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NSN 5305-00-178-8639Government record, cited
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Screw, Shoulder5305-00-178-8639

NSN 5305-00-178-8639 · NIIN 001788639
FSC 5305 — Screws · FSG 53 — Hardware and Abrasives
Government record, cited
Also searched as  5305-00-178-8639 · 5305001788639 · NIIN 001788639 · 00-178-8639 · FSC 5305 Screws
Nearby stock numbers  ·
L 0.344 INCHES MINIMUM AND 0.346 INCHES MAXIMUM IN ⌀0.124 INCHES MINIMUM AND 0.125 INCHES MAXIMUM FIRST SHOULDER IN UNIFIED NATIONAL COARSE (UNC) BOLT/SCREW PROFILE
5305-00-178-8639 — Screws
Features
  • Screw,shoulder — FSC 5305
  • Head Height: 0.125 INCHES NOMINAL IN
  • Fastener Length: 0.344 INCHES MINIMUM AND 0.346 INCHES MAXIMUM IN
  • Shoulder Length: 0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM FIRST SHOULDER IN
  • Shoulder Diameter: 0.124 INCHES MINIMUM AND 0.125 INCHES MAXIMUM FIRST SHOULDER IN
  • Thread Length: 0.156 INCHES NOMINAL IN
  • Shoulder Shape: ROUND FIRST SHOULDER
  • Hardness Rating: 28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
Identification
  • NSN: 5305-00-178-8639
  • NIIN: 001788639
  • FSC: 5305 — Screws
  • FSG: 53 — Hardware and Abrasives
General Description

The Screw,shoulder, cataloged under National Stock Number 5305-00-178-8639, 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16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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
NSN5305-00-178-8639
Item NameScrew,shoulder
FSC / FSG5305 / 53 — Screws
StatusACTIVE
Head Height0.125 INCHES NOMINAL IN
Fastener Length0.344 INCHES MINIMUM AND 0.346 INCHES MAXIMUM IN
Shoulder Length0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM FIRST SHOULDER IN
Shoulder Diameter0.124 INCHES MINIMUM AND 0.125 INCHES MAXIMUM FIRST SHOULDER IN
Thread Length0.156 INCHES NOMINAL IN
Shoulder ShapeROUND FIRST SHOULDER
Hardness Rating28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
Nominal Thread Diameter0.112 INCHES IN
Head StyleFLAT CHAMFER
Thread DirectionRIGHT-HAND
Internal Drive StyleSLOT
Thread Class2A A
Thread Quantity Per Inch40
MaterialSTEEL COMP 416 OVERALL
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Head Diameter0.250 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
6230-00-215-8559 POSSIBLE MATCH
FLASHLIGHT
Possible match (shared part number)
5340-00-490-9110 POSSIBLE MATCH
PANEL LEG BASE
Possible match (shared part number)
5935-00-509-2547151-368-1 POSSIBLE MATCH
CONNECTOR,PLUG,ELECTRICAL
Possible match (shared part number)Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp
6210-00-884-3050PL-2 POSSIBLE MATCH
LIGHT,INDICATOR
Possible match (shared part number)Panelight Components Group, Llc Dba Panelight Components Group Llc
7420-01-014-9218 POSSIBLE MATCH
PLOTTER
Possible match (shared part number)
5305-01-071-1475 POSSIBLE MATCH
SCREW,SHOULDER
Possible match (shared part number)
3950-01-196-1053 POSSIBLE MATCH
WINCH,DRUM,POWER OPERATED
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
ReferenceMeaning
PL2 3/9 Design control — primary reference
W. M. Berg, Inc.
Related Parts
6230-00-215-8559POSSIBLE MATCH
FLASHLIGHT
5340-00-490-9110POSSIBLE MATCH
PANEL LEG BASE
5935-00-509-2547POSSIBLE MATCH
CONNECTOR,PLUG,ELECTRICAL
151-368-1
6210-00-884-3050POSSIBLE MATCH
LIGHT,INDICATOR
PL-2
7420-01-014-9218POSSIBLE MATCH
PLOTTER
5305-01-071-1475POSSIBLE MATCH
SCREW,SHOULDER
3950-01-196-1053POSSIBLE MATCH
WINCH,DRUM,POWER OPERATED

Frequently Asked Questions

What is NSN 5305-00-178-8639?

NSN 5305-00-178-8639 is a Screw,shoulder, classified under FSC 5305, Screws. Status: active.

What NSN replaces 5305-00-178-8639?

7 possible matches (shared part number, not a government interchangeability claim): 6230-00-215-8559, 5340-00-490-9110, 5935-00-509-2547. Verify interchangeability with system specifications before substitution.

What are the specifications of 5305-00-178-8639?

Key specifications for 5305-00-178-8639: Head Height: 0.125 INCHES NOMINAL IN; Fastener Length: 0.344 INCHES MINIMUM AND 0.346 INCHES MAXIMUM IN; Shoulder Length: 0.188 INCHES MINIMUM AND 0.190 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.124 INCHES MINIMUM AND 0.125 INCHES MAXIMUM FIRST SHOULDER IN. 16 specifications are documented in the U.S. Government catalog.

Is NSN 5305-00-178-8639 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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