PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1TKZ6Screw,cap,socket Head

W.w. Grainger, Inc. Div Government Sales Division · NSN 5305-01-628-5939 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-628-5939 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-628-5939. Primary manufacturer part number: 1TKZ6.
Features
  • Screw,cap,socket Head — FSC 5305
  • Thread Series Designator: UNF
  • Thread Class: 3A A
  • Thread Direction: RIGHT-HAND
  • Width Across Flats: 0.125 INCHES NOMINAL IN
  • Thread Length: 0.373 INCHES NOMINAL IN
  • Thread Quantity Per Inch: 32
  • Nominal Thread Diameter: 0.190 INCHES IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-628-5939, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is W.w. Grainger, Inc. Div Government Sales Division. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-628-5939
Primary Part Number1TKZ6
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerW.w. Grainger, Inc. Div Government Sales Division
StatusACTIVE
Thread Series DesignatorUNF
Thread Class3A A
Thread DirectionRIGHT-HAND
Width Across Flats0.125 INCHES NOMINAL IN
Thread Length0.373 INCHES NOMINAL IN
Thread Quantity Per Inch32
Nominal Thread Diameter0.190 INCHES IN
Head StyleFLAT COUNTERSUNK
Head Diameter0.411 INCHES NOMINAL IN
Internal Drive StyleHEXAGON
Fastener Length0.500 INCHES NOMINAL IN
Countersink Angle82.0 DEGREES NOMINAL
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5315-00-272-675113049 INTERCHANGEABLE
Pin,straight,headed
Garwood/feller Inc Garwood Winch Div
5360-01-561-205394-210 INTERCHANGEABLE
Spring,leaf
Eagle Suspensions Inc
Cross-Reference Index
Part NumberManufacturer
1TKZ6 PRIMARY W.w. Grainger, Inc. Div Government Sales Division (USA)
7013201 Marine Corps Systems Command Program Manager Assault Amphibious Vehicle
91263A544 Mcmaster-Carr Supply Co (USA)
05-1-17-153-0FL PRIMARY Stratus Systems, Inc. (USA)
94210 PRIMARY Fastenal Company Dba Fastenal Co (USA)
Related Parts
5315-00-272-6751INTERCHANGEABLE
PIN,STRAIGHT,HEADED
13049
5360-01-561-2053INTERCHANGEABLE
SPRING,LEAF
94-210

Frequently Asked Questions

What is NSN 5305-01-628-5939?

NSN 5305-01-628-5939 is a Screw,cap,socket Head, manufactured by W.w. Grainger, Inc. Div Government Sales Division, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-628-5939?

NSN 5305-01-628-5939 has 5 cross-referenced part numbers: 1TKZ6 (W.w. Grainger, Inc. Div Government Sales Division), 7013201 (Marine Corps Systems Command Program Manager Assault Amphibious Vehicle), 91263A544 (Mcmaster-Carr Supply Co), 05-1-17-153-0FL (Stratus Systems, Inc.), 94210 (Fastenal Company Dba Fastenal Co).

What NSN replaces 5305-01-628-5939?

There are 2 known substitutes for 5305-01-628-5939: 5315-00-272-6751, 5360-01-561-2053. Verify interchangeability with system specifications before substitution.

What are the specifications of 1TKZ6?

Key specifications for 1TKZ6: Thread Series Designator: UNF; Thread Class: 3A A; Thread Direction: RIGHT-HAND; Width Across Flats: 0.125 INCHES NOMINAL IN. 14 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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