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12570970 — WASHER,CONCAVE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12570970: WASHER,CONCAVE.

The WASHER,CONCAVE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, hole_diameter: 1.516 INCHES MINIMUM AND 1.576 INCHES MAXIMUM IN, recess_diameter: 2.31 INCHES NOMINAL IN, outside_diameter: 2.75 INCHES NOMINAL IN, style_designator: RECESSED, material_thickness: 0.501 INCHES MINIMUM AND 0.561 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-629-6150, 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
12570970
NSN: 5310-01-629-6150
FSC: 5310 — Nuts and Washers
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
hole_diameter1.516 INCHES MINIMUM AND 1.576 INCHES MAXIMUM IN
recess_diameter2.31 INCHES NOMINAL IN
outside_diameter2.75 INCHES NOMINAL IN
style_designatorRECESSED
material_thickness0.501 INCHES MINIMUM AND 0.561 INCHES MAXIMUM IN
end_item_identification2355-01-616-9288
part_name_assigned_by_controlling_agencySPACER,APPLIQUE,A
NSN5310-01-629-6150
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12570970 · 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
•
STYLE DESIGNATOR: RECESSED
•
OUTSIDE DIAMETER: 2.75 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.501 INCHES MINIMUM AND 0.561 INCHES MAXIMUM IN
•
RECESS DIAMETER: 2.31 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY 6061 OVERALL
•
HOLE DIAMETER: 1.516 INCHES MINIMUM AND 1.576 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORRECESSED
OUTSIDE DIAMETER2.75 INCHES NOMINAL IN
MATERIAL THICKNESS0.501 INCHES MINIMUM AND 0.561 INCHES MAXIMUM IN
RECESS DIAMETER2.31 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYSPACER,APPLIQUE,A
END ITEM IDENTIFICATION2355-01-616-9288
MATERIALALUMINUM ALLOY 6061 OVERALL
HOLE DIAMETER1.516 INCHES MINIMUM AND 1.576 INCHES MAXIMUM 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 12570970?
12570970 is a WASHER,CONCAVE.
What is the NSN for 12570970?
12570970 is cataloged in the U.S. Government catalog under NSN 5310-01-629-6150. 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.