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NWC78A339 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

NWC78A339: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 630 OVERALL, recess_angle: 52.0 DEGREES NOMINAL, hole_diameter: 0.500 INCHES NOMINAL IN, surface_finish: 32.0 MICROINCHES COUNTERBORE WALL, recess_diameter: 0.562 INCHES NOMINAL IN, outside_diameter: 1.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-248-7072, 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
NWC78A339
NSN: 5310-01-248-7072
FSC: 5310 — Nuts and Washers
CAGE: 12934 — NAVAL AIR WARFARE CENTER WEAPONS DIV (USA)
SPECIFICATIONS
materialSTEEL COMP 630 OVERALL
recess_angle52.0 DEGREES NOMINAL
hole_diameter0.500 INCHES NOMINAL IN
surface_finish32.0 MICROINCHES COUNTERBORE WALL
recess_diameter0.562 INCHES NOMINAL IN
outside_diameter1.000 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
material_thickness0.125 INCHES NOMINAL IN
material_document_and_classificationAMS 5643,COND H1100 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
surface_treatment_document_and_classificationQQ-P-35,TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-248-7072
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: NWC78A339 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE FINISH: 32.0 MICROINCHES COUNTERBORE WALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35,TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643,COND H1100 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.000 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.125 INCHES NOMINAL IN
•
RECESS DIAMETER: 0.562 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES COUNTERBORE WALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35,TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643,COND H1100 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.000 INCHES NOMINAL IN
MATERIAL THICKNESS0.125 INCHES NOMINAL IN
RECESS DIAMETER0.562 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
MATERIALSTEEL COMP 630 OVERALL
HOLE DIAMETER0.500 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
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 NWC78A339?
NWC78A339 is a WASHER,RECESSED.
What is the NSN for NWC78A339?
NWC78A339 is cataloged in the U.S. Government catalog under NSN 5310-01-248-7072. 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.