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Technical Data Sheet
PartsTable / COMPONENT / GB511GY1
GB511GY1 ✓ 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 COUNTERSUNK, thread_class: 3A A, thread_length: 0.718 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, countersink_angle: 60.0 DEGREES NOMINAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-398-3572, 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
GB511GY1
NSN: 5306-01-398-3572
FSC: 5306
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON COUNTERSUNK
thread_class3A A
thread_length0.718 INCHES NOMINAL IN
thread_directionRIGHT-HAND
countersink_angle60.0 DEGREES NOMINAL
surface_treatmentZINC OVERALL
width_between_flats0.750 INCHES NOMINAL IN
nominal_thread_diameter0.500 INCHES IN
thread_quantity_per_inch20
thread_series_designatorUNF
NSN5306-01-398-3572
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GB511GY1 · 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
•
SURFACE TREATMENT: ZINC OVERALL
•
MATERIAL: STEEL OVERALL
•
THREAD SERIES DESIGNATOR: UNF
•
HEAD STYLE: HEXAGON COUNTERSUNK
•
COUNTERSINK ANGLE: 60.0 DEGREES NOMINAL
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
WIDTH BETWEEN FLATS: 0.750 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTZINC OVERALL
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNF
HEAD STYLEHEXAGON COUNTERSUNK
COUNTERSINK ANGLE60.0 DEGREES NOMINAL
NOMINAL THREAD DIAMETER0.500 INCHES IN
WIDTH BETWEEN FLATS0.750 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS3A A
THREAD QUANTITY PER INCH20
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
01845-1069Interchangeable
interchangeable cross-reference
interchangeable
2592AInterchangeable
interchangeable cross-reference
interchangeable
ME88-2Interchangeable
interchangeable cross-reference
interchangeable
140-1784-03-01-00Interchangeable
interchangeable cross-reference
interchangeable
1131H-CInterchangeable
interchangeable cross-reference
interchangeable
10-402-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GB511GY1?
GB511GY1 is a BOLT,MACHINE.
What parts can replace GB511GY1?
There are 15 known substitutes for GB511GY1: 01845-1069, 2592A, ME88-2 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GB511GY1?
GB511GY1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-398-3572. 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