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123WM40023-1 — WASHER,SHOULDERED AND RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

123WM40023-1: WASHER,SHOULDERED AND RECESSED.

The WASHER,SHOULDERED AND RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP E4340 OVERALL, recess_angle: 45.0 DEGREES NOMINAL, hole_diameter: 0.631 INCHES MINIMUM AND 0.643 INCHES MAXIMUM IN, hardness_rating: 37.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM, shoulder_height: 0.125 INCHES NOMINAL IN, outside_diameter: 1.625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-944-2604, 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
123WM40023-1
NSN: 5310-00-944-2604
FSC: 5310 — Nuts and Washers
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP E4340 OVERALL
recess_angle45.0 DEGREES NOMINAL
hole_diameter0.631 INCHES MINIMUM AND 0.643 INCHES MAXIMUM IN
hardness_rating37.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
shoulder_height0.125 INCHES NOMINAL IN
outside_diameter1.625 INCHES NOMINAL IN
style_designatorSHOULDERED AND RECESSED
shoulder_diameter1.125 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
material_thickness0.250 INCHES NOMINAL IN
material_document_and_classificationMIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-944-2604
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 123WM40023-1 · 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
•
SHOULDER HEIGHT: 0.125 INCHES NOMINAL IN
•
HARDNESS RATING: 37.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: SHOULDERED AND RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.625 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.250 INCHES NOMINAL IN
•
SHOULDER DIAMETER: 1.125 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS
SHOULDER HEIGHT0.125 INCHES NOMINAL IN
HARDNESS RATING37.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSHOULDERED AND RECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.625 INCHES NOMINAL IN
MATERIAL THICKNESS0.250 INCHES NOMINAL IN
SHOULDER DIAMETER1.125 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
MINIMUM YIELD STRENGTH16500 POUNDS PER SQUARE INCH LBS
MATERIALSTEEL COMP E4340 OVERALL
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 123WM40023-1?
123WM40023-1 is a WASHER,SHOULDERED AND RECESSED.
What is the NSN for 123WM40023-1?
123WM40023-1 is cataloged in the U.S. Government catalog under NSN 5310-00-944-2604. 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.