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7021-94-242-2137 — WASHER,SHOULDERED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

7021-94-242-2137: WASHER,SHOULDERED.

The WASHER,SHOULDERED is a the manufacturer industrial component. Key specifications include hole_diameter: 1.870 INCHES MINIMUM AND 1.878 INCHES MAXIMUM IN, shoulder_height: 0.018 INCHES NOMINAL IN, outside_diameter: 1.750 INCHES NOMINAL IN, style_designator: SHOULDERED, material_thickness: 0.040 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-252-3106, 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
7021-94-242-2137
NSN: 5310-01-252-3106
FSC: 5310 — Nuts and Washers
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
hole_diameter1.870 INCHES MINIMUM AND 1.878 INCHES MAXIMUM IN
shoulder_height0.018 INCHES NOMINAL IN
outside_diameter1.750 INCHES NOMINAL IN
style_designatorSHOULDERED
material_thickness0.040 INCHES NOMINAL IN
NSN5310-01-252-3106
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7021-94-242-2137 · 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
•
SHOULDER HEIGHT: 0.018 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SHOULDERED
•
OUTSIDE DIAMETER: 1.750 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.040 INCHES NOMINAL IN
•
HOLE DIAMETER: 1.870 INCHES MINIMUM AND 1.878 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SHOULDER HEIGHT0.018 INCHES NOMINAL IN
STYLE DESIGNATORSHOULDERED
OUTSIDE DIAMETER1.750 INCHES NOMINAL IN
MATERIAL THICKNESS0.040 INCHES NOMINAL IN
HOLE DIAMETER1.870 INCHES MINIMUM AND 1.878 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
5310PL1993629Reference document
Same NSN cross-reference
Reference document — Informative reference only
MIL-STD-130Reference document
Same NSN cross-reference
Reference document — Identification reference
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 7021-94-242-2137?
7021-94-242-2137 is a WASHER,SHOULDERED.
What parts can replace 7021-94-242-2137?
There are 2 known substitutes for 7021-94-242-2137: 5310PL1993629, MIL-STD-130. Substitute compatibility should be verified for your specific system.
What is the NSN for 7021-94-242-2137?
7021-94-242-2137 is cataloged in the U.S. Government catalog under NSN 5310-01-252-3106. 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.