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18861J — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

18861J: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: DOUBLE HEXAGON EXTENDED WASHER, thread_class: 2A A, thread_length: 1.000 INCHES NOMINAL IN, screw_material: STEEL CORROSION RESISTING, fastener_length: 2.190 INCHES NOMINAL IN, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-162-8286, 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
18861J
NSN: 5305-01-162-8286
FSC: 5305 — Screws
CAGE: 77873 — ROCKFORD POWERTRAIN INC DIV POWERTRAIN ROCKFORD, INC. (USA)
SPECIFICATIONS
head_styleDOUBLE HEXAGON EXTENDED WASHER
thread_class2A A
thread_length1.000 INCHES NOMINAL IN
screw_materialSTEEL CORROSION RESISTING
fastener_length2.190 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.420 INCHES NOMINAL IN
nominal_thread_diameter0.375 INCHES IN
extended_washer_diameter0.550 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
thread_quantity_per_inch24
thread_series_designatorUNF
extended_washer_thickness0.015 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
NSN5305-01-162-8286
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 18861J · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
EXTENDED WASHER THICKNESS: 0.015 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
•
FASTENER LENGTH: 2.190 INCHES NOMINAL IN
•
EXTENDED WASHER DIAMETER: 0.550 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
•
THREAD LENGTH: 1.000 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON EXTENDED WASHER
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.420 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.015 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
FASTENER LENGTH2.190 INCHES NOMINAL IN
EXTENDED WASHER DIAMETER0.550 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
THREAD LENGTH1.000 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD STYLEDOUBLE HEXAGON EXTENDED WASHER
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.420 INCHES NOMINAL IN
SCREW MATERIALSTEEL CORROSION RESISTING
THREAD CLASS2A A
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES 1
LA-1481-4Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 18861J?
18861J is a SCREW,MACHINE.
What parts can replace 18861J?
There is 1 known substitute for 18861J: LA-1481-4. Substitute compatibility should be verified for your specific system.
What is the NSN for 18861J?
18861J is cataloged in the U.S. Government catalog under NSN 5305-01-162-8286. 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.