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330-1666-020 — SETSCREW

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

330-1666-020: SETSCREW.

The SETSCREW is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 316 OVERALL, head_style: HEADLESS (SETSCREW), point_style: FLAT, thread_class: 3A A, thread_length: 0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN, fastener_length: 0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-078-2916, 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
330-1666-020
NSN: 5305-01-078-2916
FSC: 5305 — Screws
CAGE: 70318 — ALLMETAL SCREW PRODUCTS CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 316 OVERALL
head_styleHEADLESS (SETSCREW)
point_styleFLAT
thread_class3A A
thread_length0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
fastener_length0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.062 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.125 INCHES IN
thread_quantity_per_inch40
NSN5305-01-078-2916
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 330-1666-020 · 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: 0.062 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
NOMINAL THREAD DIAMETER: 0.125 INCHES IN
•
HEAD STYLE: HEADLESS (SETSCREW)
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.062 INCHES NOMINAL IN
FASTENER LENGTH0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
NOMINAL THREAD DIAMETER0.125 INCHES IN
HEAD STYLEHEADLESS (SETSCREW)
THREAD DIRECTIONRIGHT-HAND
POINT STYLEFLAT
SURFACE TREATMENTPASSIVATE OVERALL
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES 1
5-40X3-32Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 330-1666-020?
330-1666-020 is a SETSCREW.
What parts can replace 330-1666-020?
There is 1 known substitute for 330-1666-020: 5-40X3-32. Substitute compatibility should be verified for your specific system.
What is the NSN for 330-1666-020?
330-1666-020 is cataloged in the U.S. Government catalog under NSN 5305-01-078-2916. 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.