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FFT305A — THUMBSCREW

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

FFT305A: THUMBSCREW.

The THUMBSCREW is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: THUMB NO. 4, head_height: 0.469 INCHES MINIMUM IN, point_style: FLAT, thread_class: 2A A, thread_length: 0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN.

This part is cataloged in the U.S. Government catalog under NSN 5305-00-263-3585, 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
FFT305A
NSN: 5305-00-263-3585
NIINs: 002633585, 002633586, 004080030
FSC: 5305 — Screws
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleTHUMB NO. 4
head_height0.469 INCHES MINIMUM IN
point_styleFLAT
thread_class2A A
thread_length0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
fastener_length0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
special_featuresALTERED ITEM-MAKE FROM MS21316-56
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_between_flats0.688 INCHES MINIMUM IN
nominal_thread_diameter0.250 INCHES IN
NSN5305-00-263-3585
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: FFT305A · 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 HEIGHT: 0.605 INCHES MINIMUM IN
•
FASTENER LENGTH: 0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
HEAD STYLE: THUMB NO. 4
•
THREAD DIRECTION: RIGHT-HAND
•
POINT STYLE: OVAL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.605 INCHES MINIMUM IN
FASTENER LENGTH0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLETHUMB NO. 4
THREAD DIRECTIONRIGHT-HAND
POINT STYLEOVAL
WIDTH BETWEEN FLATS0.844 INCHES MINIMUM IN
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 4 STYLE
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is FFT305A?
FFT305A is a THUMBSCREW.
What is the NSN for FFT305A?
FFT305A is cataloged in the U.S. Government catalog under NSN 5305-00-263-3585. 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.