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163B5711 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

163B5711: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OR STEEL OVERALL, recess_angle: 99.0 DEGREES NOMINAL, recess_depth: 0.108 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN, hole_diameter: 0.285 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN, hardness_rating: 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM, recess_diameter: 0.516 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-296-3273, 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
163B5711
NSN: 5310-00-296-3273
FSC: 5310 — Nuts and Washers
CAGE: 05606 — GENERAL DYNAMICS-OTS, INC. DIV ORDNANCE AND TACTICAL SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OR STEEL OVERALL
recess_angle99.0 DEGREES NOMINAL
recess_depth0.108 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
hole_diameter0.285 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN
hardness_rating30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM
recess_diameter0.516 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN
outside_diameter0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
style_designatorRECESSED
material_thickness0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5310-00-296-3273
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 163B5711 · 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
•
HARDNESS RATING: 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
•
RECESS DEPTH: 0.108 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
•
RECESS DIAMETER: 0.516 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 4140 OR STEEL OVERALL
TECHNICAL CHARACTERISTICS
HARDNESS RATING30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
RECESS DEPTH0.108 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
MATERIAL THICKNESS0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
RECESS DIAMETER0.516 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN
MATERIALSTEEL COMP 4140 OR STEEL OVERALL
HOLE DIAMETER0.285 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN
RECESS ANGLE99.0 DEGREES NOMINAL
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 163B5711?
163B5711 is a WASHER,RECESSED.
What is the NSN for 163B5711?
163B5711 is cataloged in the U.S. Government catalog under NSN 5310-00-296-3273. 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.