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NSN 5305-01-646-1699Government record, cited
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Screw, Cap, Socket Head5305-01-646-1699

NSN 5305-01-646-1699 · NIIN 016461699
FSC 5305 — Screws · FSG 53 — Hardware and Abrasives
Government record, cited
Also searched as  5305-01-646-1699 · 5305016461699 · NIIN 016461699 · 01-646-1699 · FSC 5305 Screws · B1831BH120140L · B18.3.1M
Nearby stock numbers  ·
L 140.0 MILLIMETERS NOMINAL MM ⌀12.0 MILLIMETERS MM ISO M BOLT/SCREW PROFILE
5305-01-646-1699 — Screws
Features
  • Screw,cap,socket Head — FSC 5305
  • Width Across Flats: 10.0 MILLIMETERS NOMINAL MM
  • Head Height: 11.7 MILLIMETERS MINIMUM AND 12.0 MILLIMETERS MAXIMUM MM
  • External Thread Tolerance Class: 4G6G
  • Fastener Length: 140.0 MILLIMETERS NOMINAL MM
  • Thread Pitch in Millimeters: 1.75
  • Thread Length: 36.0 MILLIMETERS MINIMUM AND 44.8 MILLIMETERS MAXIMUM MM
  • Nominal Thread Diameter: 12.0 MILLIMETERS MM
Identification
  • NSN: 5305-01-646-1699
  • NIIN: 016461699
  • FSC: 5305 — Screws
  • FSG: 53 — Hardware and Abrasives
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-646-1699, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-646-1699
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — Screws
StatusACTIVE
Width Across Flats10.0 MILLIMETERS NOMINAL MM
Head Height11.7 MILLIMETERS MINIMUM AND 12.0 MILLIMETERS MAXIMUM MM
External Thread Tolerance Class4G6G
Fastener Length140.0 MILLIMETERS NOMINAL MM
Thread Pitch in Millimeters1.75
Thread Length36.0 MILLIMETERS MINIMUM AND 44.8 MILLIMETERS MAXIMUM MM
Nominal Thread Diameter12.0 MILLIMETERS MM
Head StyleFLAT CHAMFER
Thread DirectionRIGHT-HAND
Locking FeaturePELLET OR STRIP OR PATCH THREADS
Internal Drive StyleHEXAGON
MaterialSTEEL PROPERTY CLASS 12.9 OVERALL
Thread Series DesignatorISO M
Head Diameter17.6 MILLIMETERS MINIMUM AND 18.0 MILLIMETERS MAXIMUM MM
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5305-01-646-1780B1831BH060012L POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)American National Standards Institute Incorporated Dba American National Standards Institute
5305-01-646-1807B1831BH060010L POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)American National Standards Institute Incorporated Dba American National Standards Institute
5305-01-646-1866B1831BH120160L POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)American National Standards Institute Incorporated Dba American National Standards Institute
5305-01-646-2239B1831BH060035L POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)American National Standards Institute Incorporated Dba American National Standards Institute
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
ReferenceMeaning
B1831BH120140L 3/2 Design control — primary reference
U.S. Government activity
B18.3.1M 3/1 Design control — primary reference
U.S. Government activity
Related Parts
5305-01-646-1780POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
B1831BH060012L
5305-01-646-1807POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
B1831BH060010L
5305-01-646-1866POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
B1831BH120160L
5305-01-646-2239POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
B1831BH060035L

Frequently Asked Questions

What is NSN 5305-01-646-1699?

NSN 5305-01-646-1699 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.

What NSN replaces 5305-01-646-1699?

4 possible matches (shared part number, not a government interchangeability claim): 5305-01-646-1780, 5305-01-646-1807, 5305-01-646-1866. Verify interchangeability with system specifications before substitution.

What are the specifications of 5305-01-646-1699?

Key specifications for 5305-01-646-1699: Width Across Flats: 10.0 MILLIMETERS NOMINAL MM; Head Height: 11.7 MILLIMETERS MINIMUM AND 12.0 MILLIMETERS MAXIMUM MM; External Thread Tolerance Class: 4G6G; Fastener Length: 140.0 MILLIMETERS NOMINAL MM. 14 specifications are documented in the U.S. Government catalog.

Is NSN 5305-01-646-1699 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.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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