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NSN 5305-01-381-2091Government record, cited
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Screw, Cap, Socket Head5305-01-381-2091

NSN 5305-01-381-2091 · NIIN 013812091
FSC 5305 — Screws · FSG 53 — Hardware and Abrasives
Government record, cited
Also searched as  5305-01-381-2091 · 5305013812091 · NIIN 013812091 · 01-381-2091 · FSC 5305 Screws · NAS1351-6LE20P · FF-S-86 · NAS1351
Nearby stock numbers  ·
L 1.210 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN ⌀0.375 INCHES IN UNRF BOLT/SCREW PROFILE
5305-01-381-2091 — Screws
Features
  • Screw,cap,socket Head — FSC 5305
  • Width Across Flats: 0.3125 INCHES MINIMUM AND 0.3160 INCHES MAXIMUM IN
  • Head Height: 0.366 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
  • Fastener Length: 1.210 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
  • Surface Treatment Document and Classification: QQ-P-416 TY2 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Thread Length: 1.167 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
  • Nominal Thread Diameter: 0.375 INCHES IN
  • Head Style: FLAT CHAMFER
Identification
  • NSN: 5305-01-381-2091
  • NIIN: 013812091
  • FSC: 5305 — Screws
  • FSG: 53 — Hardware and Abrasives
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-381-2091, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 12 items share a part number with this NSN in the catalog (possible match — not a government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
NSN5305-01-381-2091
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — Screws
StatusACTIVE
Width Across Flats0.3125 INCHES MINIMUM AND 0.3160 INCHES MAXIMUM IN
Head Height0.366 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
Fastener Length1.210 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
Surface Treatment Document and ClassificationQQ-P-416 TY2 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Thread Length1.167 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
Nominal Thread Diameter0.375 INCHES IN
Head StyleFLAT CHAMFER
Thread DirectionRIGHT-HAND
Locking FeaturePATCH OR PELLET OR STRIP LOCKING FEATURE
Surface TreatmentCADMIUM AND CHROMATE OVERALL
Internal Drive StyleHEXAGON
Thread Class3A A
Thread Quantity Per Inch24
MaterialSTEEL OVERALL
Thread Series DesignatorUNRF
Head Diameter0.550 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 12
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5305-01-516-7945B74133 POSSIBLE MATCH
SCREW,PANEL FASTENER
Possible match (shared part number)O T S I
5305-01-603-1652NAS1351-4LL8P POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-01-603-1654NAS1351-8LL12P POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-01-611-1170NAS1351N3LE32 POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-01-623-0133NAS1351-03-8P POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-01-671-0016NAS1351C4LB28 POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-01-671-1052NAS1351C6LB12 POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-01-671-1054NAS1351C6LB16 POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-01-733-6362NAS1351N12-88G POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-01-733-6392NAS1351N5H14G POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
ReferenceMeaning
NAS1351-6LE20P 3/2 Design control — primary reference
U.S. Government activity
FF-S-86 4/1 Identification reference
U.S. Government activity
NAS1351 D/9 Drawing number reference only
U.S. Government activity
Related Parts
5305-01-516-7945POSSIBLE MATCH
SCREW,PANEL FASTENER
B74133
5305-01-603-1652POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
NAS1351-4LL8P
5305-01-603-1654POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
NAS1351-8LL12P
5305-01-611-1170POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
NAS1351N3LE32
5305-01-623-0133POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
NAS1351-03-8P
5305-01-671-0016POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
NAS1351C4LB28
5305-01-671-1052POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
NAS1351C6LB12
5305-01-671-1054POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
NAS1351C6LB16
5305-01-733-6362POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
NAS1351N12-88G
5305-01-733-6392POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
NAS1351N5H14G
5305-01-734-1693POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
NAS1351-4LE8
5305-01-734-3465POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
NAS1351N06-16

Frequently Asked Questions

What is NSN 5305-01-381-2091?

NSN 5305-01-381-2091 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.

What NSN replaces 5305-01-381-2091?

12 possible matches (shared part number, not a government interchangeability claim): 5305-01-516-7945, 5305-01-603-1652, 5305-01-603-1654. Verify interchangeability with system specifications before substitution.

What are the specifications of 5305-01-381-2091?

Key specifications for 5305-01-381-2091: Width Across Flats: 0.3125 INCHES MINIMUM AND 0.3160 INCHES MAXIMUM IN; Head Height: 0.366 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Fastener Length: 1.210 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 TY2 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 16 specifications are documented in the U.S. Government catalog.

Is NSN 5305-01-381-2091 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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