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Technical Data Sheet
PartsTable / COMPONENT / 11662878-85
11662878-85 ✓ 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: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 0.306 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.457 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN, thread_length: 1.094 INCHES MINIMUM AND 1.434 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 5305-00-184-2667, 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
11662878-85
NSN: 5305-00-184-2667
FSC: 5305
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.306 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.457 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
thread_length1.094 INCHES MINIMUM AND 1.434 INCHES MAXIMUM IN
fastener_length2.219 INCHES MINIMUM AND 2.281 INCHES MAXIMUM IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
locking_featurePATCH THREADS
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.250 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
NSN5305-00-184-2667
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 11662878-85 · 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 TREATMENT: CADMIUM AND CHROMATE OVERALL
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
THREAD QUANTITY PER INCH: 18
•
WIDTH ACROSS FLATS: 0.250 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
•
MINIMUM YIELD STRENGTH: 130000 POUNDS PER SQUARE INCH LBS
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
•
LOCKING FEATURE: PATCH THREADS
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
NOMINAL THREAD DIAMETER0.312 INCHES IN
THREAD QUANTITY PER INCH18
WIDTH ACROSS FLATS0.250 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN
MINIMUM YIELD STRENGTH130000 POUNDS PER SQUARE INCH LBS
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
LOCKING FEATUREPATCH THREADS
THREAD DIRECTIONRIGHT-HAND
HEAD HEIGHT0.306 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
HEAD STYLEFLAT CHAMFER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
MIL-F-18240EInterchangeable
interchangeable cross-reference
interchangeable
NK515-8R16Interchangeable
interchangeable cross-reference
interchangeable
LL35275-218Interchangeable
interchangeable cross-reference
interchangeable
FFS86Interchangeable
interchangeable cross-reference
interchangeable
MS21262-60Interchangeable
interchangeable cross-reference
interchangeable
NAS1189-08P4LInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 11662878-85?
11662878-85 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 11662878-85?
There are 17 known substitutes for 11662878-85: MIL-F-18240E, NK515-8R16, LL35275-218 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 11662878-85?
11662878-85 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-184-2667. 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