PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12556Screw,cap,socket Head

O F Mossberg & Sons Inc · NSN 5305-01-715-6523 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-715-6523 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-715-6523. Primary manufacturer part number: 12556.
Features
  • Screw,cap,socket Head — FSC 5305
  • Head Diameter: 0.27 INCHES NOMINAL IN
  • 1 verified cross-reference
  • Primary manufacturer: O F Mossberg & Sons Inc
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-715-6523, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is O F Mossberg & Sons Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-715-6523
Primary Part Number12556
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerO F Mossberg & Sons Inc
StatusACTIVE
Head Diameter0.27 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
2520-00-096-8460 INTERCHANGEABLE
Disk,clutch,vehicular
5310-00-484-665512556 INTERCHANGEABLE
Washer,flat
Triumph Engine Control Systems Llc
2940-00-875-91550997018 INTERCHANGEABLE
Filter Element,intake Air Cleane
Perkins Engines Inc
Cross-Reference Index
Part NumberManufacturer
12556 PRIMARY O F Mossberg & Sons Inc (USA)
Related Parts
2520-00-096-8460INTERCHANGEABLE
DISK,CLUTCH,VEHICULAR
5310-00-484-6655INTERCHANGEABLE
WASHER,FLAT
12556
2940-00-875-9155INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
0997018

Frequently Asked Questions

What is NSN 5305-01-715-6523?

NSN 5305-01-715-6523 is a Screw,cap,socket Head, manufactured by O F Mossberg & Sons Inc, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-715-6523?

NSN 5305-01-715-6523 has 1 cross-referenced part number: 12556 (O F Mossberg & Sons Inc).

What NSN replaces 5305-01-715-6523?

There are 3 known substitutes for 5305-01-715-6523: 2520-00-096-8460, 5310-00-484-6655, 2940-00-875-9155. Verify interchangeability with system specifications before substitution.

What are the specifications of 12556?

Key specifications for 12556: Part Name Assigned by Controlling Agency: SCREW RET REAR SIGHT; Head Diameter: 0.27 INCHES NOMINAL IN; Special Features: OVERALL LENGTH 0.44 INCHES; FINISH MANGANEE PHOSPHATE IN. 3 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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