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8136751 — WASHER,CONCAVE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

8136751: WASHER,CONCAVE.

The WASHER,CONCAVE is a the manufacturer industrial component. Key specifications include radius: 4.921 INCHES NOMINAL IN, material: STEEL OVERALL, recess_depth: 0.062 INCHES NOMINAL IN, hole_diameter: 4.646 INCHES NOMINAL IN, outside_diameter: 6.142 INCHES NOMINAL IN, style_designator: CONCAVE. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-331-2660, 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
8136751
NSN: 5310-00-331-2660
FSC: 5310 — Nuts and Washers
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
radius4.921 INCHES NOMINAL IN
materialSTEEL OVERALL
recess_depth0.062 INCHES NOMINAL IN
hole_diameter4.646 INCHES NOMINAL IN
outside_diameter6.142 INCHES NOMINAL IN
style_designatorCONCAVE
material_thickness0.512 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5310-00-331-2660
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 8136751 · 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
•
RADIUS: 4.921 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CONCAVE
•
OUTSIDE DIAMETER: 6.142 INCHES NOMINAL IN
•
RECESS DEPTH: 0.062 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.512 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 4.646 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
RADIUS4.921 INCHES NOMINAL IN
STYLE DESIGNATORCONCAVE
OUTSIDE DIAMETER6.142 INCHES NOMINAL IN
RECESS DEPTH0.062 INCHES NOMINAL IN
MATERIAL THICKNESS0.512 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
MATERIALSTEEL OVERALL
HOLE DIAMETER4.646 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 1
720USame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 8136751?
8136751 is a WASHER,CONCAVE.
What parts can replace 8136751?
There is 1 known substitute for 8136751: 720U. Substitute compatibility should be verified for your specific system.
What is the NSN for 8136751?
8136751 is cataloged in the U.S. Government catalog under NSN 5310-00-331-2660. 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.