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FF-S-86E TYPE 4 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

FF-S-86E TYPE 4: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 400 OVERALL, head_style: FLAT COUNTERSUNK, head_height: 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.872 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN, thread_length: 0.930 INCHES MINIMUM AND 1.124 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-639-1383, 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-86E TYPE 4
NSN: 5305-00-639-1383
NIINs: 006391383, 012921386, 013015976
FSC: 5305 — Screws
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400 OVERALL
head_styleFLAT COUNTERSUNK
head_height0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.872 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN
thread_length0.930 INCHES MINIMUM AND 1.124 INCHES MAXIMUM IN
fastener_length1.335 INCHES MINIMUM AND 1.375 INCHES MAXIMUM IN
hardness_rating95.0 ROCKWELL B NOMINAL OVERALL
locking_featurePELLET OR STRIP OR PATCH THREADS
thread_directionRIGHT-HAND
countersink_angle82.0 DEGREES NOMINAL
width_across_flats0.312 INCHES NOMINAL IN
NSN5305-00-639-1383
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: FF-S-86E TYPE 4 · 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
•
WIDTH ACROSS FLATS: 0.094 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.500 INCHES NOMINAL IN
•
THREAD LENGTH: 0.500 INCHES MINIMUM IN
•
HARDNESS RATING: 95.0 ROCKWELL B NOMINAL OVERALL
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.094 INCHES NOMINAL IN
HEAD HEIGHT0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN
FASTENER LENGTH0.500 INCHES NOMINAL IN
THREAD LENGTH0.500 INCHES MINIMUM IN
HARDNESS RATING95.0 ROCKWELL B NOMINAL OVERALL
NOMINAL THREAD DIAMETER0.138 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
MINIMUM TENSILE STRENGTH100000 POUNDS PER SQUARE INCH LBS
INTERNAL DRIVE STYLEHEXAGON
SUBSTITUTES & CROSS-REFERENCES 1
90545Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is FF-S-86E TYPE 4?
FF-S-86E TYPE 4 is a SCREW,CAP,SOCKET HEAD.
What parts can replace FF-S-86E TYPE 4?
There is 1 known substitute for FF-S-86E TYPE 4: 90545. Substitute compatibility should be verified for your specific system.
What is the NSN for FF-S-86E TYPE 4?
FF-S-86E TYPE 4 is cataloged in the U.S. Government catalog under NSN 5305-00-639-1383. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.