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SM-A-803658-1 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

SM-A-803658-1: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include recess_angle: 45.0 DEGREES NOMINAL, hole_diameter: 0.219 INCHES NOMINAL IN, recess_diameter: 0.312 INCHES NOMINAL IN, outside_diameter: 0.439 INCHES NOMINAL IN, style_designator: RECESSED, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-070-6672, 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
SM-A-803658-1
NSN: 5310-00-070-6672
FSC: 5310 — Nuts and Washers
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
recess_angle45.0 DEGREES NOMINAL
hole_diameter0.219 INCHES NOMINAL IN
recess_diameter0.312 INCHES NOMINAL IN
outside_diameter0.439 INCHES NOMINAL IN
style_designatorRECESSED
surface_treatmentPASSIVATE OVERALL
material_thickness0.250 INCHES NOMINAL IN
material_document_and_classificationMIL-S-7720 MIL SPEC 1ST MATERIAL RESPONSE OR ASTM A582 ASSN STD 2ND MATERIAL RESPONSE OVERALL
NSN5310-00-070-6672
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SM-A-803658-1 · 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
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-7720 MIL SPEC 1ST MATERIAL RESPONSE OR ASTM A582 ASSN STD 2ND MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.439 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.250 INCHES NOMINAL IN
•
RECESS DIAMETER: 0.312 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
HOLE DIAMETER: 0.219 INCHES NOMINAL IN
•
RECESS ANGLE: 45.0 DEGREES NOMINAL
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7720 MIL SPEC 1ST MATERIAL RESPONSE OR ASTM A582 ASSN STD 2ND MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.439 INCHES NOMINAL IN
MATERIAL THICKNESS0.250 INCHES NOMINAL IN
RECESS DIAMETER0.312 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
HOLE DIAMETER0.219 INCHES NOMINAL IN
RECESS ANGLE45.0 DEGREES NOMINAL
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 SM-A-803658-1?
SM-A-803658-1 is a WASHER,RECESSED.
What is the NSN for SM-A-803658-1?
SM-A-803658-1 is cataloged in the U.S. Government catalog under NSN 5310-00-070-6672. 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.