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Technical Data Sheet
PartsTable / COMPONENT / 1664346
1664346 ✓ 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 BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.216 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.750 INCHES MINIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-622-4790, 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
1664346
NSN: 5306-00-622-4790
FSC: 5306
CAGE: 12204 — CHRYSLER REALTY COMPANY LLC DBA DAIMLER CHRYSLER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.216 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
thread_class2A A
thread_length0.750 INCHES MINIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length2.000 INCHES NOMINAL IN
shoulder_length0.750 INCHES NOMINAL FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.438 INCHES NOMINAL FIRST SHOULDER IN
width_between_flats0.544 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
nominal_thread_diameter0.375 INCHES IN
NSN5306-00-622-4790
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1664346 · 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
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
MATERIAL: STEEL OVERALL
•
WIDTH BETWEEN FLATS: 0.544 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.750 INCHES NOMINAL FIRST SHOULDER IN
•
SHOULDER DIAMETER: 0.438 INCHES NOMINAL FIRST SHOULDER IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
FASTENER LENGTH: 2.000 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 16
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD DIAMETER0.375 INCHES IN
MATERIALSTEEL OVERALL
WIDTH BETWEEN FLATS0.544 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
SHOULDER LENGTH0.750 INCHES NOMINAL FIRST SHOULDER IN
SHOULDER DIAMETER0.438 INCHES NOMINAL FIRST SHOULDER IN
SHOULDER SHAPEROUND FIRST SHOULDER
FASTENER LENGTH2.000 INCHES NOMINAL IN
THREAD QUANTITY PER INCH16
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
HEAD HEIGHT0.216 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
1340Interchangeable
interchangeable cross-reference
interchangeable
13318Interchangeable
interchangeable cross-reference
interchangeable
11423Interchangeable
interchangeable cross-reference
interchangeable
455Interchangeable
interchangeable cross-reference
interchangeable
6C3/63883Interchangeable
interchangeable cross-reference
interchangeable
91818Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1664346?
1664346 is a BOLT,SHOULDER.
What parts can replace 1664346?
There are 6 known substitutes for 1664346: 1340, 13318, 11423 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1664346?
1664346 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-622-4790. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026