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66-D-1751-9 — SET SCREW SOCKETHEA

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

66-D-1751-9: SET SCREW SOCKETHEA.

The SET SCREW SOCKETHEA is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON LOCKING FEATURE, head_style: HEADLESS (SETSCREW), point_style: FLAT, thread_class: 2A A, fastener_length: 0.750 INCHES NOMINAL IN, locking_feature: PATCH OR PELLET OR STRIP THREADS. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-280-5711, 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
66-D-1751-9
NSN: 5305-01-280-5711
NIINs: 012805711, 013090606
FSC: 5305 — Screws
CAGE: 98750 — SAN ANTONIO AIR LOGISTICS CENTER (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON LOCKING FEATURE
head_styleHEADLESS (SETSCREW)
point_styleFLAT
thread_class2A A
fastener_length0.750 INCHES NOMINAL IN
locking_featurePATCH OR PELLET OR STRIP THREADS
thread_directionRIGHT-HAND
surface_treatmentCADMIUM FASTENER
width_across_flats0.156 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.312 INCHES IN
thread_quantity_per_inch18
NSN5305-01-280-5711
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 66-D-1751-9 · 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: 0.156 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.750 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
HEAD STYLE: HEADLESS (SETSCREW)
•
THREAD DIRECTION: RIGHT-HAND
•
POINT STYLE: FLAT
•
LOCKING FEATURE: PATCH OR PELLET OR STRIP THREADS
•
SURFACE TREATMENT: CADMIUM FASTENER
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.156 INCHES NOMINAL IN
FASTENER LENGTH0.750 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEHEADLESS (SETSCREW)
THREAD DIRECTIONRIGHT-HAND
POINT STYLEFLAT
LOCKING FEATUREPATCH OR PELLET OR STRIP THREADS
SURFACE TREATMENTCADMIUM FASTENER
INTERNAL DRIVE STYLEHEXAGON
THREAD CLASS2A A
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 66-D-1751-9?
66-D-1751-9 is a SET SCREW SOCKETHEA.
What is the NSN for 66-D-1751-9?
66-D-1751-9 is cataloged in the U.S. Government catalog under NSN 5305-01-280-5711. 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.