PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

90508Screw,cap,socket Head

L3 Technologies, Inc. Div L3 Keo · NSN 5305-01-143-6076 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-143-6076 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-143-6076. Primary manufacturer part number: 90508.
Features
  • Screw,cap,socket Head — FSC 5305
  • Width Across Flats: 0.156 INCHES NOMINAL IN
  • Head Style: FLAT CHAMFER
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Material Document and Classification: 00-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL
  • Material: NICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL
  • Nominal Thread Diameter: 0.190 INCHES IN
  • Head Diameter: 0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Nickel Alloy 400 or Nickel Alloy R-405 Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-143-6076, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is L3 Technologies, Inc. Div L3 Keo. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-143-6076
Primary Part Number90508
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerL3 Technologies, Inc. Div L3 Keo
StatusACTIVE
Width Across Flats0.156 INCHES NOMINAL IN
Head StyleFLAT CHAMFER
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Material Document and Classification00-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL
MaterialNICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL
Nominal Thread Diameter0.190 INCHES IN
Head Diameter0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
Thread Class3A A
Thread DirectionRIGHT-HAND
Internal Drive StyleHEXAGON
Head Height0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
Thread Length0.512 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
Thread Quantity Per Inch24
Fastener Length0.595 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5815-00-126-793390508 INTERCHANGEABLE
Arm
Telemechanics Inc
5305-00-865-165960-16-1672 INTERCHANGEABLE
Screw,cap,socket Head
Electric Boat Corporation Div General Dynamics Electric Boat
5305-01-052-1161AES14F500875BB3A11 INTERCHANGEABLE
Screw,cap,socket Head
The American Society of Mechanical Engineers
6625-01-092-6826 INTERCHANGEABLE
Colorlith Top
5305-01-143-6072 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-143-607590508 INTERCHANGEABLE
Screw,machine
L3 Technologies, Inc. Div L3 Keo
5305-01-144-6016 INTERCHANGEABLE
Screw,cap,socket Head
5305-01-145-7519100A905069 INTERCHANGEABLE
Screw,cap,socket Head
L3 Technologies, Inc. Div L3 Keo
5305-01-145-7521100A905076 INTERCHANGEABLE
Screw,cap,socket Head
L3 Technologies, Inc. Div L3 Keo
5305-01-145-752290507 INTERCHANGEABLE
Screw,cap,socket Head
L3 Technologies, Inc. Div L3 Keo
Cross-Reference Index
Part NumberManufacturer
90508 PRIMARY L3 Technologies, Inc. Div L3 Keo (USA)
100A905084 L3 Technologies, Inc. Div L3 Keo (USA)
FF-S-86 TYPE VI Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5815-00-126-7933INTERCHANGEABLE
ARM
90508
5305-00-865-1659INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
60-16-1672
5305-01-052-1161INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
AES14F500875BB3A11
6625-01-092-6826INTERCHANGEABLE
COLORLITH TOP
5305-01-143-6072INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-143-6075INTERCHANGEABLE
SCREW,MACHINE
90508
5305-01-144-6016INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-145-7519INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
100A905069
5305-01-145-7521INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
100A905076
5305-01-145-7522INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
90507
5306-01-160-9903INTERCHANGEABLE
BOLT,INTERNAL WRENCHING
31317
4920-01-297-9739INTERCHANGEABLE
TEST PROGRAM SET
90508

Frequently Asked Questions

What is NSN 5305-01-143-6076?

NSN 5305-01-143-6076 is a Screw,cap,socket Head, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-143-6076?

NSN 5305-01-143-6076 has 3 cross-referenced part numbers: 90508 (L3 Technologies, Inc. Div L3 Keo), 100A905084 (L3 Technologies, Inc. Div L3 Keo), FF-S-86 TYPE VI (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5305-01-143-6076?

There are 12 known substitutes for 5305-01-143-6076: 5815-00-126-7933, 5305-00-865-1659, 5305-01-052-1161 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 90508?

Key specifications for 90508: Width Across Flats: 0.156 INCHES NOMINAL IN; Head Style: FLAT CHAMFER; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: 00-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL. 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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