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Technical Data Sheet
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GYS187-80 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

GYS187-80: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: DOUBLE HEXAGON, grip_length: 5.000 INCHES NOMINAL IN, head_height: 0.257 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 0.812 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-069-0488, 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
GYS187-80
NSN: 5306-01-069-0488
FSC: 5306 — Bolts
CAGE: 0B9R9 — MEGGITT AIRCRAFT BRAKING SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleDOUBLE HEXAGON
grip_length5.000 INCHES NOMINAL IN
head_height0.257 INCHES NOMINAL IN
thread_class3A A
thread_length0.812 INCHES NOMINAL IN
fastener_length5.812 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentPHOSPHATE OVERALL
width_between_flats0.678 INCHES NOMINAL IN
nominal_thread_diameter0.438 INCHES IN
thread_quantity_per_inch20
NSN5306-01-069-0488
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: GYS187-80 · 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 HEIGHT: 0.257 INCHES NOMINAL IN
•
FASTENER LENGTH: 5.812 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: PARKERIZE,FSCM 45738 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.812 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.438 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
GRIP LENGTH: 5.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.257 INCHES NOMINAL IN
FASTENER LENGTH5.812 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONPARKERIZE,FSCM 45738 MFR REF SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.812 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.438 INCHES IN
HEAD STYLEDOUBLE HEXAGON
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH5.000 INCHES NOMINAL IN
WIDTH BETWEEN FLATS0.678 INCHES NOMINAL IN
SURFACE TREATMENTPHOSPHATE OVERALL
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GYS187-80?
GYS187-80 is a BOLT,MACHINE.
What is the NSN for GYS187-80?
GYS187-80 is cataloged in the U.S. Government catalog under NSN 5306-01-069-0488. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.