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Technical Data Sheet
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401688-18 — PIN,STRAIGHT,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

401688-18: PIN,STRAIGHT,HEADLESS.

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5315-01-358-8579, 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
401688-18
NSN: 5315-01-358-8579
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 0UBG9 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DIV EPD (USA)
SPECIFICATIONS
Part Number401688-18
NSN5315-01-358-8579
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 401688-18 · 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
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES 4
RY-184913 PIECE 10.4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
RY-184913 PIECE 14.2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
RY-184913 PIECE 9.4Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
RY-184913 PIECE 11.4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 401688-18?
401688-18 is a PIN,STRAIGHT,HEADLESS.
What parts can replace 401688-18?
There are 4 known substitutes for 401688-18: RY-184913 PIECE 10.4, RY-184913 PIECE 14.2, RY-184913 PIECE 9.4 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 401688-18?
401688-18 is cataloged in the U.S. Government catalog under NSN 5315-01-358-8579. This indicates validated use in U.S. government and defense supply chains.
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