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1974AS178-001 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1974AS178-001: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: SQUARE, head_height: 0.090 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.145 INCHES NOMINAL IN, shoulder_shape: SQUARE ALL SHOULDERS. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-368-5646, 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
1974AS178-001
NSN: 5305-01-368-5646
FSC: 5305 — Screws
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleSQUARE
head_height0.090 INCHES NOMINAL IN
thread_class2A A
thread_length0.145 INCHES NOMINAL IN
shoulder_shapeSQUARE ALL SHOULDERS
fastener_length0.280 INCHES NOMINAL IN
shoulder_length0.075 INCHES NOMINAL ALL SHOULDERS IN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_between_flats0.280 INCHES NOMINAL IN
internal_drive_styleCROSS RECESS TYPE 1
NSN5305-01-368-5646
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1974AS178-001 · 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: 0.090 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.280 INCHES NOMINAL IN
•
SHOULDER LENGTH: 0.075 INCHES NOMINAL ALL SHOULDERS IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.145 INCHES NOMINAL IN
•
SHOULDER SHAPE: SQUARE ALL SHOULDERS
•
NOMINAL THREAD DIAMETER: 0.086 INCHES IN
•
HEAD STYLE: SQUARE
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.090 INCHES NOMINAL IN
FASTENER LENGTH0.280 INCHES NOMINAL IN
SHOULDER LENGTH0.075 INCHES NOMINAL ALL SHOULDERS IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OVERALL
THREAD LENGTH0.145 INCHES NOMINAL IN
SHOULDER SHAPESQUARE ALL SHOULDERS
NOMINAL THREAD DIAMETER0.086 INCHES IN
HEAD STYLESQUARE
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.280 INCHES NOMINAL IN
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

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 1974AS178-001?
1974AS178-001 is a SCREW,SHOULDER.
What is the NSN for 1974AS178-001?
1974AS178-001 is cataloged in the U.S. Government catalog under NSN 5305-01-368-5646. 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.