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ST4M150C4001 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

ST4M150C4001: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 321 OR STEEL COMP 347 OVERALL, recess_angle: 89.0 DEGREES MINIMUM AND 91.0 DEGREES MAXIMUM, hole_diameter: 0.252 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, recess_diameter: 0.334 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN, outside_diameter: 0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN, style_designator: RECESSED. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-030-8420, 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
ST4M150C4001
NSN: 5310-01-030-8420
FSC: 5310 — Nuts and Washers
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP 321 OR STEEL COMP 347 OVERALL
recess_angle89.0 DEGREES MINIMUM AND 91.0 DEGREES MAXIMUM
hole_diameter0.252 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
recess_diameter0.334 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN
outside_diameter0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
style_designatorRECESSED
surface_treatmentPASSIVATE OVERALL
material_thickness0.074 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN
minimum_tensile_strength75000 POUNDS PER SQUARE INCH LBS
material_document_and_classificationQQ-S-763,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5310-01-030-8420
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: ST4M150C4001 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.074 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN
•
RECESS DIAMETER: 0.334 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MINIMUM TENSILE STRENGTH: 75000 POUNDS PER SQUARE INCH LBS
•
MATERIAL: STEEL COMP 321 OR STEEL COMP 347 OVERALL
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,COND A FED SPEC ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
MATERIAL THICKNESS0.074 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN
RECESS DIAMETER0.334 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
MINIMUM TENSILE STRENGTH75000 POUNDS PER SQUARE INCH LBS
MATERIALSTEEL COMP 321 OR STEEL COMP 347 OVERALL
HOLE DIAMETER0.252 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
RECESS ANGLE89.0 DEGREES MINIMUM AND 91.0 DEGREES MAXIMUM
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 ST4M150C4001?
ST4M150C4001 is a WASHER,RECESSED.
What is the NSN for ST4M150C4001?
ST4M150C4001 is cataloged in the U.S. Government catalog under NSN 5310-01-030-8420. 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.