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PartsTable / COMPONENT / 1840633
1840633 ✓ 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 SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: BUTTON, head_height: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, thread_length: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN, fastener_length: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM 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 5305-00-423-4909, 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
1840633
NSN: 5305-00-423-4909
FSC: 5305
CAGE: 30379 — EUCLID INC (USA)
SPECIFICATIONS
head_styleBUTTON
head_height0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
thread_length0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
fastener_length0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
internal_drive_styleSLOT
nominal_thread_diameter0.138 INCHES IN
thread_quantity_per_inch32
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-00-423-4909
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1840633 · 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
•
INTERNAL DRIVE STYLE: SLOT
•
HEAD HEIGHT: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
FASTENER LENGTH: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
•
THREAD CLASS: 2A A
•
HEAD DIAMETER: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
•
THREAD QUANTITY PER INCH: 32
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL DRIVE STYLESLOT
HEAD HEIGHT0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
FASTENER LENGTH0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
THREAD CLASS2A A
HEAD DIAMETER0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH32
NOMINAL THREAD DIAMETER0.138 INCHES IN
THREAD LENGTH0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
HEAD STYLEBUTTON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
72036Interchangeable
interchangeable cross-reference
interchangeable
2723-38Interchangeable
interchangeable cross-reference
interchangeable
8305-38Interchangeable
interchangeable cross-reference
interchangeable
23059Interchangeable
interchangeable cross-reference
interchangeable
PWA52645-3Interchangeable
interchangeable cross-reference
interchangeable
0-102-47264 ITEM V222Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1840633?
1840633 is a SCREW,MACHINE.
What parts can replace 1840633?
There are 8 known substitutes for 1840633: 72036, 2723-38, 8305-38 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1840633?
1840633 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-423-4909. 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