES NOMINAL IN
thread_length1.270 INCHES NOMINAL IN
fastener_length2.410 INCHES NOMINAL IN
thread_directionRIGHT-HAND
rib_included_angle80.0 DEGREES NOMINAL
rib_major_diameter0.814 INCHES NOMINAL IN
NSN5306-00-900-5157
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 20X1806 · 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
•
HEAD HEIGHT: 0.340 INCHES NOMINAL IN
•
RIB INCLUDED ANGLE: 80.0 DEGREES NOMINAL
•
FASTENER LENGTH: 2.410 INCHES NOMINAL IN
•
THREAD LENGTH: 1.270 INCHES NOMINAL IN
•
RIB LENGTH: 0.500 INCHES NOMINAL IN
•
RIB MINOR DIAMETER: 0.780 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
•
HEAD STYLE: ROOF
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.340 INCHES NOMINAL IN
RIB INCLUDED ANGLE80.0 DEGREES NOMINAL
FASTENER LENGTH2.410 INCHES NOMINAL IN
THREAD LENGTH1.270 INCHES NOMINAL IN
RIB LENGTH0.500 INCHES NOMINAL IN
RIB MINOR DIAMETER0.780 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.750 INCHES IN
HEAD STYLEROOF
THREAD DIRECTIONRIGHT-HAND
RIB MAJOR DIAMETER0.814 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES 1
20X592Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 20X1806?
20X1806 is a BOLT,RIBBED NECK.
What parts can replace 20X1806?
There is 1 known substitute for 20X1806: 20X592. Substitute compatibility should be verified for your specific system.
What is the NSN for 20X1806?
20X1806 is cataloged in the U.S. Government catalog under NSN 5306-00-900-5157. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.