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Technical Data Sheet
PartsTable / COMPONENT / HB1/4-28X5/8G5ZP
HB1/4-28X5/8G5ZP ✓ 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 HB1/4-28X5/8G5ZP is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-626-1845, 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
HB1/4-28X5/8G5ZP
NSN: 5305-01-626-1845
FSC: 5305
CAGE: 52793 — SAGINAW PRODUCTS CORPORATION DBA CIGNYS (USA)
SPECIFICATIONS
Part NumberHB1/4-28X5/8G5ZP
NSN5305-01-626-1845
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: HB1/4-28X5/8G5ZP · 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 STYLE: HEXAGON
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
THREAD QUANTITY PER INCH: 20
•
FASTENER LENGTH: 0.625 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEHEXAGON
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
PART NAME ASSIGNED BY CONTROLLING AGENCYBOLT, HEX HEAD, 1/4-20 X 5/8LG
THREAD QUANTITY PER INCH20
FASTENER LENGTH0.625 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
THREAD DIRECTIONRIGHT-HAND
END ITEM IDENTIFICATIONTRAILER, MUNITIONS A/M32K-10
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
6024Interchangeable
interchangeable cross-reference
interchangeable
MS90725-5Interchangeable
interchangeable cross-reference
interchangeable
1-4-20X5-8Interchangeable
interchangeable cross-reference
interchangeable
1/4-20 X 5/8Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HB1/4-28X5/8G5ZP?
HB1/4-28X5/8G5ZP is a HB1/4-28X5/8G5ZP.
What parts can replace HB1/4-28X5/8G5ZP?
There are 4 known substitutes for HB1/4-28X5/8G5ZP: 6024, MS90725-5, 1-4-20X5-8 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HB1/4-28X5/8G5ZP?
HB1/4-28X5/8G5ZP is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-626-1845. 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