PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12781Screw,cap,hexagon Head

Grove Valve and Regulator Co · NSN 5305-00-021-5918 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-021-5918 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-021-5918. Primary manufacturer part number: 12781.
Features
  • Screw,cap,hexagon Head — FSC 5305
  • Width Between Flats: 0.875 INCHES NOMINAL IN
  • Thread Class: 2A A
  • Thread Direction: RIGHT-HAND
  • Thread Series Designator: UNF
  • Material: STEEL OVERALL
  • Thread Length: 1.500 INCHES MAXIMUM IN
  • Head Style: HEXAGON
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 5305-00-021-5918, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Grove Valve and Regulator Co. 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-00-021-5918
Primary Part Number12781
Item NameScrew,cap,hexagon Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerGrove Valve and Regulator Co
StatusACTIVE
Width Between Flats0.875 INCHES NOMINAL IN
Thread Class2A A
Thread DirectionRIGHT-HAND
Thread Series DesignatorUNF
MaterialSTEEL OVERALL
Thread Length1.500 INCHES MAXIMUM IN
Head StyleHEXAGON
Nominal Thread Diameter0.625 INCHES IN
Head Height0.469 INCHES NOMINAL IN
Thread Quantity Per Inch18
Fastener Length1.500 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5133-00-061-627810917 INTERCHANGEABLE
Drill,twist
Precision Twist Drill Co
5360-00-759-698812781 INTERCHANGEABLE
Spring,helical,compression
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
5955-00-828-95621278-1 INTERCHANGEABLE
Oscillator,noncrystal Controlled
American Trans-Coil Corp
6520-00-935-415012781 INTERCHANGEABLE
File,pulp Canal,dental
Kerr Corporation
5365-00-960-030512781 INTERCHANGEABLE
Shim
Drs C3 & Aviation Company Dba Drs Data & Imaging Systems
2510-01-017-059212781 INTERCHANGEABLE
Shock Absorber,direct Action
Tenneco Inc
6250-01-022-58681278-1 INTERCHANGEABLE
Ballast,lamp
Avtechtyee Inc Dba Avtech
5935-01-048-1721552-30 INTERCHANGEABLE
Plate,retaining,electrical Conne
Kestler Electronics
5310-01-169-550712781 INTERCHANGEABLE
Washer,lock
Paccar Winch Inc Dba Paccar Winch Division
6145-01-259-0308G337848-1 INTERCHANGEABLE
Cable,power,electrical
Raytheon Company Dba Raytheon Co
Cross-Reference Index
Part NumberManufacturer
12781 Grove Valve and Regulator Co (USA)
Related Parts
5133-00-061-6278INTERCHANGEABLE
DRILL,TWIST
10917
5360-00-759-6988INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
12781
5955-00-828-9562INTERCHANGEABLE
OSCILLATOR,NONCRYSTAL CONTROLLED
1278-1
6520-00-935-4150INTERCHANGEABLE
FILE,PULP CANAL,DENTAL
12781
5365-00-960-0305INTERCHANGEABLE
SHIM
12781
2510-01-017-0592INTERCHANGEABLE
SHOCK ABSORBER,DIRECT ACTION
12781
6250-01-022-5868INTERCHANGEABLE
BALLAST,LAMP
1278-1
5935-01-048-1721INTERCHANGEABLE
PLATE,RETAINING,ELECTRICAL CONNE
552-30
5310-01-169-5507INTERCHANGEABLE
WASHER,LOCK
12781
6145-01-259-0308INTERCHANGEABLE
CABLE,POWER,ELECTRICAL
G337848-1
9905-01-349-3262INTERCHANGEABLE
PLATE,INSTRUCTION
12781
5930-01-426-5563INTERCHANGEABLE
SWITCH,TOGGLE
12781

Frequently Asked Questions

What is NSN 5305-00-021-5918?

NSN 5305-00-021-5918 is a Screw,cap,hexagon Head, manufactured by Grove Valve and Regulator Co, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-021-5918?

NSN 5305-00-021-5918 has 1 cross-referenced part number: 12781 (Grove Valve and Regulator Co).

What NSN replaces 5305-00-021-5918?

There are 12 known substitutes for 5305-00-021-5918: 5133-00-061-6278, 5360-00-759-6988, 5955-00-828-9562 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12781?

Key specifications for 12781: Width Between Flats: 0.875 INCHES NOMINAL IN; Thread Class: 2A A; Thread Direction: RIGHT-HAND; Thread Series Designator: UNF. 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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