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Technical Data Sheet
PartsTable / COMPONENT / 6109D51-12
6109D51-12 ✓ 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 SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON LOCKING FEATURE, head_style: FLAT CHAMFER, head_height: 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN, thread_length: 0.283 INCHES MINIMUM AND 0.375 INCHES MAXIMUM 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 5305-01-058-3885, 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
6109D51-12
NSN: 5305-01-058-3885
FSC: 5305
CAGE: 04804 — NORTHROP GRUMMAN SYSTEMS CORPORATION DIV MARINE SYSTEMS (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON LOCKING FEATURE
head_styleFLAT CHAMFER
head_height0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
thread_length0.283 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
fastener_length0.345 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
hardness_rating80.0 ROCKWELL B MINIMUM OVERALL
locking_featurePELLET OR STRIP THREADS
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE FASTENER
width_across_flats0.156 INCHES MINIMUM AND 0.159 INCHES MAXIMUM IN
NSN5305-01-058-3885
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 6109D51-12 · 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
•
MATERIAL: STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OR STEEL COMP 384 OR STEEL COMP XM-7 FASTENER
•
HEAD DIAMETER: 0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.345 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
THREAD SERIES DESIGNATOR: UNF
•
THREAD QUANTITY PER INCH: 32
•
SPECIFICATION/STANDARD DATA: 80205-NAS1351 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
HARDNESS RATING: 80.0 ROCKWELL B MINIMUM OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OR STEEL COMP 384 OR STEEL COMP XM-7 FASTENER
HEAD DIAMETER0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
FASTENER LENGTH0.345 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORUNF
THREAD QUANTITY PER INCH32
SPECIFICATION/STANDARD DATA80205-NAS1351 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MATERIALPLASTIC POLYAMIDE NYLON LOCKING FEATURE
HARDNESS RATING80.0 ROCKWELL B MINIMUM OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
LOCKING FEATUREPELLET OR STRIP THREADS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
28681Interchangeable
interchangeable cross-reference
interchangeable
20237Interchangeable
interchangeable cross-reference
interchangeable
20235Interchangeable
interchangeable cross-reference
interchangeable
26683Interchangeable
interchangeable cross-reference
interchangeable
32-31465 ITEM 16Interchangeable
Same NIIN cross-reference
interchangeable
5305PL0783063Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6109D51-12?
6109D51-12 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 6109D51-12?
There are 8 known substitutes for 6109D51-12: 28681, 20237, 20235 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6109D51-12?
6109D51-12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-058-3885. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026