PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1C648Screw,cap,hexagon Head

Clark Material Handling Company · NSN 5305-00-103-6721 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-103-6721 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-103-6721. Primary manufacturer part number: 1C648.
Features
  • Screw,cap,hexagon Head — FSC 5305
  • Material: STEEL OVERALL
  • Thread Quantity Per Inch: 16
  • Fastener Length: 3.000 INCHES NOMINAL IN
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
  • Material Document and Classification: SAE GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Minimum Tensile Strength: 120000 POUNDS PER SQUARE INCH LBS
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-00-103-6721, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Clark Material Handling Company. Government technical data includes 14 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-00-103-6721
Primary Part Number1C648
Item NameScrew,cap,hexagon Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerClark Material Handling Company
StatusACTIVE
MaterialSTEEL OVERALL
Thread Quantity Per Inch16
Fastener Length3.000 INCHES NOMINAL IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Hardness Rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
Material Document and ClassificationSAE GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Minimum Tensile Strength120000 POUNDS PER SQUARE INCH LBS
Head Height0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Thread Class2A A
Nominal Thread Diameter0.375 INCHES IN
Width Between Flats0.551 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
Thread Length1.000 INCHES MINIMUM IN
Head StyleHEXAGON
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5305-00-017-9851 INTERCHANGEABLE
Screw,cap,hexagon Head
5950-00-159-7360 INTERCHANGEABLE
Transformer,audio Frequency
4330-00-163-031899115732 INTERCHANGEABLE
Plunger
Alfa Laval Inc
5950-00-172-8062 INTERCHANGEABLE
Reactor
3030-00-626-66336266633 INTERCHANGEABLE
Belt,v
U S Army Tank Automotive Command Amsta-Im-Mm
5950-00-647-6260 INTERCHANGEABLE
Transformer,power Autotransforme
5940-00-853-62351573-2 INTERCHANGEABLE
Terminal,stud
Keystone Electronics Corp
3040-01-169-060115732 INTERCHANGEABLE
Shaft,straight
Forenta Lp
6520-01-325-975115732 INTERCHANGEABLE
Spreader Set,finger,endodontic
Kerr Corporation
5315-01-415-010015732 INTERCHANGEABLE
Pin,cotter
Dayton-Granger, Inc.
Cross-Reference Index
Part NumberManufacturer
1C648 Clark Equipment Co (USA)
15732 Hyster-Yale Group, Inc. (USA)
905667 New Holland Construction (USA)
1C648 PRIMARY Clark Material Handling Company (USA)
179851 Mitsubishi Caterpillar Forklift America, Inc (USA)
Related Parts
5305-00-017-9851INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5950-00-159-7360INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
4330-00-163-0318INTERCHANGEABLE
PLUNGER
99115732
5950-00-172-8062INTERCHANGEABLE
REACTOR
3030-00-626-6633INTERCHANGEABLE
BELT,V
6266633
5950-00-647-6260INTERCHANGEABLE
TRANSFORMER,POWER AUTOTRANSFORME
5940-00-853-6235INTERCHANGEABLE
TERMINAL,STUD
1573-2
3040-01-169-0601INTERCHANGEABLE
SHAFT,STRAIGHT
15732
6520-01-325-9751INTERCHANGEABLE
SPREADER SET,FINGER,ENDODONTIC
15732
5315-01-415-0100INTERCHANGEABLE
PIN,COTTER
15732
5355-01-486-7823INTERCHANGEABLE
KNOB
179-851
5330-01-663-6628INTERCHANGEABLE
GASKET
15732

Frequently Asked Questions

What is NSN 5305-00-103-6721?

NSN 5305-00-103-6721 is a Screw,cap,hexagon Head, manufactured by Clark Material Handling Company, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-103-6721?

NSN 5305-00-103-6721 has 5 cross-referenced part numbers: 1C648 (Clark Equipment Co), 15732 (Hyster-Yale Group, Inc.), 905667 (New Holland Construction), 1C648 (Clark Material Handling Company), 179851 (Mitsubishi Caterpillar Forklift America, Inc).

What NSN replaces 5305-00-103-6721?

There are 12 known substitutes for 5305-00-103-6721: 5305-00-017-9851, 5950-00-159-7360, 4330-00-163-0318 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1C648?

Key specifications for 1C648: Material: STEEL OVERALL; Thread Quantity Per Inch: 16; Fastener Length: 3.000 INCHES NOMINAL IN; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC). 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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