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8387787 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

8387787: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, head_height: 0.658 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 2.500 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, width_between_flats: 1.631 INCHES MINIMUM AND 1.688 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-682-0450, 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
8387787
NSN: 5306-01-682-0450
FSC: 5306 — Bolts
CAGE: 39VG9 — PROGRESS RAIL LOCOMOTIVE INC. DBA PROGRESS RAIL SWITCHING SERVICES LLC (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.658 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN
thread_class2A A
thread_length2.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats1.631 INCHES MINIMUM AND 1.688 INCHES MAXIMUM IN
nominal_thread_diameter1.125 INCHES IN
thread_quantity_per_inch12
thread_series_designatorUNF
part_name_assigned_by_controlling_agencyBOLT, HEX
NSN5306-01-682-0450
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8387787 · 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: 0.658 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN
•
THREAD LENGTH: 2.500 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 1.125 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 1.631 INCHES MINIMUM AND 1.688 INCHES MAXIMUM IN
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.658 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN
THREAD LENGTH2.500 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER1.125 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS1.631 INCHES MINIMUM AND 1.688 INCHES MAXIMUM IN
PART NAME ASSIGNED BY CONTROLLING AGENCYBOLT, HEX
THREAD CLASS2A A
THREAD QUANTITY PER INCH12
THREAD SERIES DESIGNATORUNF
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 8387787?
8387787 is a BOLT,MACHINE.
What is the NSN for 8387787?
8387787 is cataloged in the U.S. Government catalog under NSN 5306-01-682-0450. 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.