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Technical Data Sheet
PartsTable / COMPONENT / 1168857-5
1168857-5 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The PIN,GROOVED,HEADLESS is a the manufacturer industrial component. Key specifications include diameter: 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, material: STEEL COMP XM-12 OVERALL, overall_length: 1.640 INCHES NOMINAL IN, effective_length: 1.480 INCHES NOMINAL IN, special_features: HEAT TREATMENT- ANNEALED AND TEMPERED; STYLE- GROOVED BOTH ENDS, undercut_diameter: 0.228 INCHES MINIMUM AND 0.231 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-172-5120, 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
1168857-5
NSN: 5315-01-172-5120
FSC: 5315
CAGE: 45934 — ONTIC ENGINEERING & MANUFACTURING, INC DBA ONTIC US (USA)
SPECIFICATIONS
diameter0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
materialSTEEL COMP XM-12 OVERALL
overall_length1.640 INCHES NOMINAL IN
effective_length1.480 INCHES NOMINAL IN
special_featuresHEAT TREATMENT- ANNEALED AND TEMPERED; STYLE- GROOVED BOTH ENDS
undercut_diameter0.228 INCHES MINIMUM AND 0.231 INCHES MAXIMUM IN
end_item_identificationAH-64 HELICOPTER
nondefinitive_spec/std_dataH1025 PER AMS-H-6875 CONDITION
material_document_and_classificationAMS 5659 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyPIN, GROOVED, HEADLESS, WHEEL LOCK, TAIL LANDING GEAR
NSN5315-01-172-5120
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1168857-5 · 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: STEEL COMP XM-12 OVERALL
•
EFFECTIVE LENGTH: 1.480 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: H1025 PER AMS-H-6875 CONDITION
•
DIAMETER: 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
UNDERCUT DIAMETER: 0.228 INCHES MINIMUM AND 0.231 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONAH-64 HELICOPTER
PART NAME ASSIGNED BY CONTROLLING AGENCYPIN, GROOVED, HEADLESS, WHEEL LOCK, TAIL LANDING GEAR
OVERALL LENGTH1.640 INCHES NOMINAL IN
MATERIALSTEEL COMP XM-12 OVERALL
EFFECTIVE LENGTH1.480 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATAH1025 PER AMS-H-6875 CONDITION
DIAMETER0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
UNDERCUT DIAMETER0.228 INCHES MINIMUM AND 0.231 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5659 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SPECIAL FEATURESHEAT TREATMENT- ANNEALED AND TEMPERED; STYLE- GROOVED BOTH ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
1168857Interchangeable
interchangeable cross-reference
interchangeable
16135Interchangeable
interchangeable cross-reference
interchangeable
1168857-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1168857-5?
1168857-5 is a PIN,GROOVED,HEADLESS.
What parts can replace 1168857-5?
There are 3 known substitutes for 1168857-5: 1168857, 16135, 1168857-3. Substitute compatibility should be verified for your specific system.
What is the NSN for 1168857-5?
1168857-5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-172-5120. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026