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Technical Data Sheet
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J903P31C — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

J903P31C: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 718 OVERALL, head_style: HEXAGON, head_height: 0.134 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.616 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN, surface_finish: 32.0 MICROINCHES THREADS. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-004-6407, 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
J903P31C
NSN: 5306-01-004-6407
FSC: 5306 — Bolts
CAGE: 07482 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
materialNICKEL ALLOY 718 OVERALL
head_styleHEXAGON
head_height0.134 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
thread_class3A A
thread_length0.616 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES THREADS
fastener_length0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
width_between_flats0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
nominal_thread_diameter0.190 INCHES IN
thread_quantity_per_inch32
NSN5306-01-004-6407
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: J903P31C · 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 FINISH: 32.0 MICROINCHES THREADS
•
HEAD HEIGHT: 0.134 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.616 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: INCONEL FSCM 74900 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
FEATURES PROVIDED: FINISHED HEAD
•
HEAD STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES THREADS
HEAD HEIGHT0.134 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
FASTENER LENGTH0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
THREAD LENGTH0.616 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONINCONEL FSCM 74900 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
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 1
5306PL1496312Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is J903P31C?
J903P31C is a BOLT,MACHINE.
What parts can replace J903P31C?
There is 1 known substitute for J903P31C: 5306PL1496312. Substitute compatibility should be verified for your specific system.
What is the NSN for J903P31C?
J903P31C is cataloged in the U.S. Government catalog under NSN 5306-01-004-6407. 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.