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Technical Data Sheet
PartsTable / COMPONENT / C9851-12
C9851-12 ✓ 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, hole_type: DRILLED, grip_length: 2.188 INCHES NOMINAL IN, thread_class: 3A A, hole_diameter: 0.055 INCHES NOMINAL IN, thread_length: 1.188 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-055-7735, 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
C9851-12
NSN: 5306-01-055-7735
FSC: 5306
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_typeDRILLED
grip_length2.188 INCHES NOMINAL IN
thread_class3A A
hole_diameter0.055 INCHES NOMINAL IN
hole_quantity4
thread_length1.188 INCHES NOMINAL IN
fastener_length3.361 INCHES MINIMUM AND 3.391 INCHES MAXIMUM IN
hardness_rating46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
nominal_thread_diameter0.750 INCHES IN
NSN5306-01-055-7735
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: C9851-12 · 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
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF)
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
HARDNESS RATING: 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
•
HOLE CONFIGURATION STYLE: ROUND
•
THREAD LENGTH: 1.188 INCHES NOMINAL IN
•
FASTENER LENGTH: 3.361 INCHES MINIMUM AND 3.391 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.055 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF)
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OVERALL
HARDNESS RATING46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
HOLE CONFIGURATION STYLEROUND
THREAD LENGTH1.188 INCHES NOMINAL IN
FASTENER LENGTH3.361 INCHES MINIMUM AND 3.391 INCHES MAXIMUM IN
HOLE DIAMETER0.055 INCHES NOMINAL IN
GRIP LENGTH2.188 INCHES NOMINAL IN
THREAD CLASS3A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
FFB571TYPEB2Upgraded Successor
successor cross-reference
successor
122138Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C9851-12?
C9851-12 is a BOLT,MACHINE.
What parts can replace C9851-12?
There are 2 known substitutes for C9851-12: FFB571TYPEB2, 122138. Substitute compatibility should be verified for your specific system.
What is the NSN for C9851-12?
C9851-12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-055-7735. 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