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642A174 PIECE 2 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

642A174 PIECE 2: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1017 OVERALL, hole_diameter: 0.680 INCHES NOMINAL IN, special_features: DULL FINISH, material_thickness: 0.062 INCHES NOMINAL IN, length_across_flats: 2.120 INCHES NOMINAL IN, material_document_and_classification: QQ-S-636 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-240-7220, 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
642A174 PIECE 2
NSN: 5310-01-240-7220
FSC: 5310 — Nuts and Washers
CAGE: 01289 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 1017 OVERALL
hole_diameter0.680 INCHES NOMINAL IN
special_featuresDULL FINISH
material_thickness0.062 INCHES NOMINAL IN
length_across_flats2.120 INCHES NOMINAL IN
material_document_and_classificationQQ-S-636 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-240-7220
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 642A174 PIECE 2 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-636 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
•
LENGTH ACROSS FLATS: 2.120 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1017 OVERALL
•
HOLE DIAMETER: 0.680 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-636 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
LENGTH ACROSS FLATS2.120 INCHES NOMINAL IN
SPECIAL FEATURESDULL FINISH
MATERIALSTEEL COMP 1017 OVERALL
HOLE DIAMETER0.680 INCHES NOMINAL 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

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 642A174 PIECE 2?
642A174 PIECE 2 is a WASHER,LOCK.
What is the NSN for 642A174 PIECE 2?
642A174 PIECE 2 is cataloged in the U.S. Government catalog under NSN 5310-01-240-7220. 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.