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12007758 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12007758: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, recess_angle: 45.0 DEGREES NOMINAL, hole_diameter: 1.750 INCHES MINIMUM AND 1.752 INCHES MAXIMUM IN, hardness_rating: 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM, recess_diameter: 2.103 INCHES MINIMUM AND 2.105 INCHES MAXIMUM IN, outside_diameter: 5.060 INCHES MINIMUM AND 5.070 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-034-6643, 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
12007758
NSN: 5310-01-034-6643
FSC: 5310 — Nuts and Washers
CAGE: 19204 — ARMY, UNITED STATES DEPARTMENT OF THE DBA ROCK ISLAND ARSENAL JMTC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
recess_angle45.0 DEGREES NOMINAL
hole_diameter1.750 INCHES MINIMUM AND 1.752 INCHES MAXIMUM IN
hardness_rating30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM
recess_diameter2.103 INCHES MINIMUM AND 2.105 INCHES MAXIMUM IN
outside_diameter5.060 INCHES MINIMUM AND 5.070 INCHES MAXIMUM IN
style_designatorRECESSED
surface_treatmentOXIDE FILM OVERALL
material_thickness0.400 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN
NSN5310-01-034-6643
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12007758 · 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: 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: RECESSED
•
OUTSIDE DIAMETER: 5.060 INCHES MINIMUM AND 5.070 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.400 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN
•
RECESS DIAMETER: 2.103 INCHES MINIMUM AND 2.105 INCHES MAXIMUM IN
•
SURFACE TREATMENT: OXIDE FILM OVERALL
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 1.750 INCHES MINIMUM AND 1.752 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HARDNESS RATING30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORRECESSED
OUTSIDE DIAMETER5.060 INCHES MINIMUM AND 5.070 INCHES MAXIMUM IN
MATERIAL THICKNESS0.400 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN
RECESS DIAMETER2.103 INCHES MINIMUM AND 2.105 INCHES MAXIMUM IN
SURFACE TREATMENTOXIDE FILM OVERALL
MATERIALSTEEL OVERALL
HOLE DIAMETER1.750 INCHES MINIMUM AND 1.752 INCHES MAXIMUM IN
RECESS ANGLE45.0 DEGREES NOMINAL
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 12007758?
12007758 is a WASHER,RECESSED.
What is the NSN for 12007758?
12007758 is cataloged in the U.S. Government catalog under NSN 5310-01-034-6643. 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.