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A312A168-101 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

A312A168-101: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 630 OVERALL, recess_angle: 80.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM, hole_diameter: 0.259 INCHES MINIMUM AND 0.264 INCHES MAXIMUM IN, recess_diameter: 0.320 INCHES NOMINAL IN, outside_diameter: 0.645 INCHES MINIMUM AND 0.655 INCHES MAXIMUM IN, style_designator: RECESSED. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-378-7631, 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
A312A168-101
NSN: 5310-01-378-7631
FSC: 5310 — Nuts and Washers
CAGE: 0D0D0 — BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 630 OVERALL
recess_angle80.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM
hole_diameter0.259 INCHES MINIMUM AND 0.264 INCHES MAXIMUM IN
recess_diameter0.320 INCHES NOMINAL IN
outside_diameter0.645 INCHES MINIMUM AND 0.655 INCHES MAXIMUM IN
style_designatorRECESSED
surface_treatmentPASSIVATE OVERALL
material_thickness0.125 INCHES NOMINAL IN
minimum_tensile_strength140000 POUNDS PER SQUARE INCH LBS
material_document_and_classificationAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-378-7631
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A312A168-101 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.645 INCHES MINIMUM AND 0.655 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.125 INCHES NOMINAL IN
•
RECESS DIAMETER: 0.320 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MINIMUM TENSILE STRENGTH: 140000 POUNDS PER SQUARE INCH LBS
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.645 INCHES MINIMUM AND 0.655 INCHES MAXIMUM IN
MATERIAL THICKNESS0.125 INCHES NOMINAL IN
RECESS DIAMETER0.320 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
MINIMUM TENSILE STRENGTH140000 POUNDS PER SQUARE INCH LBS
MATERIALSTEEL COMP 630 OVERALL
HOLE DIAMETER0.259 INCHES MINIMUM AND 0.264 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 A312A168-101?
A312A168-101 is a WASHER,RECESSED.
What is the NSN for A312A168-101?
A312A168-101 is cataloged in the U.S. Government catalog under NSN 5310-01-378-7631. 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.