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5-13-11178 — WASHER,SEAL

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

5-13-11178: WASHER,SEAL.

The WASHER,SEAL is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 OVERALL, hole_diameter: 0.255 INCHES NOMINAL IN, overall_height: 0.068 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN, hardness_rating: 77.0 ROCKWELL B NOMINAL, outside_diameter: 0.625 INCHES NOMINAL IN, style_designator: CONCAVE. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-723-1817, 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
5-13-11178
NSN: 5310-01-723-1817
FSC: 5310 — Nuts and Washers
CAGE: 81337 — W1D1 NATICK SOLDIER CENTER DBA US ARMY CCDC SOLDIER CENTER DIV COMBAT CAPABILITIES DEVELOPMENT COMMAND - SOLDIER CENTER (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OVERALL
hole_diameter0.255 INCHES NOMINAL IN
overall_height0.068 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
hardness_rating77.0 ROCKWELL B NOMINAL
outside_diameter0.625 INCHES NOMINAL IN
style_designatorCONCAVE
end_item_identification8145-01-659-8110
part_name_assigned_by_controlling_agencyWASHER, SEALING STYLE
NSN5310-01-723-1817
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5-13-11178 · 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
•
HARDNESS RATING: 77.0 ROCKWELL B NOMINAL
•
STYLE DESIGNATOR: CONCAVE
•
OUTSIDE DIAMETER: 0.625 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 316 OVERALL
•
HOLE DIAMETER: 0.255 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.068 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
HARDNESS RATING77.0 ROCKWELL B NOMINAL
STYLE DESIGNATORCONCAVE
OUTSIDE DIAMETER0.625 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER, SEALING STYLE
END ITEM IDENTIFICATION8145-01-659-8110
MATERIALSTEEL COMP 316 OVERALL
HOLE DIAMETER0.255 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 5-13-11178?
5-13-11178 is a WASHER,SEAL.
What is the NSN for 5-13-11178?
5-13-11178 is cataloged in the U.S. Government catalog under NSN 5310-01-723-1817. 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.