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Technical Data Sheet
PartsTable / COMPONENT / Q1784
Q1784 ✓ 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,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, grip_length: 1.125 INCHES NOMINAL IN, head_height: 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.875 INCHES MINIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-637-9344, 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
Q1784
NSN: 5306-00-637-9344
FSC: 5306
CAGE: 92679 — NAVISTAR INTL CORP MELROSE PARK ENGINE PLANT LOCATION /MELROSE PARK/ (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
grip_length1.125 INCHES NOMINAL IN
head_height0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
thread_class2A A
thread_length0.875 INCHES MINIMUM IN
fastener_length2.000 INCHES NOMINAL IN
hardness_rating23.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
features_providedFINISHED HEAD
width_between_flats0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
nominal_thread_diameter0.312 INCHES IN
minimum_tensile_strength120000 POUNDS PER SQUARE INCH LBS
NSN5306-00-637-9344
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: Q1784 · 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
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL: STEEL OVERALL
•
THREAD CLASS: 2A A
•
WIDTH BETWEEN FLATS: 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.875 INCHES MINIMUM IN
•
HEAD STYLE: HEXAGON
•
FASTENER LENGTH: 2.000 INCHES NOMINAL IN
•
GRIP LENGTH: 1.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MATERIALSTEEL OVERALL
THREAD CLASS2A A
WIDTH BETWEEN FLATS0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
THREAD LENGTH0.875 INCHES MINIMUM IN
HEAD STYLEHEXAGON
FASTENER LENGTH2.000 INCHES NOMINAL IN
GRIP LENGTH1.125 INCHES NOMINAL IN
FEATURES PROVIDEDFINISHED HEAD
HEAD HEIGHT0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
4191AUpgraded Successor
successor cross-reference
successor
0251398Upgraded Successor
successor cross-reference
successor
179826Upgraded Successor
successor cross-reference
successor
23-10744-200Upgraded Successor
successor cross-reference
successor
2CT448Upgraded Successor
successor cross-reference
successor
MS90728-40Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is Q1784?
Q1784 is a BOLT,MACHINE.
What parts can replace Q1784?
There are 10 known substitutes for Q1784: 4191A, 0251398, 179826 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for Q1784?
Q1784 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-637-9344. 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