PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

99401Stud,plain

Charles Reed Knight Jr Dba Knight's Armament Company · NSN 5307-01-599-6139 · FSC 5307 · No Item Name Available
Verified by PartsTable
NSN 5307-01-599-6139 — this item is cataloged by the U.S. Government under National Stock Number 5307-01-599-6139. Primary manufacturer part number: 99401.
Features
  • Stud,plain — FSC 5307
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) STUD THREAD
  • Thread Quantity Per Inch: 20 STUD THREAD
  • Nominal Thread Size: 0.250 INCHES STUD THREAD IN
  • 1 verified cross-reference
  • Primary manufacturer: Charles Reed Knight Jr Dba Knight's Armament Company
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Stud,plain, cataloged under National Stock Number 5307-01-599-6139, is classified within Federal Supply Class 5307 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Charles Reed Knight Jr Dba Knight's Armament Company. Government technical data includes 3 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5307-01-599-6139
Primary Part Number99401
Item NameStud,plain
FSC / FSG5307 / 53 — No Item Name Available
ManufacturerCharles Reed Knight Jr Dba Knight's Armament Company
StatusACTIVE
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) STUD THREAD
Thread Quantity Per Inch20 STUD THREAD
Nominal Thread Size0.250 INCHES STUD THREAD IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
4730-00-278-5006 INTERCHANGEABLE
Cap,tube
3110-00-771-05259940-1 INTERCHANGEABLE
Bearing,ball,annular
B.w. Elliott Manufacturing Co., Llc
5330-01-591-542599401 INTERCHANGEABLE
Seal,plain
The Timken Corporation
3120-01-690-719399401 INTERCHANGEABLE
Bearing,sleeve
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
Cross-Reference Index
Part NumberManufacturer
99401 PRIMARY Charles Reed Knight Jr Dba Knight's Armament Company (USA)
Related Parts
4730-00-278-5006INTERCHANGEABLE
CAP,TUBE
3110-00-771-0525INTERCHANGEABLE
BEARING,BALL,ANNULAR
9940-1
5330-01-591-5425INTERCHANGEABLE
SEAL,PLAIN
99401
3120-01-690-7193INTERCHANGEABLE
BEARING,SLEEVE
99401

Frequently Asked Questions

What is NSN 5307-01-599-6139?

NSN 5307-01-599-6139 is a Stud,plain, manufactured by Charles Reed Knight Jr Dba Knight's Armament Company, classified under FSC 5307 (No Item Name Available). Status: active.

What are the part numbers for NSN 5307-01-599-6139?

NSN 5307-01-599-6139 has 1 cross-referenced part number: 99401 (Charles Reed Knight Jr Dba Knight's Armament Company).

What NSN replaces 5307-01-599-6139?

There are 4 known substitutes for 5307-01-599-6139: 4730-00-278-5006, 3110-00-771-0525, 5330-01-591-5425 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 99401?

Key specifications for 99401: End Item Identification: SEMI-AUTOMATIC SNIPER RIFLE M110; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) STUD THREAD; Part Name Assigned by Controlling Agency: STUD,1/4-20 THREADED,SLING SWIVEL; Thread Quantity Per Inch: 20 STUD THREAD. 5 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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