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NSN 5305-01-516-7945Government record, cited
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Screw, Panel Fastener5305-01-516-7945

NSN 5305-01-516-7945 · NIIN 015167945 · Part number B74133
O T S I · FSC 5305 — Screws · FSG 53 — Hardware and Abrasives · CAGE 05825
Government record, cited
NSN 5305-01-516-7945 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-516-7945. Manufacturer of record part number: B74133.
Also searched as  5305-01-516-7945 · 5305015167945 · NIIN 015167945 · 01-516-7945 · FSC 5305 Screws · CAGE 05825 · B74133 · NAS1351
Nearby stock numbers  ·
L 1.000 INCHES NOMINAL IN ⌀0.3125 INCHES IN UNRF BOLT/SCREW PROFILE
5305-01-516-7945 — Screws
Features
  • Screw,panel Fastener — FSC 5305
  • Width Across Flats: 0.250 INCHES NOMINAL IN
  • Head Height: 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
  • Fastener Length: 1.000 INCHES NOMINAL IN
  • Surface Treatment Document and Classification: UNABLE TO DECODE
  • Thread Length: 0.312 INCHES NOMINAL IN
  • Material Document and Classification: UNABLE TO DECODE
  • Nominal Thread Diameter: 0.3125 INCHES IN
Identification
  • NSN: 5305-01-516-7945
  • NIIN: 015167945
  • FSC: 5305 — Screws
  • FSG: 53 — Hardware and Abrasives
  • Primary part number: B74133
  • Manufacturer: O T S I
General Description

The Screw,panel Fastener, cataloged under National Stock Number 5305-01-516-7945, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is O T S I. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 11 items share a part number with this NSN in the catalog (possible match — not a government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
NSN5305-01-516-7945
Primary Part NumberB74133
Item NameScrew,panel Fastener
FSC / FSG5305 / 53 — Screws
ManufacturerO T S I
StatusACTIVE
Width Across Flats0.250 INCHES NOMINAL IN
Head Height0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
Fastener Length1.000 INCHES NOMINAL IN
Surface Treatment Document and ClassificationUNABLE TO DECODE
Thread Length0.312 INCHES NOMINAL IN
Material Document and ClassificationUNABLE TO DECODE
Nominal Thread Diameter0.3125 INCHES IN
Head StyleFLAT CHAMFER
Surface TreatmentUNABLE TO DECODE
Internal Drive StyleHEXAGON
Thread Class3A A
Thread Quantity Per Inch24
MaterialUNABLE TO DECODE
Thread Series DesignatorUNRF
Head Diameter0.457 INCHES MINIMUM AND 0.469 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 11
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
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
5305-01-734-1693NAS1351-4LE8 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
Part NumberManufacturer
B74133 PRIMARY O T S I (USA)
Reference documents
ReferenceMeaning
NAS1351 5/2 Secondary reference
U.S. Government activity
Related Parts
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 5305-01-516-7945?

NSN 5305-01-516-7945 is a Screw,panel Fastener, manufactured by O T S I, classified under FSC 5305, Screws. Status: active.

What part numbers are listed for NSN 5305-01-516-7945?

NSN 5305-01-516-7945 has 1 manufacturer part number on file: B74133 (O T S I).

What NSN replaces 5305-01-516-7945?

11 possible matches (shared part number, not a government interchangeability claim): 5305-01-603-1652, 5305-01-603-1654, 5305-01-611-1170. Verify interchangeability with system specifications before substitution.

What are the specifications of B74133?

Key specifications for B74133: Width Across Flats: 0.250 INCHES NOMINAL IN; Head Height: 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN; Fastener Length: 1.000 INCHES NOMINAL IN; Surface Treatment Document and Classification: UNABLE TO DECODE. 15 specifications are documented in the U.S. Government catalog.

Is NSN 5305-01-516-7945 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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