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Technical Data Sheet
PartsTable / COMPONENT / 66910111-1
66910111-1 ✓ 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 CORROSION RESISTING OVERALL, head_style: FLAT FILLISTER, head_height: 0.138 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.222 INCHES NOMINAL IN, thread_length: 0.267 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 5305-01-386-3756, 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
66910111-1
NSN: 5305-01-386-3756
FSC: 5305
CAGE: 34860 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleFLAT FILLISTER
head_height0.138 INCHES NOMINAL IN
thread_class3A A
head_diameter0.222 INCHES NOMINAL IN
thread_length0.267 INCHES NOMINAL IN
surface_finish125.0 MICROINCHES OVERALL
fastener_length0.438 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_across_flats0.110 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.138 INCHES IN
NSN5305-01-386-3756
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 66910111-1 · 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 STYLE: FLAT FILLISTER
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
THREAD SERIES DESIGNATOR: UNRC
•
SURFACE FINISH: 125.0 MICROINCHES OVERALL
•
FASTENER LENGTH: 0.438 INCHES NOMINAL IN
•
HEAD DIAMETER: 0.222 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.138 INCHES NOMINAL IN
•
THREAD CLASS: 3A A
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEFLAT FILLISTER
MATERIALSTEEL CORROSION RESISTING OVERALL
THREAD SERIES DESIGNATORUNRC
SURFACE FINISH125.0 MICROINCHES OVERALL
FASTENER LENGTH0.438 INCHES NOMINAL IN
HEAD DIAMETER0.222 INCHES NOMINAL IN
HEAD HEIGHT0.138 INCHES NOMINAL IN
THREAD CLASS3A A
INTERNAL DRIVE STYLEHEXAGON
THREAD QUANTITY PER INCH32
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
NAS1352C06-6Interchangeable
interchangeable cross-reference
interchangeable
103A10014-19Interchangeable
interchangeable cross-reference
interchangeable
8635-1405-00Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 66910111-1?
66910111-1 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 66910111-1?
There are 3 known substitutes for 66910111-1: NAS1352C06-6, 103A10014-19, 8635-1405-00. Substitute compatibility should be verified for your specific system.
What is the NSN for 66910111-1?
66910111-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-386-3756. 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