NSN 5305-01-651-6444 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-651-6444. Manufacturer of record part number: 3866251016.
Extended Washer Diameter: 43.0 MILLIMETERS NOMINAL MM
Thread Pitch in Millimeters: 2.5
Thread Length: 52.0 MILLIMETERS NOMINAL MM
Nominal Thread Diameter: 20.0 MILLIMETERS MM
Head Style: HEXAGON EXTENDED WASHER
Identification
NSN: 5305-01-651-6444
NIIN: 016516444
FSC: 5305 — Screws
FSG: 53 — Hardware and Abrasives
Primary part number: 3866251016
Manufacturer: Oshkosh Defense Llc
General Description
The Screw,machine, cataloged under National Stock Number 5305-01-651-6444, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5305-01-651-6444
Primary Part Number
3866251016
Item Name
Screw,machine
FSC / FSG
5305 / 53 — Screws
Manufacturer
Oshkosh Defense Llc
Status
ACTIVE
Head Height
17.1 MILLIMETERS MAXIMUM MM
Fastener Length
170.0 MILLIMETERS NOMINAL MM
Extended Washer Diameter
43.0 MILLIMETERS NOMINAL MM
Thread Pitch in Millimeters
2.5
Thread Length
52.0 MILLIMETERS NOMINAL MM
Nominal Thread Diameter
20.0 MILLIMETERS MM
Head Style
HEXAGON EXTENDED WASHER
Thread Direction
RIGHT-HAND
Width Between Flats
26.7 MILLIMETERS MINIMUM AND 27.0 MILLIMETERS MAXIMUM MM
Screw Material
STEEL PROPERTY CLASS 10.9
Thread Series Designator
M
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5305-01-651-90193866251001POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)Oshkosh Defense Llc
5305-01-652-134212414307-196POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)U S Army Tank Automotive Command Amsta-Im-Mm
5305-01-652-319412414307-202POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)U S Army Tank Automotive Command Amsta-Im-Mm
5305-01-661-388312414307-190POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)U S Army Tank Automotive Command Amsta-Im-Mm
5305-01-673-3410AES12M20F090WC2M52POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)The American Society of Mechanical Engineers
5305-01-694-292812414307-205POSSIBLE MATCH
SCREW,CAP,HEXAGON HEAD
Possible match (shared part number)U S Army Tank Automotive Command Amsta-Im-Mm
5306-01-716-230512414307-204POSSIBLE MATCH
BOLT,MACHINE
Possible match (shared part number)U S Army Tank Automotive Command Amsta-Im-Mm
5306-01-716-231012414307-201POSSIBLE MATCH
BOLT,MACHINE
Possible match (shared part number)U S Army Tank Automotive Command Amsta-Im-Mm
NSN 5305-01-651-6444 is a Screw,machine, manufactured by Oshkosh Defense Llc, classified under FSC 5305, Screws. Status: active.
What part numbers are listed for NSN 5305-01-651-6444?
NSN 5305-01-651-6444 has 1 manufacturer part number on file: 3866251016 (Oshkosh Defense Llc).
What NSN replaces 5305-01-651-6444?
8 possible matches (shared part number, not a government interchangeability claim): 5305-01-651-9019, 5305-01-652-1342, 5305-01-652-3194. Verify interchangeability with system specifications before substitution.
What are the specifications of 3866251016?
Key specifications for 3866251016: Head Height: 17.1 MILLIMETERS MAXIMUM MM; Fastener Length: 170.0 MILLIMETERS NOMINAL MM; Extended Washer Diameter: 43.0 MILLIMETERS NOMINAL MM; Thread Pitch in Millimeters: 2.5. 11 specifications are documented in the U.S. Government catalog.
Is NSN 5305-01-651-6444 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.