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1958-C-18 — WASHER,SHOULDERED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1958-C-18: WASHER,SHOULDERED.

The WASHER,SHOULDERED is a the manufacturer industrial component. Key specifications include material: COPPER OVERALL, hole_diameter: 2.110 INCHES MINIMUM AND 2.112 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES TOP, shoulder_height: 0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN, outside_diameter: 2.869 INCHES MINIMUM AND 2.871 INCHES MAXIMUM IN, style_designator: SHOULDERED. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-112-6657, 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
1958-C-18
NSN: 5310-01-112-6657
FSC: 5310 — Nuts and Washers
CAGE: 13002 — GOODRICH CORPORATION DIV ADVANCED STRUCTURES LANDING SYSTEMS (USA)
SPECIFICATIONS
materialCOPPER OVERALL
hole_diameter2.110 INCHES MINIMUM AND 2.112 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES TOP
shoulder_height0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN
outside_diameter2.869 INCHES MINIMUM AND 2.871 INCHES MAXIMUM IN
style_designatorSHOULDERED
shoulder_diameter2.252 INCHES MINIMUM AND 2.253 INCHES MAXIMUM IN
material_thickness0.089 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
material_document_and_classificationQQ-C-530,COND AT FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5310-01-112-6657
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1958-C-18 · 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: 0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SHOULDERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-530,COND AT FED SPEC ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 2.869 INCHES MINIMUM AND 2.871 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.089 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 2.252 INCHES MINIMUM AND 2.253 INCHES MAXIMUM IN
•
MATERIAL: COPPER OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH63.0 MICROINCHES TOP
SHOULDER HEIGHT0.455 INCHES MINIMUM AND 0.465 INCHES MAXIMUM IN
STYLE DESIGNATORSHOULDERED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-530,COND AT FED SPEC ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER2.869 INCHES MINIMUM AND 2.871 INCHES MAXIMUM IN
MATERIAL THICKNESS0.089 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
SHOULDER DIAMETER2.252 INCHES MINIMUM AND 2.253 INCHES MAXIMUM IN
MATERIALCOPPER OVERALL
HOLE DIAMETER2.110 INCHES MINIMUM AND 2.112 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
74A450631-2001Reference document
Same NSN cross-reference
Reference document — Secondary reference
10122170Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 1958-C-18?
1958-C-18 is a WASHER,SHOULDERED.
What parts can replace 1958-C-18?
There are 2 known substitutes for 1958-C-18: 74A450631-2001, 10122170. Substitute compatibility should be verified for your specific system.
What is the NSN for 1958-C-18?
1958-C-18 is cataloged in the U.S. Government catalog under NSN 5310-01-112-6657. 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.