PartsTable
Technical Data Sheet

SR0178/4 — SCREW,ASSEMBLED WASHER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

SR0178/4: SCREW,ASSEMBLED WASHER.

The SCREW,ASSEMBLED WASHER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 2A A, thread_direction: RIGHT-HAND, surface_treatment: CADMIUM OR ZINC OVERALL, internal_drive_style: CROSS RECESS TYPE 1, nonstandard_thread_pitch_diameter: +0.1596 TO 0.1629 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-044-3003, 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
SR0178/4
NSN: 5305-01-044-3003
FSC: 5305 — Screws
CAGE: K5070 — DEVONPORT ROYAL DOCKYARD LIMITED, DEVONPORT ROYAL DOCKYARD (GBR)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class2A A
washer_quantity1
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OR ZINC OVERALL
internal_drive_styleCROSS RECESS TYPE 1
nonstandard_thread_pitch_diameter+0.1596 TO 0.1629 INCHES IN
NSN5305-01-044-3003
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SR0178/4 · 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
•
THREAD DIRECTION: RIGHT-HAND
•
NONSTANDARD THREAD PITCH DIAMETER: +0.1596 TO 0.1629 INCHES IN
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
THREAD CLASS: 2A A
•
MATERIAL: STEEL OVERALL
•
WASHER QUANTITY: 1
TECHNICAL CHARACTERISTICS
THREAD DIRECTIONRIGHT-HAND
NONSTANDARD THREAD PITCH DIAMETER+0.1596 TO 0.1629 INCHES IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
THREAD CLASS2A A
MATERIALSTEEL OVERALL
WASHER QUANTITY1
SUBSTITUTES & CROSS-REFERENCES 1
33330Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 SR0178/4?
SR0178/4 is a SCREW,ASSEMBLED WASHER.
What parts can replace SR0178/4?
There is 1 known substitute for SR0178/4: 33330. Substitute compatibility should be verified for your specific system.
What is the NSN for SR0178/4?
SR0178/4 is cataloged in the U.S. Government catalog under NSN 5305-01-044-3003. 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.