PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12998Screw,cap,socket Head

Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems · NSN 5305-01-007-1321 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-007-1321 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-007-1321. Primary manufacturer part number: 12998.
Features
  • Screw,cap,socket Head — FSC 5305
  • Thread Class: 2A A
  • Internal Drive Style: HEXAGON
  • Head Style: FLAT CHAMFER
  • Nominal Thread Diameter: 0.190 INCHES IN
  • Thread Series Designator: UNF
  • Head Diameter: 0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
  • Thread Quantity Per Inch: 32
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-007-1321, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems. Government technical data includes 11 verified specifications, 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-007-1321
Primary Part Number12998
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerStanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
StatusACTIVE
Thread Class2A A
Internal Drive StyleHEXAGON
Head StyleFLAT CHAMFER
Nominal Thread Diameter0.190 INCHES IN
Thread Series DesignatorUNF
Head Diameter0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
Thread Quantity Per Inch32
Width Across Flats0.156 INCHES NOMINAL IN
Fastener Length0.375 INCHES NOMINAL IN
Thread Length0.313 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
Head Height0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5340-00-090-2184 INTERCHANGEABLE
Standoff,threaded,spacing
2910-00-107-41630-13146 INTERCHANGEABLE
Carburetor,float
Zenith Fuel Systems Llc
1620-00-210-936212998 INTERCHANGEABLE
Shock Strut Assy,la
Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company
5945-00-258-33337264-30B INTERCHANGEABLE
Relay,electromagnetic
Leach International Corp Div Leach International Corporation
5950-00-434-2089373290-1 INTERCHANGEABLE
Transformer,pulse
Raytheon Company Dba Raytheon Co
6145-01-251-201112998 INTERCHANGEABLE
Cable,power,electrical
Rscc Wire & Cable Llc Dba Marmon Industrial Energy & Infrastructure - East Granby
5360-01-356-309812998 INTERCHANGEABLE
Spring,helical,compression
Meggitt North Hollywood Inc
Cross-Reference Index
Part NumberManufacturer
12998 PRIMARY Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems (USA)
Related Parts
5340-00-090-2184INTERCHANGEABLE
STANDOFF,THREADED,SPACING
2910-00-107-4163INTERCHANGEABLE
CARBURETOR,FLOAT
0-13146
1620-00-210-9362INTERCHANGEABLE
SHOCK STRUT ASSY,LA
12998
5945-00-258-3333INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
7264-30B
5950-00-434-2089INTERCHANGEABLE
TRANSFORMER,PULSE
373290-1
6145-01-251-2011INTERCHANGEABLE
CABLE,POWER,ELECTRICAL
12998
5360-01-356-3098INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
12998

Frequently Asked Questions

What is NSN 5305-01-007-1321?

NSN 5305-01-007-1321 is a Screw,cap,socket Head, manufactured by Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-007-1321?

NSN 5305-01-007-1321 has 1 cross-referenced part number: 12998 (Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems).

What NSN replaces 5305-01-007-1321?

There are 7 known substitutes for 5305-01-007-1321: 5340-00-090-2184, 2910-00-107-4163, 1620-00-210-9362 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12998?

Key specifications for 12998: Thread Class: 2A A; Internal Drive Style: HEXAGON; Head Style: FLAT CHAMFER; Nominal Thread Diameter: 0.190 INCHES IN. 11 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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