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425598 — SCREW,ASSEMBLED WASHER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

425598: SCREW,ASSEMBLED WASHER.

The SCREW,ASSEMBLED WASHER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OR STEEL COMP 1020 OR STEEL COMP 1050 OVERALL, head_style: HEXAGON, head_height: 0.270 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.511 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN, fastener_length: 0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-042-5598, 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
425598
NSN: 5305-00-042-5598
FSC: 5305 — Screws
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OR STEEL COMP 1020 OR STEEL COMP 1050 OVERALL
head_styleHEXAGON
head_height0.270 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
thread_class2A A
thread_length0.511 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
fastener_length0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
washer_quantity1
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OR ZINC OVERALL
width_between_flats0.552 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
internal_drive_styleSLOT
primary_washer_styleFLAT EXTERNAL TEETH
NSN5305-00-042-5598
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 425598 · 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: 0.270 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 1,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL
•
PRIMARY WASHER OUTSIDE DIAMETER: 0.640 INCHES MINIMUM AND 0.660 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.511 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
HEAD STYLE: HEXAGON
•
PRIMARY WASHER STYLE: FLAT EXTERNAL TEETH
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.270 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
FASTENER LENGTH0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 1,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL
PRIMARY WASHER OUTSIDE DIAMETER0.640 INCHES MINIMUM AND 0.660 INCHES MAXIMUM IN
THREAD LENGTH0.511 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD STYLEHEXAGON
PRIMARY WASHER STYLEFLAT EXTERNAL TEETH
THREAD DIRECTIONRIGHT-HAND
PRIMARY WASHER MATERIAL THICKNESS0.032 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES 1
5305000425598Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 425598?
425598 is a SCREW,ASSEMBLED WASHER.
What parts can replace 425598?
There is 1 known substitute for 425598: 5305000425598. Substitute compatibility should be verified for your specific system.
What is the NSN for 425598?
425598 is cataloged in the U.S. Government catalog under NSN 5305-00-042-5598. 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.