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74A10551 — WASHER,SHOULDERED AND RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

74A10551: WASHER,SHOULDERED AND RECESSED.

The WASHER,SHOULDERED AND RECESSED is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 172 OVERALL, recess_angle: 88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM, hole_diameter: 2.9700 INCHES MINIMUM AND 2.9750 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES TOP, recess_diameter: 3.130 INCHES MINIMUM AND 3.135 INCHES MAXIMUM IN, shoulder_height: 0.470 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-121-8528, 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
74A10551
NSN: 5310-01-121-8528
FSC: 5310 — Nuts and Washers
CAGE: 6K4C8 — GOODRICH CORPORATION (USA)
SPECIFICATIONS
materialCOPPER ALLOY 172 OVERALL
recess_angle88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM
hole_diameter2.9700 INCHES MINIMUM AND 2.9750 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES TOP
recess_diameter3.130 INCHES MINIMUM AND 3.135 INCHES MAXIMUM IN
shoulder_height0.470 INCHES NOMINAL IN
outside_diameter3.504 INCHES MINIMUM AND 3.506 INCHES MAXIMUM IN
style_designatorSHOULDERED AND RECESSED
shoulder_diameter3.1900 INCHES MINIMUM AND 3.1915 INCHES MAXIMUM IN
material_thickness0.089 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
material_document_and_classificationQQ-C-530,TEMPER AT FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-121-8528
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 74A10551 · 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: 63.0 MICROINCHES TOP
•
SHOULDER HEIGHT: 0.470 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SHOULDERED AND RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-530,TEMPER AT FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 3.504 INCHES MINIMUM AND 3.506 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.089 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 3.1900 INCHES MINIMUM AND 3.1915 INCHES MAXIMUM IN
•
RECESS DIAMETER: 3.130 INCHES MINIMUM AND 3.135 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH63.0 MICROINCHES TOP
SHOULDER HEIGHT0.470 INCHES NOMINAL IN
STYLE DESIGNATORSHOULDERED AND RECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-530,TEMPER AT FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER3.504 INCHES MINIMUM AND 3.506 INCHES MAXIMUM IN
MATERIAL THICKNESS0.089 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
SHOULDER DIAMETER3.1900 INCHES MINIMUM AND 3.1915 INCHES MAXIMUM IN
RECESS DIAMETER3.130 INCHES MINIMUM AND 3.135 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY 172 OVERALL
HOLE DIAMETER2.9700 INCHES MINIMUM AND 2.9750 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 2
10109388Reference document
Same NSN cross-reference
Reference document — Informative reference only
74A410551-2001Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 74A10551?
74A10551 is a WASHER,SHOULDERED AND RECESSED.
What parts can replace 74A10551?
There are 2 known substitutes for 74A10551: 10109388, 74A410551-2001. Substitute compatibility should be verified for your specific system.
What is the NSN for 74A10551?
74A10551 is cataloged in the U.S. Government catalog under NSN 5310-01-121-8528. 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.