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AMD-1740 ITEM 71 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

AMD-1740 ITEM 71: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL BODY, special_features: SAE HARDENED;DIAMETER:0.38IN IN, surface_treatment: ZINC SEALING ELEMENT, end_item_identification: CRANE ASSY FLDG BOOM FB30-27. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-553-7604, 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
AMD-1740 ITEM 71
NSN: 5310-01-553-7604
FSC: 5310 — Nuts and Washers
CAGE: 70433 — APPLETON MARINE INC (USA)
SPECIFICATIONS
materialSTEEL BODY
special_featuresSAE HARDENED;DIAMETER:0.38IN IN
surface_treatmentZINC SEALING ELEMENT
end_item_identificationCRANE ASSY FLDG BOOM FB30-27
NSN5310-01-553-7604
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AMD-1740 ITEM 71 · 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 TREATMENT: ZINC SEALING ELEMENT
•
MATERIAL: STEEL BODY
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESSAE HARDENED;DIAMETER:0.38IN IN
SURFACE TREATMENTZINC SEALING ELEMENT
END ITEM IDENTIFICATIONCRANE ASSY FLDG BOOM FB30-27
MATERIALSTEEL BODY
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 AMD-1740 ITEM 71?
AMD-1740 ITEM 71 is a WASHER,LOCK.
What is the NSN for AMD-1740 ITEM 71?
AMD-1740 ITEM 71 is cataloged in the U.S. Government catalog under NSN 5310-01-553-7604. 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.