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7R4-16D — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

7R4-16D: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2017 OVERALL, recess_depth: 0.104 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN, hole_diameter: 0.962 INCHES MINIMUM AND 0.965 INCHES MAXIMUM IN, overall_height: 0.155 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN, surface_finish: 100.0 MICROINCHES ALL SURFACES, outside_diameter: 1.237 INCHES MINIMUM AND 1.240 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-209-1691, 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
7R4-16D
NSN: 5310-00-209-1691
FSC: 5310 — Nuts and Washers
CAGE: 43999 — THE BOEING COMPANY DIV LEGACY AM&M (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2017 OVERALL
recess_depth0.104 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
hole_diameter0.962 INCHES MINIMUM AND 0.965 INCHES MAXIMUM IN
overall_height0.155 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN
surface_finish100.0 MICROINCHES ALL SURFACES
outside_diameter1.237 INCHES MINIMUM AND 1.240 INCHES MAXIMUM IN
style_designatorRECESSED
surface_treatmentANODIZE OVERALL
material_thickness0.078 INCHES NOMINAL IN
material_document_and_classificationQQ-A-225/6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/4 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-225/5 FED SPEC 3RD MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-A-696 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-209-1691
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7R4-16D · 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 FINISH: 100.0 MICROINCHES ALL SURFACES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-A-696 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/4 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-225/5 FED SPEC 3RD MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.237 INCHES MINIMUM AND 1.240 INCHES MAXIMUM IN
•
RECESS DEPTH: 0.104 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.078 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH100.0 MICROINCHES ALL SURFACES
OVERALL HEIGHT0.155 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-A-696 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/4 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-225/5 FED SPEC 3RD MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.237 INCHES MINIMUM AND 1.240 INCHES MAXIMUM IN
RECESS DEPTH0.104 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
MATERIAL THICKNESS0.078 INCHES NOMINAL IN
SURFACE TREATMENTANODIZE OVERALL
MATERIALALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2017 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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7R4-16D?
7R4-16D is a WASHER,RECESSED.
What is the NSN for 7R4-16D?
7R4-16D is cataloged in the U.S. Government catalog under NSN 5310-00-209-1691. 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.