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838787-401 — RESTRAINT SYSTEM

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

838787-401: RESTRAINT SYSTEM.

The RESTRAINT SYSTEM is a the manufacturer industrial component. Key specifications include part_name_assigned_by_controlling_agency: RESTRAINT SYSTEM. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-398-1731, 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
838787-401
NSN: 5315-01-398-1731
NIINs: 013981731, 014797069
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 50464 — HQ ELECTRONIC SYSTEMS DIV AIR FORCE SYSTEMS COMMAND (USA)
SPECIFICATIONS
part_name_assigned_by_controlling_agencyRESTRAINT SYSTEM
NSN5315-01-398-1731
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 838787-401 · 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
•
SHANK DIAMETER: 0.605 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN
•
SECOND SHANK DIAMETER: 0.727 INCHES MINIMUM AND 0.737 INCHES MAXIMUM IN
•
FIRST END LOCATION: THREADED END
•
FIRST END COUNTERBORE DIAMETER: 0.650 INCHES NOMINAL IN
•
FIRST END STYLE: COUNTERBORED W/O THRU HOLE
•
SHANK LENGTH: 0.808 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SHOULDER
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.605 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN
SECOND SHANK DIAMETER0.727 INCHES MINIMUM AND 0.737 INCHES MAXIMUM IN
FIRST END LOCATIONTHREADED END
FIRST END COUNTERBORE DIAMETER0.650 INCHES NOMINAL IN
FIRST END STYLECOUNTERBORED W/O THRU HOLE
SHANK LENGTH0.808 INCHES NOMINAL IN
STYLE DESIGNATORSHOULDER
OVERALL LENGTH1.125 INCHES MINIMUM AND 1.145 INCHES MAXIMUM IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
SHOULDER DIAMETER0.925 INCHES MINIMUM AND 0.935 INCHES MAXIMUM IN
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 838787-401?
838787-401 is a RESTRAINT SYSTEM.
What is the NSN for 838787-401?
838787-401 is cataloged in the U.S. Government catalog under NSN 5315-01-398-1731. 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.