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PartsTable / COMPONENT / FF-S-86 TYPE VIL1
FF-S-86 TYPE VIL1 ✓ 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: NICKEL ALLOY OVERALL, head_style: HEXAGON, head_height: 0.642 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 1.250 INCHES NOMINAL IN, fastener_length: 1.250 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 5305-01-302-5218, 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
FF-S-86 TYPE VIL1
NSN: 5305-01-302-5218
FSC: 5305
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
head_styleHEXAGON
head_height0.642 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN
thread_class3A A
thread_length1.250 INCHES NOMINAL IN
fastener_length1.250 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_across_flats0.500 INCHES NOMINAL IN
width_between_flats1.283 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.625 INCHES IN
minimum_tensile_strength80000 POUNDS PER SQUARE INCH LBS
NSN5305-01-302-5218
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: FF-S-86 TYPE VIL1 · 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 QUANTITY PER INCH: 11
•
CRITICALITY CODE JUSTIFICATION: ZZZX
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
DEPARTURE FROM CITED DESIGNATOR: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
•
WIDTH ACROSS FLATS: 0.500 INCHES NOMINAL IN
•
MATERIAL: NICKEL ALLOY OVERALL
•
FASTENER LENGTH: 1.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH11
CRITICALITY CODE JUSTIFICATIONZZZX
THREAD DIRECTIONRIGHT-HAND
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
DEPARTURE FROM CITED DESIGNATORQUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
WIDTH ACROSS FLATS0.500 INCHES NOMINAL IN
MATERIALNICKEL ALLOY OVERALL
FASTENER LENGTH1.250 INCHES NOMINAL IN
HEAD HEIGHT0.922 INCHES MINIMUM AND 0.928 INCHES MAXIMUM IN
THREAD LENGTH1.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
QQN281CLASSAInterchangeable
interchangeable cross-reference
interchangeable
QQ-N-281Interchangeable
interchangeable cross-reference
interchangeable
B16.1 ANNEALEDInterchangeable
interchangeable cross-reference
interchangeable
B16.1Interchangeable
interchangeable cross-reference
interchangeable
AMS2806BInterchangeable
interchangeable cross-reference
interchangeable
QQ-N-281D CLASS A SPR TMPRInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FF-S-86 TYPE VIL1?
FF-S-86 TYPE VIL1 is a SCREW,CAP,SOCKET HEAD.
What parts can replace FF-S-86 TYPE VIL1?
There are 19 known substitutes for FF-S-86 TYPE VIL1: QQN281CLASSA, QQ-N-281, B16.1 ANNEALED and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FF-S-86 TYPE VIL1?
FF-S-86 TYPE VIL1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-302-5218. 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