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SD30078 — SCREW,CAP,HEXAGON HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

SD30078: SCREW,CAP,HEXAGON HEAD.

The SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: DOUBLE HEXAGON EXTENDED WASHER, head_height: 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.345 INCHES MINIMUM AND 0.365 INCHES MAXIMUM IN, fastener_length: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-076-4898, 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
SD30078
NSN: 5305-01-076-4898
FSC: 5305 — Screws
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleDOUBLE HEXAGON EXTENDED WASHER
head_height0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
thread_class3A A
thread_length0.345 INCHES MINIMUM AND 0.365 INCHES MAXIMUM IN
fastener_length0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentSILVER OVERALL
width_between_flats0.250 INCHES NOMINAL IN
nominal_thread_diameter0.190 INCHES IN
extended_washer_diameter0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
thread_quantity_per_inch32
NSN5305-01-076-4898
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SD30078 · 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
•
EXTENDED WASHER THICKNESS: 0.040 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS2411 FED STD SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.345 INCHES MINIMUM AND 0.365 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: A-57477 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.040 INCHES NOMINAL IN
HEAD HEIGHT0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
FASTENER LENGTH0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS2411 FED STD SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
THREAD LENGTH0.345 INCHES MINIMUM AND 0.365 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONA-57477 FED STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEDOUBLE HEXAGON EXTENDED WASHER
THREAD DIRECTIONRIGHT-HAND
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
3029270Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is SD30078?
SD30078 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace SD30078?
There is 1 known substitute for SD30078: 3029270. Substitute compatibility should be verified for your specific system.
What is the NSN for SD30078?
SD30078 is cataloged in the U.S. Government catalog under NSN 5305-01-076-4898. 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.